Senior Backend Engineer

Job description

You design and build payment-critical backend services end to end on a modern Java stack, with a high bar for correctness, reliability and security. What you'll do • Design and build payment-critical backend services and APIs on Java / Spring Boot. • Ensure correctness and reliability under load. • Build robust integrations and event-driven flows. • Write thorough tests and help maintain high engineering standards. • Mentor mid-level engineers.

Requirements

• 5+ years in Java backend with Spring Boot.
• Hands-on payments / fintech experience is required — you have worked on real payment or financial-transaction systems.
• Hands-on experience with at least one payment processor or gateway (e.g. MPGS, Cybersource or mada). This is a requirement for this role.
• Strong microservices and REST API design
• relational databases.
• Solid grasp of transactional integrity and reliability.
• Containers / CI/CD and strong automated testing.
• AI-augmented engineering — you actively use AI coding tools such as Claude Code in your day-to-day development. This is a requirement for this role.
• Nice to have
• Experience with more than one payment processor / gateway.
• Cloud platforms (OCI, AWS or Azure)
• Kafka.

Skills