Senior Fintech Backend Engineer – Stablecoin Payments

BranchFactor; San Francisco, Miami, New York (CA, FL, NY); Hybrid; USD 180,000 - 240,000; Full time

Job summary

Flex is building stablecoin products for business owners, and we need engineers who can ship them. You’ll join early, build services that move customer money on-chain and connect them to the banking systems Flex already runs, with direct access to the engineering lead and product.

Crypto experience helps but isn’t required. The work is fintech engineering: payments, onboarding, compliance, and reliability; if you’ve built that kind of system and want to learn crypto, we want to talk.

Qualifications

• 5+ years of backend software engineering experience.
• Experience in fintech/payments or banking.
• Familiar with KYB/KYC/AML and audit requirements.
• Strong system design for money movement, reliability.
• Clear communicator with technical and non-technical partners.

Responsibilities

• Design, build, and run backend services for stablecoin payments, including deposits, withdrawals, and on and off ramps.
• Integrate with partners for wallets, virtual accounts, and stablecoin orchestration.
• Build business onboarding (KYB) and compliance flows that stand up to banking audits.
• Connect new stablecoin products to Flex’s existing banking, ledger, and payments systems.
• Own your work from design through launch and production support.
• Work closely with product, design, compliance, and business development.
• Help set technical direction of the team’s roadmap.
• Onboard and mentor new teammates.

Skills

Backend engineering

Fintech payments

System design

Communication

End-to-end ownership

Tools

Go

Python

Java

Job description

Flex is building stablecoin products for business owners, and we need engineers who can ship them. You’ll join early, build services that move customer money on-chain and connect them to the banking systems Flex already runs, with direct access to the engineering lead and product.

Crypto experience helps but isn’t required. The work is fintech engineering: payments, onboarding, compliance, and reliability; if you’ve built that kind of system and want to learn crypto, we want to talk.