Senior Backend Engineer - PayLink

About the job

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.