Summary: Seeking a Backend Developer to join a client's team, responsible for developing and maintaining critical data interfaces within the evolving payments industry. Highlights: 1. Opportunity to grow in an innovative environment. 2. Develop and maintain critical data interfaces (real-time & batch). 3. Collaborate with cross-functional teams in the payments industry. At TechBiz Global, we are providing recruitment service to our TOP clients from our portfolio. We are currently seeking a **Backend Developer** to join one of our **clients**' teams. If you're looking for an exciting opportunity to grow in a innovative environment, this could be the perfect fit for you. In this role, you will be responsible for developing and maintaining critical data interfaces, working with both real\-time data streams and high\-volume batch processing systems. You will collaborate closely with cross\-functional teams, including Business Analysts and Project Managers, to deliver robust solutions that support business needs, particularly within the evolving payments industry. ### **Key Responsibilities** * Design, develop, and maintain backend services and APIs. * Build and support critical data interfaces, including **low\-latency real\-time streams (APIs, messaging)** and **high\-volume batch/file\-based data transfers**. * Develop and maintain **REST and GraphQL API integrations** connecting frontend applications with backend services. * Write clean, maintainable, and efficient code following best practices. * Perform **unit testing** and ensure high code quality. * Optimize applications for **performance, scalability, and reliability**. * Implement robust **error handling, caching, and data synchronization mechanisms**. * Troubleshoot and resolve complex technical issues with minimal supervision. * Collaborate effectively with **Business Analysts, Project Managers, and other development teams**. * Stay up to date with technologies and trends in the **payments and fintech industry**. ### **Requirements** * Bachelor’s degree in **ICT, Computer Science, or a related field**, or equivalent professional experience. * Strong experience with **Spring / Spring Boot**. * Solid expertise in **SQL / PL\-SQL**. * Hands\-on experience with **RDBMS databases** such as **Oracle or PostgreSQL**. * Experience building and integrating **REST or GraphQL APIs**. * Strong understanding of backend architecture and data processing. * Excellent **problem\-solving skills** and attention to detail. * Ability to work independently and manage tasks effectively. * Strong **English communication skills**. * Experience working in the **payments or fintech industry**. ### **Nice to Have** * Familiarity with **messaging systems or real\-time data processing**. * Experience with **performance optimization and scalability improvements**.