Senior Software Engineer - Node / React

Our client is a fast-growing, venture-backed technology company that has built a modernized Point-of-Sale (POS) platform purpose-built for a niche industry. Two years in, they have achieved meaningful scale — serving 150+ multi-location enterprise customers with a system that operates around the clock across multiple time zones, acting as the core platform for procurement, transactions, and reporting. They work fully in-person, 5 days a week, out of their office in the Flatiron district of New York City. Relocation assistance and visa sponsorship are not available at this time . Who They're Looking F orAs a Senior Engineer, you'll be expected to bring strong engineering principles backed by at least 5 years of experience. The ideal candidat e:Has a strong computer science and programming foundation — has rea d Designing Data-Intensive Applicatio nsIs a craftsperson who deeply cares about the quality of their output and understands the long-term costs of shortcu tsBuilds with the end user and longevity in mind — knows how to design abstractions and APIs that are a pleasure for both customers and teammates to u seCommunicates effectively to drive clarity and alignment across the organization — able to translate product requirements into technical challenges and vice ver saIs genuinely passionate about software engineering and dives deep into topics that interest them, whether that's the Node.js Event Loop or how virtual memory works at the OS lev elHas hands-on experience with serverless architectures — comfortable designing and deploying serverless functions and event-driven systems in cloud environments (e.g., AWS Lambda, Vercel Edge Functions, or equivalen t)What You'll Work OnBuild and own new user-facing features end-to-end, from database models to UI componen tsContinuously improve observability across existing systems — analytics, monitoring, and alerti ngCollaborate with product and engineering to architect key differentiators, including embedded fintech products and AI agents to help merchants manage their stor esBuild CI/CD pipelines and developer tooling (e.g., feature environments) that increase development veloci tyHelp shape engineering processes to support building a world-class produ ctTech Sta ckFamiliarity with every tool isn't required, but candidates should have the foundational knowledge to understand what powers them under the hoo d:No deRea ctNext.js deployed on Verc elTypescri ptAWS (particularly RD S)PostgreS QLTerraform or equivalent infrastructure-as-code tooli ngCompensation & Benefi tsSalar y: $180K–$220K + meaningful equity, depending on experien ceUnlimited P TOFull benefits package: medical, dental, vision, 401(k), transportation, and mo reInterview Proce ssOne or two 30-minute introductory calls with the engineering te amA take-home exercise to showcase your skills and tooli ngOnsite interview consisting o f:1-hour system design exerci se45-minute meeting with the product team and company leadersh ipOff er