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About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. The role Fractile is building a full-stack AI accelerator from the ground up, and the compiler team sits at the heart of how we deliver performance. As the Engineering Manager for Compilers, you will build and lead a team of 10+ engineers developing the compiler stack for our novel AI acceleration hardware, with direct responsibility for enabling industry-leading LLM inference performance on Fractile's accelerators. This is a hands-on technical leadership role in a fast-moving, collaborative environment where the compiler team works closely with hardware, driver, runtime and ML engineers across the stack. If you want to shape the architecture of a compiler from first principles, build a world-class team around it, and have your work directly determine the performance of next-generation AI hardware, this is the role. What we're looking for: Proven track record of leadership experience managing a high-performance development team and delivering consistently outstanding outcomes. Proven experience in compiler development, with experience of machine learning compilers and industry standard technologies such as MLIR or TVM being a significant advantage. Up-to-date knowledge of machine learning techniques and technologies A good understanding of computer architecture and performance optimisation techniques. Excellent C/C++ skills and solid experience of industry standard development tools and technologies. A creative and innovative mindset, and a willingness to take ownership and drive results in a fast-paced environment. What you're signing up for: This is a young company doing hard things, at the intersection of novel silicon and the software stack that makes it useful. You'll be building and leading a compiler team as the hardware it targets is still taking shape, which means making architectural decisions against a specification first, then a simulator, then early silicon. The IR design, the lowering strategy, the execution model: you'll help define all of it before you can run it on real hardware. That takes comfort with ambiguity and the ability to make good calls with incomplete information. If that sounds frustrating, this probably isn't the role. If that sounds like the interesting part, we should talk. The boundaries here are soft by design. The compiler team works closely with hardware architects, kernel engineers, runtime teams and ML researchers. You'll need to understand enough of what sits above and below your layer to make good decisions at the boundary, and to build a team that can do the same. That breadth is a feature of the job, not a distraction from it. You'll be there when the first model runs end to end on Fractile silicon. When the lowering strategy you helped design produces a result the hardware team didn't think was possible yet. When the team you hired and grew ships something that goes into every rack we sell. We want a team that reflects the world it's building for, and we welcome applicants from every background, including those whose path here hasn't been straight. We care that you're energised by this kind of work, that you build and develop great engineers, and that you make the people around you better. Come build it with us. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. 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About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. The Role This role sits at the boundary between host and silicon. The kernel driver is key to keeping pace with our ultra-fast devices on cutting-edge server platforms. It's a high-leverage layer where each win shows up as real throughput and latency gains. You'll be there for the pre-silicon simulations, first bring-up, first end-to-end runs, and the moments where performance jumps because of something you shipped. What you'll do Design, develop, and maintain the Linux kernel driver for Fractile's AI accelerator Build the performance-critical kernel-space paths that keep the host stack moving: PCIe device management, DMA, memory handling, interrupt handling, and robust recovery paths Define and evolve the userspace interface the runtime depends on, with a focus on stability, debuggability, and performance Work in a tight co-design loop with hardware, firmware, runtime and ML engineers: validate assumptions, iterate on behaviour, and close gaps early Improve tooling/workflows so we move fast without breaking things What we're looking for You've shipped and maintained Linux kernel device drivers in production. Experience with PCIe-attached devices and custom hardware interfaces is ideal. Strong systems and performance instincts. You can reason about computer architecture, concurrency, and where the time goes Excellent C and/or Rust, and a pragmatic approach to building high-quality, maintainable & secure kernel code You enjoy hard kernel and system-level problems, and you take them end-to-end until the measurements move Computer Science, Electronic Engineering, Maths, Physics, or related degree and 3+ years of industry experience Nice to have GPUs / ML accelerators / high‑throughput I/O (NICs, RDMA, storage) Hardware bring‑up or pre‑silicon simulation experience Performance work: profiling, tracing, benchmarking, regression tracking If you want to build the software where every driver win unlocks huge system performance, come build it together. