Java Software Engineer (Senior) - Strong AI Integration

Posted Yesterday
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Hồ Chí Minh, VNM
In-Office
Senior level
Digital Media • Information Technology • Software
The Role
Design, develop, and maintain scalable Java backend services using Spring Boot and microservices. Integrate LLMs, AI services, and agent workflows with internal systems, databases, and business applications. Build APIs and integration logic while ensuring performance, security, reliability, and scalability. Contribute to architecture, code reviews, troubleshooting, and technical improvements, and mentor junior engineers.
Summary Generated by Built In
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

  • Recognition & Rewards:
    • 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

Skills Required

  • Bachelor's degree in Computer Science, Information Technology, Software Engineering, or a related field
  • At least 6 years of Java backend development experience
  • Strong proficiency in Java and Spring frameworks, including Spring Boot and JUnit
  • Experience with RESTful APIs and microservices architecture
  • Experience with cloud platforms and cloud-based application development, including AWS, Azure, or GCP
  • 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
  • Strong problem-solving, communication, and cross-functional collaboration skills
  • Good English communication skills
  • Familiarity with AI agent workflows, tool or function calling, and LLM orchestration frameworks
  • Experience with Docker, Kubernetes, and CI/CD
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The Company
HQ: Ballerup
84 Employees
Year Founded: 2009

What We Do

EPOS, founded in 2009, is a leading Point-Of-Sales (POS) system vendor. We aim to provide SMEs powerful yet cost-effective digital solutions. Our systems are used in over 60 different industries, including major Singapore government agencies and MNCs. We have an active and strong team capable of flexible customisation requirements and handling of major projects (e.g. major clients will have 50-60 outlets, with more than 100 POS terminals). Our clients include LTA, KKHospital, Popular Bookstore, UMart, Bounce Inc. We are a team that is truly passionate about helping businesses succeed. We want to see our customers thrive, and to expand and grow their business as ours.

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