Senior Backend Engineer, Fintech
Core
Design and build core banking infrastructure, money movement capabilities, and ledger integrity for healthcare practices.
Role type
Senior Backend Engineer (Fintech)
Builds
Banking infrastructure, payment rails, and financial systems
Domain
Fintech / Healthcare
Required skills
Node.js/TypeScript, PostgreSQL, system design, financial correctness, idempotency, event ordering, retries, audit trails, reconciliation, third-party integrations
Preferred skills
US payment rails (ACH, wires, RTP, FedNow), expense management, card issuing, healthcare payments (ERA/835), zero-to-one product building
Technologies
Node.js, TypeScript, PostgreSQL
Responsibilities
Design and build core banking infrastructure including account opening, balances, statements, and backend APIs; Build and maintain money movement capabilities across US payment rails; Own ledger integrity and transaction processing; Integrate banking products with cards, BillPay, and accounting systems; Build capabilities for incoming funds like insurance payouts; Work with sponsor banks and payment processors on integrations and compliance; Design reliable systems for payment exceptions and settlement; Partner with product and design teams to scope features and write technical designs; Make foundational architecture decisions and mentor engineers