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. The Role We build the control chain that powers on, monitors, updates, and protects devices and racks across bare metal, RTOS, and embedded Linux. It's production-critical software that keeps racks stable, updates safe, and hardware secure. It's a critical layer in turning a tokens per second benchmark into a tokens per month system, turning great silicon into reliable output at rack scale. You'll be there for the first racks coming to life and rollout days where update safety matters. Your work makes the difference between a bad failure and a clean recovery path. This is the work that makes the system something operators can trust. What you'll do Develop firmware and services for management controllers at every level: rack management, BMC, and board/device controllers (RTOS and bare metal) Build systems software for board and rack management, from early bring-up through to production deployment Implement the critical flows that keep fleets healthy: power-on and provisioning, monitoring/telemetry, updates, recovery, and security Integrate with the wider host/device stack (drivers and runtime libraries) so the system works end-to-end Work closely with hardware and device software teams to define reliable interfaces, validate behaviour, and debug boundary issues What we're looking for Proven experience shipping production-critical, reliable embedded systems across two or more of: bare metal, RTOS, embedded Linux (or deep expertise in one with clear ability to ramp the others) Strong C and/or Rust, and excellent engineering judgement around safety, testing, debugging, and failure modes A reliability-first mindset: you design for observability, diagnosability, and recovery paths that are predictable and testable Comfortable working close to the hardware/software boundary (bootloaders/BSP/kernel-adjacent work) and collaborating tightly with HW, driver, and runtime teams Collaborative and high-ownership. You communicate clearly, move fast, and enjoy working through hard problems with others Computer Science, Electronic Engineering, Maths, Physics, or related degree and 3+ years of industry experience Nice to have Embedded platform / systems firmware experience (board management, BMC-style stacks, rack controllers) OpenBMC experience and/or embedded Linux image build/customisation experience Zephyr (or similar RTOS) experience Security-minded, with practical instincts around secure boot, signed updates, device identity, and designing systems that fail safe and recover cleanly (direct experience in some areas is a plus) Kernel device work (drivers, device tree, bring-up, perf/trace) Hardware bring-up experience, including lab tools (logic analysers, oscilloscopes, waveform viewers) RISC-V familiarity Experience with GPUs or ML accelerators If you want to build the control software that keeps rack-scale systems stable, safe, and secure for next-gen AI, come build it together. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. About the Software organisation at Fractile PerfSim sits within the Software organisation at Fractile, which is responsible for developing a full software stack for our groundbreaking AI inference systems. That's everything from ML compilers, device drivers and systems firmware, application level runtime and ecosystem integrations, ML and compute libraries, great developer tooling and a full portfolio of simulators, through to datacenter scale workload deployment solutions. At Fractile, we know that a fantastic software stack is a critical and central part of any AI inference solution and it sits at the heart of everything we're doing. About the team and role To build hardware that doesn't yet exist, you first have to model it — with precision, depth, and an eye for the trade-offs that matter. At Fractile, high-fidelity pre-silicon models shape our architecture, performance, and product design long before hardware exists. The Simulation team includes C++ and SystemC specialists, verification and validation engineers, system architects, and embedded engineers. This is not a support function — it is the group that defines how Fractile's hardware behaves. As a Modelling Engineer you will develop the pre-silicon models of Fractile's AI acceleration hardware, enabling architectural exploration and definition, functional modelling, performance modelling and bottleneck analysis, and early software development on virtual platforms. You will work closely with hardware, software, and ML teams in a true hardware–software co-design loop. About you You have a genuine curiosity for hard problems and the depth to operate across architecture, performance, and functional correctness. You understand that the models you build will shape the architecture of Fractile's accelerator, determine performance trade-offs, enable early runtime and compiler development, unblock software teams months before silicon exists, and reduce risk across the entire product lifecycle. You take that responsibility seriously and bring the rigour it demands. Key Requirements Experience in pre-silicon modelling of complex semiconductor IP SystemC or equivalent modelling frameworks C++ for high-performance simulation Performance modelling and architectural analysis Verification and functional modelling Nice to Have Experience with ML workloads or ML accelerator architectures Prior startup or small-team experience What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. Key Responsibilities Own and define the DFT architecture for a large AI accelerator SoC (scan, compression, MBIST, LBIST, boundary scan) Set DFT strategy, methodology, flow and signoff criteria Drive integration of DFT tools and flows into the overall EDA environment Define hierarchical DFT approach for multi-core designs and large memory systems Define scan architecture, compression strategy, and ATPG approach Define memory test and repair strategy for large