Senior Backend Engineer - Payments

Location: Remote (U.S. overlap preferred) Type: Contract (Full-Time Preferred) Domain: Payments / Fintech / eCommerce Infrastructure About the ProjectWe are leading a modernization initiative for a high-growth digital commerce platform focused on payment orchestration, gateway optimization, and API-driven architecture. Experience with orchestration platforms such as Gr4vy, Stripe, etc. is highly desirable, but not required. Deep payments experience is mandatory. About the RoleWe are seeking a senior backend engineer to support a payment modernization initiative. You will work directly under the CTO to build and integrate payment orchestration systems and direct PSP connections. Responsibilities• Build and maintain API integrations with multiple PSPs • Implement payment routing logic • Develop webhook handlers • Implement tokenization flows • Support subscription billing logic • Ensure resilience, observability, and clean error handling