Remote
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. - Contribute to infrastructure and DevOps best practices, including CI/CD pipelines and containerised deployments. ABOUT YOU - Proven experience designing and delivering robust backend systems, with a strong focus on scalability, maintainability, and performance. - Deep understanding of relational databases, including hands-on experience with PostgreSQL, and confidence in writing optimised SQL.