Staff Full Stack Software Engineer

Staff Backend Engineer – FinTech | New York City

Employment: Full-time We're partnering with an ambitious, venture-backed FinTech company that's modernising critical infrastructure across financial services. They're building a next-generation technology platform that replaces fragmented, manual processes with scalable, intelligent systems. With a lean engineering team and experienced leadership, they're looking for a Staff Backend Engineer to take ownership of core backend architecture and help scale the platform through its next phase of growth. Design, develop and scale high-performance backend services supporting complex financial workflows. Take ownership of backend architecture, scalability, reliability and performance optimisation. Build and optimise distributed services capable of handling growing transaction volumes and data-intensive workloads. Improve database performance, data access patterns and overall system efficiency. Develop and maintain cloud infrastructure to support secure, resilient production environments. Help establish the technical foundations for AI-driven functionality and automation. Strong experience designing and building production-grade backend systems. Expertise in Java, Spring Boot or comparable backend technologies. Proven experience scaling PostgreSQL databases and optimising performance. Strong hands-on experience with AWS in production environments. Ability to take ownership of complex technical challenges from architecture through implementation. Previous FinTech or financial services experience is advantageous, but not essential.225K–$290K base salary plus equity. Shape the architecture and scalability of a growing financial technology platform. Work on complex backend challenges with meaningful production requirements. Collaborate closely with company leadership and help define engineering direction. AI innovation: Contribute to infrastructure supporting intelligent automation and emerging AI capabilities. If you're a strong backend engineer who enjoys solving difficult scalability challenges, taking architectural ownership and building high-performance systems, we'd be keen to speak with you. Apply directly or get in touch for a confidential discussion.