Senior Frontend Developer

Senior Frontend Infrastructure Engineer Location: New York City Work Style: Hybrid, 3 days per week in office Compensation: $210K–$380K base salary + equity Employment Type: Full-time Focus: Frontend Infrastructure, React, TypeScript, Performance, Reliability About Our Client Our client is building a company intelligence platform that helps investors, operators, and deal teams discover, analyze, and act on millions of startup and company signals in real time. Their product supports complex search, workflow automation, market discovery, and collaboration across large-scale company datasets. As usage grows, the frontend needs to move from "it works" to "it works flawlessly." This is an opportunity to join a high-performing engineering team at an important inflection point and help build the frontend infrastructure that makes the product faster, more reliable, and easier for other engineers to build on. About the Role Our client is hiring a Senior Frontend Infrastructure Engineer to improve the reliability, performance, and scalability of their core frontend platform. This person will focus on the systems, patterns, and architecture that power a complex frontend used by hundreds of users running sophisticated searches across millions of companies, analyzing large datasets, building workflows, and collaborating on deal flow. This is a high-impact role for an engineer who loves React, TypeScript, frontend architecture, performance optimization, observability, and building the foundation that helps product teams ship faster without breaking critical user workflows. What You'll Do Improve frontend reliability across core product workflows Build robust error boundaries, state management patterns, and data consistency systems Optimize frontend performance for large datasets, complex filters, and data-heavy views Implement virtualization for tables and views with thousands of rows Improve bundle size, render performance, page load speed, and overall user experience Build frontend monitoring and observability to catch issues before users do Establish testing strategies that reduce regressions and improve engineering confidence Create reusable abstractions, patterns, and tooling that help engineers ship faster Drive technical decisions across frontend architecture and infrastructure Mentor engineers through complex migrations, performance work, and reliability improvements Partner with product and engineering teams to make critical workflows faster, smoother, and more resilient What We're Looking For 7+ years of experience building frontend applications at scale Deep expertise in React, TypeScript, and modern frontend build tooling Strong track record improving production frontend performance at scale Experience building reliable, data-heavy, user-facing applications Strong opinions on frontend architecture, supported by real production experience Experience with state management, error handling, testing strategies, and frontend observability Ability to improve developer experience through better abstractions and engineering patterns Strong communication skills and the ability to mentor other engineers Comfort working in a fast-moving, high-ownership engineering environment NYC-based and able to work in office 3 days per week Bonus Experience Experience with discovery systems, search products, recommendation systems, CRM platforms, ATS platforms, or large-scale data indexing workflows Experience building products that help users search, organize, document, and act on complex datasets Exposure to venture capital, private markets, company intelligence, market research, or investment workflows Experience building frontend infrastructure for data visualization, analytics, or collaborative workflow products Why This Opportunity Own frontend infrastructure at a high-growth company intelligence platform Improve performance and reliability for users making critical investment and business decisions Work on complex frontend problems involving large datasets, search, workflows, and collaboration Help transform a fast-growing product from functional to best-in-class Build systems and patterns that multiply the impact of the entire engineering team Step into a senior role with meaningful technical ownership and influence Join a team solving hard problems across real-time data, company intelligence, and modern deal workflows