embedded RAM Establish power-aware and at-speed test strategies Work closely with RTL and physical design to ensure clean DFT integration and timing closure Work with test and product engineering teams to bring up and debug ATPG patterns on ATE, supporting production test and yield ramp Mentor and guide DFT engineers Required Experience Strong experience in DFT for complex ASIC/SoC designs (typically 8+ years) Proven ownership of DFT architecture on at least one large tapeout Deep expertise in scan, compression, ATPG, and MBIST Experience with industry tools (Synopsys or Tessent) Strong understanding of clocking, resets, power domains, and physical constraints Experience with silicon bring-up, debug, and yield ramp Profile Comfortable owning ambiguous, high-impact problems Balances architectural thinking with hands-on execution Sets direction while staying close to implementation details What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. Key Responsibilities: Create and support Python tooling and silicon verification and physical design workflows centred around silicon EDA tooling, which will require coding and build-system knowledge to assist with tasks faced by different teams. Bazel build system support for new silicon EDA tools required for throughout the chip lifecycle Create and improve Python developer tools across frontend and backend silicon teams Improve existing workflows to make them cacheable and reproducible Work with the engineering team to build and optimise their workloads It would be great if you have: Experience of silicon EDA tooling Experience working with build systems tooling, such as Bazel. Experience working with workload management tools, such as Slurm. Experience working with container orchestration tools, such as Docker, and Kubernetes. Experience working with infrastructure as code, such as Ansible, or Terraform and maintaining compute infrastructure Experience of setup and monitor observation tooling for resource utilisation, machine failures, and more (e.g. Prometheus/Zabbix) Preferred Qualifications: Proficient in modern software development language(s) especially Python Proficient dealing with modern build systems e.g. Bazel, Pants Past experience with diagnosing and resolving network/storage/CPU/RAM bottlenecks across complex workloads. Experience deploying and managing a grid compute system (Slurm/LSF/SGE). Proficiency with containerisation frameworks (Docker/Singularity) What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. We are looking for a highly motivated and experienced RTL Design Engineer to join our dynamic team. In this role, you will play a key part in the design and implementation of digital systems, contributing to every stage of the project lifecycle. Your work will involve developing and optimising Register Transfer Level (RTL) designs for high-performance and power-efficient systems RTL Development and Implementation: Develop and maintain RTL specifications for digital designs, ensuring clarity and accuracy. Implement complex design modules with a focus on performance, power, and area efficiency. Take ownership of design tasks, including planning, execution, and delivery of work packages. Define design tasks for the project, including partitioning, interface specifications, and module definitions. Collaborate with verification engineers to ensure functional correctness through simulation and formal verification. Cross-Functional Collaboration: Work closely with physical design engineers, and verification teams to ensure seamless integration of the design. Documentation and Standards Compliance: Document RTL design methodologies, module interfaces, and functional requirements. Ensure adherence to coding standards, best practices, and maintainability guidelines. Qualifications and Skills: Education: Bachelor's, Master's, or Ph.D. in Electrical Engineering, Computer Engineering, or a related field. Experience: 6+ years of experience in digital design, RTL development, or related roles. Proven expertise in developing RTL designs for high-performance systems. Familiarity with advanced digital design concepts, such as pipelining, clock-domain crossing, and power gating. Experience with high-speed or low-power design methodologies. Soft Skills: Strong analytical and problem-solving skills. Effective communication and collaboration abilities in cross-functional teams. A detail-oriented approach with a focus on quality and efficiency. How we work Ownership and execution: you will have full agency to drive your work forward Rapid iteration: we all work directly with top leadership to move from idea to hardware on ambitious timelines Full-stack engagement: hardware, software, silicon, and modelling teams all work closely together to create a product with generational impact Optimistic and pragmatic: we possess the will to win, and to do the hard work to get us there Team player mentality: the mission is bigger than any of us, and we have the curiosity and technical focus to see the best idea shipped, no matter who's it is What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. About the role Based in the UK you will be a key member of the Manufacturing Operations team where you will drive the development of our business management systems as well as our product, supplier, software and customer quality initiatives. You will be comfortable with assessing processes and technologies to identify quality gaps and provide robust but pragmatic solutions to drive all aspects of the business in achieving the highest levels of quality and resilience. Key responsibilities Define and deliver the company quality strategy, policy and objectives, aligned to the product roadmap