Senior Backend Engineer - PayLink

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.