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 ForAs a Senior Engineer, you'll be expected to bring strong engineering principles backed by at least 5 years of experience. The ideal candidate:Has a strong computer science and programming foundation — has read Designing Data-Intensive ApplicationsIs a craftsperson who deeply cares about the quality of their output and understands the long-term costs of shortcutsBuilds 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 useCommunicates effectively to drive clarity and alignment across the organization — able to translate product requirements into technical challenges and vice versaIs 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 levelHas 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 equivalent)What You'll Work OnBuild and own new user-facing features end-to-end, from database models to UI componentsContinuously improve observability across existing systems — analytics, monitoring, and alertingCollaborate with product and engineering to architect key differentiators, including embedded fintech products and AI agents to help merchants manage their storesBuild CI/CD pipelines and developer tooling (e.g., feature environments) that increase development velocityHelp shape engineering processes to support building a world-class productTech StackFamiliarity with every tool isn't required, but candidates should have the foundational knowledge to understand what powers them under the hood:NodeReactNext.js deployed on VercelTypescriptAWS (particularly RDS)PostgreSQLTerraform or equivalent infrastructure-as-code toolingCompensation & BenefitsSalary: $180K–$220K + meaningful equity, depending on experienceUnlimited PTOFull benefits package: medical, dental, vision, 401(k), transportation, and moreInterview ProcessOne or two 30-minute introductory calls with the engineering teamA take-home exercise to showcase your skills and toolingOnsite interview consisting of:1-hour system design exercise45-minute meeting with the product team and company leadershipOffer