Senior Backend Software Engineer

About this role

## OVERVIEW

APEXX is pioneering payment orchestration, transforming the global payments landscape with cutting-edge technology and innovation. As a leader in Fintech, we're committed to excellence, driving forward-thinking solutions that empower businesses worldwide.

Are you passionate about building scalable, resilient systems in the fast-moving world of FinTech?

We’re looking for a Senior Backend Engineer to join our growing technology team. You’ll play a key role in designing and building backend services that power our core platform — enabling real-time transactions, intelligent routing, and seamless third-party integrations with partners across the financial ecosystem.

You’ll work with a modern tech stack — including Java Spring Boot, PostgreSQL, Redis, AWS Lambda, and a wide range of AWS services — and collaborate closely with engineers, product managers, and stakeholders to deliver reliable, high-performance systems.

If you thrive in a collaborative, fast-paced environment and enjoy solving complex engineering challenges, this could be a great fit.

## WHAT YOU'LL BE DOING

• Design, develop, and maintain backend services (utilising Java Spring Boot), contributing to the evolution of our platform and system architecture.
• Optimise backend systems for real-time processing, performance, resilience, and scalability to meet the demands of a growing, enterprise customer base.
• Implement integrations with third-party systems, ensuring secure and reliable data exchange across environments.
• Participate in the full software delivery lifecycle — from requirements gathering to production deployment and ongoing support.
• Troubleshoot production issues and contribute to a culture of operational excellence and continuous improvement.
• Collaborate closely with product managers, designers, and fellow engineers to ensure technical solutions align with business objectives.
• Provide high-quality code reviews and mentor junior engineers where appropriate....