and growth plan. Build, lead and develop a quality team covering supplier, product, reliability, software and systems quality. Define and report quality performance to the executive team. Establish appropriate document control, change control, CAPA, internal audit, training and records processes that scale with a fast-growing fabless company. Work with PMO to embed quality gates into the new product introduction (NPI) and product lifecycle process, from concept through end of life. Own quality across the supply chain: wafer foundry, assembly and packaging, wafer and final test, PCB/PCBA and system-level contract manufacturers. Lead supplier selection, qualification, audits and ongoing performance management, including scorecards and quarterly business reviews. Work with engineering leaders to define software quality standards across drivers, firmware, compilers, SDKs and runtime. Establish release criteria, test coverage expectations, defect management and regression processes, aligned with CI/CD practice. Bring in secure development and software supply chain practice, including SBOMs and vulnerability management. Support responsible AI and AI management practice where customers ask for it, including awareness of ISO/IEC 42001. Be the senior point of contact for customer quality, audits and escalations. Lead customer RMA and complaint handling, root cause analysis and 8D responses to agreed timelines. Ensure product compliance with RoHS, REACH, WEEE, conflict minerals reporting, UKCA and CE marking, and relevant safety and EMC standards. Essential experience and skills Significant experience in quality roles in semiconductors or electronics hardware, including creating and leading a quality function or team. Direct experience managing quality through outsourced manufacturing: foundries, OSATs, test houses and/or contract manufacturers. Deep knowledge of ISO 9001 and hands-on experience building or running a certified QMS. Working knowledge of semiconductor qualification and reliability (JEDEC), failure analysis and Awareness of data centre RAS assessments and HPC system qualification and certification. Fluency in core quality tools: 8D, FMEA, control plans, SPC, MSA and root cause analysis. Experience handling customer quality escalations with large, demanding customers. Degree in electrical or electronic engineering, materials science, physics or a related discipline. Clear, confident communicator who can influence engineers, suppliers and executives, and hold partners to account. Willing to travel internationally, including to Asia and US, for supplier audits and customer quality reviews. Desirable Experience in a fabless company, particularly one bringing an initial product to volume. Background in high-performance compute, data centre, networking or AI hardware. Exposure to software quality, release management or secure development practice. Lead auditor certification (ISO 9001), Six Sigma Black Belt, or chartered status (for example CQI or IET). Experience working with suppliers in Taiwan, South Korea or US. The impact you will have You will help Fractile to makes sure every one of our suppliers builds to our standard, and that our customers receive AI hardware and software they can trust in production whilst shaping the quality culture across engineering, operations and commercial teams. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. Summary We are seeking an experienced Semiconductor Product Engineer to lead the development and deployment of manufacturing test solutions for next-generation AI accelerator devices. This role spans the full silicon lifecycle from first silicon bring-up through high-volume production, with responsibility for defining test strategy, developing ATE test content, debugging complex silicon issues, and optimizing yield, coverage, and test cost. The ideal candidate will bring deep expertise in DFT methodologies, high-speed interface testing, and advanced CMOS manufacturing, and will work closely with design, DFT, packaging, and manufacturing partners to ensure robust, scalable production of high-performance compute silicon. Key Responsibilities Define and develop test methods and strategies for an AI accelerator chip targeting high-volume manufacturing. Plan and manage manufacturing test content for advanced CMOS designs including high-speed logic, SRAM, DRAM, and high speed IO blocks. Develop and debug structural and functional test content such as scan/ATPG, LBIST, MBIST, JTAG, and HSIO tests. Bring up first silicon on ATE, including pattern debug, tester correlation, shmooing, and corner analysis. Support testing of high-speed interfaces such as PCIe Gen6 and multi-GHz LPDDR, including at-speed tests and margining features. Execute silicon characterization and failure analysis to identify yield limiters and defect mechanisms. Optimize test coverage, test time, and cost while maintaining manufacturing robustness. Work with DFT and design teams to improve testability and close coverage gaps. Collaborate with OSATs and external partners on test program deployment. Support advanced packaging test flows, including die-to-die interconnect testing and package-level thermal considerations. Contribute to documentation of test programs, debug procedures, and manufacturing release materials. Support qualification, reliability testing, and high-volume manufacturing ramp. Required Qualifications 5+ years of hands-on semiconductor test engineering experience. Experience developing ATE test programs (Advantest 93K, Teradyne, or similar). Solid understanding of DFT methodologies (scan, ATPG, MBIST, LBIST) and memory test techniques. Experience debugging silicon issues and correlating