Full Stack Engineer

About the role

About the Role Join a lean, four-person engineering team at a fast-growing Series A fintech startup building an AI-powered investing platform targeted at the next generation of investors. With millions of downloads and a rapidly scaling user base, this is a high-ownership, hands-on role at a critical inflection point in the company's growth. You'll own the technical foundation across iOS, Node.js backend services, and AWS infrastructure — reporting directly to the Head of Engineering from our New York City office . Visa sponsorship is available. What You'll Do Lead deep investigations into complex production issues spanning iOS, backend services, and cloud infrastructure. Perform root-cause analysis across API layers, async workflows, data models, third-party integrations, and infrastructure. Improve backend service reliability, correctness, and performance in Node.js and TypeScript . Optimize MongoDB queries, indexes, and data access patterns for performance at scale. Strengthen AWS infrastructure stability across Elastic Beanstalk, EC2, deployments, and monitoring. Improve observability using structured logging, metrics, and CloudWatch. Reduce recurring bug classes by improving validation layers, error handling, and system boundaries. Strengthen CI/CD and release processes to reduce production risk. Build internal tools and scripts that improve debugging efficiency and engineering velocity. Partner closely with product and engineering to drive platform-level improvements. What We're Looking For Required: 3–7+ years of engineering experience, including time at a startup and exposure to systems at scale. Strong production debugging skills — able to trace issues across iOS, backend, database, and AWS layers. Deep experience building and improving backend services in Node.js and TypeScript . Solid understanding of MongoDB performance, indexing, and data modeling. Hands-on experience operating and optimizing systems in AWS environments. High ownership mentality with clear, structured communication in fast-moving environments. Based in or willing to relocate to New York City . Nice to Have: Comfort navigating and contributing to Swift and SwiftUI codebases. Background in fintech or payments. Strong CS fundamentals. Compensation & Benefits Salary: $170,000 – $220,000 per year Equity participation in a well-funded, high-growth fintech startup Visa sponsorship available Location This is an on-site role based in New York City, NY . Candidates must be located in NYC or willing to relocate.