Senior Software Engineer, Stablecoin Payments

Flex is building stablecoin products for business owners as part of its financial services platform. The Senior Software Engineer will build backend services for stablecoin payments, connect them with banking systems, and support reliable, compliant movement of customer money.

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

Requirements:

• 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
• 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