failures to design or process causes. Familiarity with advanced CMOS nodes and production test challenges. Ability to work effectively in a cross-functional engineering environment. Preferred Qualifications Experience testing AI accelerators, GPUs, networking ASICs, or other high-performance compute ICs. Experience with PCIe Gen5/Gen6, LPDDR4/5/6, or other high-speed interfaces. Exposure to advanced packaging, chiplets, or multi-die test flows. Experience improving yield, reducing test time, or optimizing cost in high-volume manufacturing. How we work Ownership and execution: you will have full agency to drive your work forward Rapid iteration: we all work directly with top leadership to move from idea to hardware on ambitious timelines Full-stack engagement: hardware, software, silicon, and modelling teams all work closely together to create a product with generational impact Optimistic and pragmatic: we possess the will to win, and to do the hard work to get us there Team player mentality: the mission is bigger than any of us, and we have the curiosity and technical focus to see the best idea shipped, no matter who's it is What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. About the Hardware organisation at Fractile System Architecture sits within the Hardware organisation at Fractile, responsible for designing the chips and systems that power our groundbreaking AI inference accelerator. That's everything from chip-level architecture and interconnects, through board design and thermal management, to full system integration and bring-up. At Fractile, we know that world-class system architecture is the foundation every other part of the stack is built on. About the team and role The System Architecture team at Fractile defines how our hardware comes together — from chip interfaces and interconnects through to board design, thermal management, and system-level integration — working closely with digital design, verification, firmware and software teams to make sure architecture choices translate cleanly into working silicon and reliable hardware platforms. As an Early Career System Architect, you'll support senior architects in defining and refining this architecture, and get hands-on exposure to early prototyping, bring-up, and system testing as ideas become real hardware. About you We're looking for someone early in their career with a strong foundation in digital systems and computer architecture, gained through a degree, internships, or personal projects, who is genuinely curious about how complex hardware systems are taken from concept through to production. You'll be comfortable working across disciplines — hardware, firmware, and software — and keen to learn fast in a fast-moving environment. Key Requirements A degree (or final-year study) in Electronic Engineering, Computer Engineering, Physics, or a related field Exposure to system-level design concepts — power, thermal, I/O, memory, or interconnect architectures — through academic projects, internships, or personal projects Some familiarity with digital design flows, gained through coursework, internships, or personal projects Comfortable working across disciplines — hardware, firmware, and software Strong communicator, able to explain technical ideas clearly to others Desirable: exposure to AI acceleration, HPC, or data-centric architectures; hands-on FPGA prototyping or hardware bring-up; familiarity with SystemC or MATLAB What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. About the Hardware organisation at Fractile SoC Architecture sits within Fractile's hardware organisation, which owns everything from full-chip architecture definition through memory hierarchies, on-chip interconnects, and the path from early architectural exploration through to tapeout and post-silicon validation. Architecture at Fractile isn't a paper exercise — it's built in constant collaboration with logical design, physical design, and verification teams, so that every architectural decision is grounded in what will actually perform in working silicon. About the team and role As an Early Career SoC Architect, you'll join our architecture team to learn how our compute engines, memory hierarchies, on-chip interconnects and I/O come together into a single coherent chip. Working closely with senior architects and our logical design, physical design, and verification teams, you'll get real exposure to full-chip performance modelling, specification writing, cross-block trade-off analysis, and pre- and post-silicon validation — with experienced architects mentoring you as you build toward owning more of this yourself. About you We're looking for someone with a strong foundational understanding of computer or SoC architecture — built through coursework, personal projects, internships, placements, or research — who's genuinely curious about how compute, memory and interconnect choices trade off against each other at the full-chip level, and eager to learn how to navigate them. You don't need prior industry experience as an SoC Architect; what matters is real hands-on exposure to chip-level or system design, through a final-year project, FPGA build, RISC-V SoC implementation, internship, or research, plus a comfort working across disciplines and a track record of thriving in ambiguity and fast iteration. Key Requirements A degree (BEng, MEng, MSc or equivalent) in Electronic Engineering, Computer Engineering, Computer Science, or a related field — or equivalent practical experience. A solid foundational understanding of SoC or computer architecture, including memory hierarchies, on-chip interconnects, and how compute, memory and I/O blocks integrate into a coherent chip, gained through study, projects, internships, or research. Some exposure to RTL design concepts and how physical design constraints feed back into architectural choices — academic or internship-level experience is fine. Any hands-on exposure to architectural performance modelling tools (gem5, SystemC, or custom cycle-accurate simulators), interconnect/NoC design, compiler/toolchain interactions, or AI acceleration/vector-matrix compute, through study or projects, is highly valued. A clear communicator, comfortable working across architecture, modelling, implementation, verification, and software teams, who thrives in ambiguity and fast iteration. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow

