Senior Full Stack Engineer (backend leaning)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Full Stack Engineer (backend leaning) based in the United States.

This is a high-impact engineering role within an early-stage, venture-backed fintech environment focused on expanding access to financial tools for underserved populations. You will play a central role in designing, building, and scaling the backend systems that power core financial products used in production at scale. The role emphasizes ownership, speed, and pragmatic engineering decisions, with a strong focus on backend architecture and API development. You will work in a fast-moving, high-trust team where priorities evolve quickly and engineers are expected to operate with significant autonomy. The environment is deeply execution-oriented, with an emphasis on shipping frequently while maintaining strong reliability and performance standards. This is a role for an engineer who enjoys building systems end-to-end and leveraging modern AI tools to increase development velocity without compromising quality.

Own the design, development, deployment, and scaling of backend systems and infrastructure supporting core financial products in a fast-paced fintech environment.

• Build and maintain high-performance APIs and backend services that power customer-facing applications
• Design scalable cloud-native architectures using AWS and Node.js (TypeScript)
• Take full ownership of system reliability, performance, and long-term maintainability
• Ship production-ready code frequently while balancing speed with engineering rigor
• Define and promote backend engineering standards, patterns, and best practices across the team
• Make informed architectural decisions, weighing trade-offs between scalability, speed, and complexity
• Collaborate closely with product engineers and cross-functional stakeholders to translate requirements into technical solutions
• Continuously improve system design to support growth, resilience, and evolving product needs

Requirements:

This role requires strong backend engineering expertise, deep systems thinking, and the ability to thrive in a high-ownership, fast-moving environment.

• 5+ years of professional software engineering experience with a strong backend focus
• Experience building and scaling production systems using Node.js and AWS
• Strong proficiency in TypeScript (preferred)
• Proven ability to design reliable, scalable, and high-performance distributed systems
• Deep understanding of system architecture, performance optimization, and backend fundamentals
• Strong ownership mindset with the ability to drive projects independently from concept to production
• Comfort working in ambiguous environments and making decisions with incomplete information
• Strong communication skills and ability to collaborate effectively across technical and product teams
• Self-starter mentality with a bias toward execution and delivery
• Experience using AI-assisted development tools to improve engineering velocity while maintaining code quality

Benefits:

• Competitive compensation: $150,000 – $250,000 USD annually, plus equity (based on experience and location)
• Early-stage startup equity upside in a fast-growing fintech company
• High-ownership engineering environment with minimal bureaucracy
• Fast-paced culture focused on speed, learning, and impact
• Opportunity to build and scale mission-critical financial infrastructure
• Flexible, execution-driven team environment with significant autonomy
• Exposure to modern AI-assisted engineering practices and tooling.