Senior Backend Engineer

Location: Remote (U.S. overlap preferred)
Type: Contract (Full-Time Preferred)
Domain: Payments / Fintech / eCommerce Infrastructure

We 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.

We 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.

• 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

• 6+ years backend experience
• Strong in one or more:
  • Node.js
  • Java
  • Python
  • Go
• Extensive REST API integration experience
• Webhook processing experience
• Payments domain experience required
• Strong understanding of:
  • Auth/Capture flows
  • Refund logic
  • Chargeback lifecycle
  • Subscription billing

• High-Impact Architecture Project
• Executive Visibility
• Competitive Contract Compensation
• Flexible Remote Structure
• Clear Scope, Clear Timeline
• Long-Term Engagement
• Technical Ownership