Senior Full Stack Engineer; backend leaning Job Washington area,District of Columbia USA,Software Development

Position: Senior Full Stack Engineer (backend leaning)

Backend Engineer Opportunity

Our client is an early-stage, venture-backed fintech startup on a mission to expand access to financial tools for people historically excluded from the traditional credit system. They're growing fast, capital-efficient, and looking for a Backend Engineer to help build and scale the infrastructure powering their products.

This is a high-ownership role for someone who wants to own systems end-to-end, move fast, and lean heavily into AI-assisted development to multiply their output without sacrificing quality.

What You'll Do

Own backend systems and infrastructure end-to-end, from design through deployment and scaling
Build performant, reliable APIs and services that power core financial products
Design and implement scalable architectures on AWS using Node (Type Script)
Make pragmatic tradeoffs between speed, reliability, scalability, and maintainability
Ship production code frequently while maintaining high quality standards
Help establish technical patterns and best practices for the engineering team
Interface effectively with product engineers and other stakeholders

What We're Looking For

Bachelor's degree in Computer Science or a related technical field
5+ years of professional software engineering experience, with a significant backend focus
Experience building and scaling production systems with Node and AWS
Proficiency with Type Script strongly preferred
Track record of delivering reliable, performant systems at scale
Systems-oriented mindset with a deep focus on performance, reliability, and scalability
Strong sense of ownership and accountability for system outcomes
Comfortable thinking critically about architectural decisions and their long-term implications
Thrives in ambiguity and can make sound technical decisions with incomplete information
Self-starter who can work independently and drive projects to completion
Embraces AI-assisted development to accelerate output while maintaining high code quality

What to Expect

High ownership with minimal bureaucracy
A fast-moving environment where roles and priorities evolve quickly
An intense pace of execution and growth — this is not a 9-to-5, work-life-balance-optimized role
Speed, learning, and impact as core values

Compensation:
Salary range of 150-250k USD/year + equity, depending on location and seniority.