Backend Engineer; Python banking​/crypto companies

Target Candidates: banking/payments startups/crypto Job Description

We’re looking for a strong Backend / Python Engineer to help lead the development of a complex financial product handling real money at scale
, across multiple countries.

The backend powers REST APIs used by mobile (iOS/Android) and web clients, and integrates with external services such as crypto wallets, banking providers, payment rails, authentication, and ledgering systems
. This is not a greenfield demo app—this is production software where correctness, security, and reliability matter every day
.

You’ll work closely with technical leadership to set engineering standards and build systems that are performant, auditable, and resilient
. As the platform grows, this role can naturally evolve into a backend or broader engineering leadership position
.

• Building and owning backend services that power web and mobile clients via REST APIs

• Designing and maintaining systems for ledgering, payments orchestration, and wallet integrations

• Integrating with third-party banking, crypto, and payment service providers

• Tackling real-world fintech challenges like anti-fraud, AML flows, reconciliation, and compliance-driven edge cases

• Working primarily in Python (FastAPI) with Postgres and Redis on AWS

• Identifying performance bottlenecks and breaking out services into Go or Rust where it makes sense

• Collaborating directly with technical founders on architecture, standards, and long-term system design

• Experience at fintech, payments, banking, crypto, remittances, or lending startups

• Hands-on experience with payments, ledgering, wallets, AML, fraud, or financial orchestration systems

• 5+ years building and shipping backend applications using Python, Go, or Rust

• Strong backend fundamentals:
  Postgres, Redis, AWS
  , and production operations

• Experience working on real-money financial systems
  , not just adjacent tooling

• Comfortable owning complex backend logic end to end in a startup environment

This role strongly favors engineers who have worked deeply inside fintech or payments products
, especially in startup or scale-up environments.

• Full-stack experience and willingness to flex beyond the backend when needed

• Experience designing financial systems with auditability and correctness as first-class concerns

• Prior exposure to stable coins, wallets, or crypto-native payment flows

• ✅ A core backend role building financial infrastructure
  , not just CRUD APIs

• ✅ High ownership and direct impact on product direction

• ✅ Close collaboration with technical founders

• ❌ Not a megacorp-only background role

• ❌ Not a generalist backend position without fintech/payments depth

• ❌ Not suitable for candidates with minimal real-world Python backend experience

• Location: San Francisco

• Work model: In-office

• Relocation: Open to relocation (no relocation assistance provided)

• Visa sponsorship: Available