Senior Software Engineer, Stablecoin Payments

The role

You will design, build and run backend services that move customer money on-chain for stablecoin payments. You will connect these products to Flex's existing banking, ledger and payments systems and own the work from design through production support.

What you will do

• 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

Required qualifications

• 5+ years of backend software engineering experience
• Experience building and running production services in fintech, payments, or banking
• Experience with compliance-driven systems such as KYB, KYC, AML, or audit requirements, and comfort working with compliance stakeholders
• Strong system design skills, especially for money movement: accuracy, reliability, and handling failures safely
• Proficiency in a modern backend language
• Comfortable owning problems end to end in a small, fast-moving team
• Clear communicator with technical and non-technical partners

Nice to have

• Hands-on crypto experience: stablecoins, wallets, custody, on-chain transactions, etc.
• Experience with on and off ramps, virtual accounts, or stablecoin orchestration
• Smart contract development or auditing experience
• Prior experience at a startup or high-growth company

Benefits

• Meaningful equity
• Direct access to leadership, customers, and investors
• Small teams, high trust, real accountability

Before you apply

• Crypto experience helps but is not required

About the company

Flex is building AI-native financial services for business owners, covering banking, credit, payments and financial operations. The company launched publicly in September 2023 and has raised $100M+ in equity and $300M+ in debt.