Full Stack Engineer

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. Find Jobs in Germany on Arbeitnow