Java Software Engineer (Senior) - Strong AI Integration

About EPOS Vietnam Established in 2009, EPOS Vietnam serves as the technical hub of EPOS Singapore, a leading provider of cutting-edge Point-of-Sale (POS) and SaaS solutions. Backed by Ant International — a global leader in digital payments and financial technology — we play a pivotal role in developing innovative, scalable, and user-centric digital solutions that power EPOS products.

Our technologies enable thousands of SMEs in Singapore, and with ongoing expansion plans across Asia, to digitize and grow their operations through cost-effective and reliable platforms. At EPOS Vietnam , we cultivate a collaborative and dynamic culture driven by innovation and a passion for transforming businesses through technology.

Join us to shape the future of digital solutions across Asia and beyond! Key Contributions Design, develop, and maintain scalable Java backend services using Spring Boot and microservices architecture . Collaborate with AI Engineers to integrate LLM-powered solutions and AI agents into EPOS’s existing systems and business workflows.

Develop APIs, backend components, and integration logic to connect AI services with internal systems, databases, and business applications. Build and enhance AI agent workflows , including tool calling and multi-step execution, where required. Ensure the performance, reliability, security, and scalability of AI-integrated backend services in production.

Troubleshoot integration issues, and maintain high standards of code quality and system maintainability. Contribute to system architecture , code reviews, and technical improvements while mentoring junior engineers.

Requirements

Bachelor’s degree in Computer Science / Information Technology / Software Engineering, or a related field. At least 6 years of experience in Java backend development, with strong proficiency in Java, Spring frameworks (Spring Boot, JUnit, etc) , RESTful APIs, and microservices architecture . Solid experience with Cloud platforms (AWS, Azure, GCP) and cloud-based application development.

Solid understanding of system design, API integration, distributed systems, and production-grade software development. Hands-on experience integrating LLMs, AI services, or AI agents into applications or backend systems. Familiarity with AI agent workflows , tool/function calling, and LLM orchestration frameworks is a plus.

Experience with cloud platforms, Docker, Kubernetes, and CI/CD is an advantage. Strong problem-solving, communication, and cross-functional collaboration skills. Good English communication is mandatory.

Benefits

We are a multinational, product-driven company specializing in proprietary POS solutions — developing in-house and delivering directly to our worldwide customers.

Benefits

Performance Bonus (subject to the company’s business results and the employee’s performance evaluation) Biannual Performance Review and Salary Adjustment Comprehensive Insurance Coverage: Full government public insurance contributions based on gross salary Premium health insurance from Liberty Insurance Annual health check Clear career development and growth structure; Training sessions and Learning workshops 14 days of annual leave and one additional day of leave for every year of service Laptop/MacBook and top-notch facilities are provided based on each role Agile/Scrum-based internal workflows for efficient and collaborative development Company trips, parties and regular team-building activities; Weekly happy hour, coffee, snacks, and board games Working Environment & Culture International Workplace: English-speaking environment Positive and Open-Minded Culture: Engineers are encouraged to propose innovative solutions that enhance productivity and code quality 1-on-1 Mentorship: Monthly coffee sessions with managers offer personalized feedback, goal setting, and career development opportunities Flexible Working Hours: Promote work-life balance and individual productivity