About Fractile Fractile was founded in 2022 on the bet that, eventually, the world's most capable AI systems would be limited in their impact by the time taken to produce useful outputs. We bet everything on the logical conclusion: that the only way to truly unlock this latent value, to make speed viable at scale, was to radically re-invent the hardware that we run our frontier AI models on. Ever since, we have been building chips and systems that tackle this problem: how to efficiently generate output at thousands of tokens per second, while handling the complexity and capacity challenges of operating large models at very long contexts. The workloads that push to the limits of the current frontier are already transformational; it is the technical and economic limits on inference speed that are constraining progress. The defining work of the 21st century will be marked by the engine of inference delivering immense and diffuse chains of intellectual inquiry, in drug discovery, in software engineering, in materials discovery, in any field where progress is driven by deep reasoning and intelligence to resolve complex problems. About the Hardware organisation at Fractile Processor Architecture sits within Fractile's hardware organisation, which owns everything from compute engine definition and ISA design through memory hierarchies, on-chip interconnects, and the path from early architectural exploration through to tapeout and post-silicon validation. Architecture at Fractile isn't a paper exercise — it's built in constant collaboration with logical design, physical design, and verification teams, so that every architectural decision is grounded in what will actually perform in working silicon. About the team and role As an Early Career Processor Architect, you'll join our architecture team to learn how to define the compute engines, ISA definitions and programming models that sit at the heart of our silicon. Working closely with senior architects and our logical design, physical design, and verification teams, you'll get real exposure to performance modelling, specification writing, bottleneck analysis, and pre- and post-silicon validation — with experienced architects mentoring you as you build toward owning more of this yourself. About you We're looking for someone with a strong foundational understanding of computer or processor architecture — built through coursework, personal projects, internships, placements, or research — who's genuinely curious about performance and power trade-offs and eager to learn how to navigate them. You don't need prior industry experience as a Processor Architect; what matters is real hands-on exposure to processor or accelerator design, through a final-year project, FPGA build, RISC-V implementation, internship, or research, plus a comfort working across disciplines and a track record of thriving in ambiguity and fast iteration. Key Requirements A degree (BEng, MEng, MSc or equivalent) in Electronic Engineering, Computer Engineering, Computer Science, or a related field — or equivalent practical experience. A solid foundational understanding of computer/processor architecture, including matrix- and vector-centric floating-point arithmetic and memory hierarchies, gained through study, projects, internships, or research. Some exposure to RTL design concepts and how physical design constraints feed back into architectural choices — academic or internship-level experience is fine. Any hands-on exposure to architectural performance modelling tools (gem5, SystemC, or custom cycle-accurate simulators), compiler/toolchain interactions, or AI acceleration/vector-matrix compute, through study or projects, is highly valued. A clear communicator, comfortable working across architecture, modelling, implementation, verification, and software teams, who thrives in ambiguity and fast iteration. What We Offer Competitive salary: A competitive salary reflective of your experience and the specialist nature of the role. Equity & Ownership: meaningful equity so everyone shares in the value creation Benefits: Private Medical, Dental and Vision, Contributory Pension, 25 Days holiday plus bank holidays and Life/Critical Illness Insurance. Diverse & fun office: we believe the hardest problems get solved by the broadest range of minds. We are committed to Equal Employment Opportunity through attracting and retaining a diverse team and building an inclusive environment. Fractile is seeking to increase the clock speed of global progress, one chip at a time. We've recently raised $220M from investors including Founders Fund and Accel and our most important work lies ahead. Join us! Export controls Our work involves technologies subject to UK, US and other international export control regulations. Certain roles may require additional eligibility checks to ensure compliance with applicable law. We'll be transparent about this throughout the hiring process. Find more English Speaking Jobs in United Kingdom on Arbeitnow