Senior Backend Engineer – Fintech Start-Up (Digital Only Banking)

Our client, a growing startup in the neobank space is adding two Senior Backend Engineers to join the team. You will work directly with the technical founders to architect, build, and ship a financial services platform across international markets. You will set standards and make decisions that will impact the systems WORKING IN A GREENFIELD ARCHITECTURE! To be successful in this role you need to have experience shipping production fintech software before. Core backend engineer powering the mobile and Web frontends via REST API Handling integration with banking service providers, payment rails, ledger systems, and Cryptocurrency wallet Create engineering standards and technical foundations for a system designed to scale internationally Tech Stack Python (FastAPI) monolith PostgreSQL and Redis on AWS Rust and/or Go for performance-critical service breakouts REST API serving mobile and Web clients Skills 5+ years building and shipping production backend software in Python, Go, and/or Rust Experience at a fintech company such as (e.g. Mercury, Brex, Stripe, Chime, Marqeta, Lithic, or similar) Strong fundamentals across the backend: PostgreSQL, Redis, AWS Experience in fintech, payments, stablecoins and/or banking infrastructure. Track record of shipping at scale in a production environment Full-stack capability — ability to flex into frontend when needed Comfort working at true startup scale — small team, high ownership, significant ambiguity