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Staff/Principal/Lead Backend Engineer (Python/Fintech)

RemoteStar • San Francisco Bay Area
Visa Sponsorship Relocation
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Lead the design, architecture, and scaling of mission-critical fintech backend systems at a San Francisco-based startup. Own payments, wallets, ledgers, and financial integrations while mentoring engineers and establishing backend standards. Requires 5+ years of Python backend experience with FastAPI, PostgreSQL, and AWS.

Key Highlights
Staff/Principal/Lead level role with direct founder collaboration
Ownership of backend architecture, scalability, reliability, and security for fintech platform
Mission-critical systems handling real money, payments, crypto, and banking integrations
Key Responsibilities
Design, build, and scale mission-critical backend systems and APIs for fintech infrastructure
Own architecture across payments, wallets, ledgers, and financial integrations with transaction accuracy and data integrity
Improve performance, scalability, fault tolerance, and observability of distributed systems
Integrate with banking, payment, crypto, authentication, and compliance providers
Mentor engineers and establish backend engineering standards as the team grows
Technical Skills Required
Python FastAPI PostgreSQL
Benefits & Perks
Relocation Assistance Available
H-1B Transfer Supported
Nice to Have
Go
Rust
Kafka
Docker
Kubernetes
Terraform
CI/CD
Event-driven architectures
Payments / Payment Processing
Transaction Ledgers / Double-Entry Accounting
Digital Wallets
Banking Infrastructure
Settlement & Reconciliation
Fraud / Risk Systems
AML / KYC
Crypto / Blockchain / Stablecoins

Job Description

  • Backend / Python Software Engineer — Staff / Principal / Lead
  • San Francisco, CA — Onsite
  • Full-Time
  • Relocation Assistance Available | H-1B Transfer Supported

About the Role

We are hiring a Staff / Principal / Lead Backend Engineer for a well-funded San Francisco fintech startup building next-generation infrastructure across banking, payments, digital wallets, and cryptocurrency.

The platform handles real money at international scale, integrating with banking providers, cryptocurrency wallets, payment rails, authentication systems, ledgers, and other financial services.

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