Principal Java Engineer - Based in Da Nang

12026-04-02
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Orient Software is a professional software development company and a trusted AI & data partner, delivering tailored solutions that enable businesses to grow and innovate. Established in 2005, with offices across four major cities in Vietnam (Ho Chi Minh City, Da Nang, Hanoi, and Hue), Japan and Singapore as well, we provide scalable engineering capabilities through a globally integrated delivery model. Our vision is to become an internationally recognized technology corporation, delivering innovative solutions powered by world-class expertise.

At the core of everything we do are our values — Collaboration, Openness, and Learning Mindset, which shape our culture, strengthen our people, and drive sustainable success for our clients worldwide.

Responsibilities

  • Lead the technical design and architecture of scalable microservices and APIs that support LLM-driven and platform features.
  • Drive the evolution of our microservice and event-driven architecture, ensuring system scalability, reliability, and performance.
  • Provide technical leadership and guidance to the engineering team through architecture reviews, code reviews, and technical mentoring.
  • Collaborate closely with Product, Engineering, and DevOps teams to define technical solutions aligned with business goals.
  • Design and oversee the development of retrieval-augmented generation (RAG) pipelines, including document ingestion, embedding generation, vector indexing, and retrieval APIs.
  • Ensure high engineering standards through clean code practices, testing strategies, and maintainable system design.
  • Champion DevOps and “you build it, you run it” culture, including CI/CD pipelines, infrastructure automation, containerization, and reliable deployment practices.
  • Monitor system performance, identify technical risks, and drive continuous improvements in system architecture and engineering processes.
  • Maintain required working-hours overlap (at least 5 hours) with the Berlin / Central Europe time zone.
  • Contribute as a hands-on technical leader within a multinational Agile development team.

Requirements

  • 7+ years of experience in backend development with strong expertise in Java (Java 8+), Spring, Spring Boot, and modern backend architectures.
  • Proven experience leading the design and development of large-scale distributed systems or microservices architectures.
  • Strong experience with message brokers such as Apache Kafka or RabbitMQ.
  • Solid understanding of API design (REST), streaming technologies (SSE/WebSockets/gRPC), and event-driven architecture.
  • Hands-on experience with containerization and orchestration (Docker, Kubernetes) and modern CI/CD pipelines.
  • Deep understanding of database systems and caching strategies, including PostgreSQL/MySQL, Redis/Memcached, and at least one NoSQL database (e.g., MongoDB, DynamoDB).
  • Experience establishing engineering best practices, code quality standards, and testing strategies (unit, integration, functional testing).
  • Strong problem-solving, technical leadership, and mentoring skills.
  • Excellent communication and collaboration skills.
  • Fluent in English.

Nice to have:

  • Experience working with AI/LLM systems or RAG architectures.
  • Knowledge of AI model evaluation, prompt testing, and A/B testing frameworks.
  • Experience implementing Domain-Driven Design (DDD) in large-scale systems.
  • Familiarity with Helm charts and Kubernetes ecosystem

What we offer

  • Attractive and competitive performance-based compensation package.
  • Full gross salary during probation.
  • Generous 13-month salary and dedication bonus.
  • Comprehensive healthcare insurance package and annual health check-ups.
  • Flexible check-in time before 10:00 AM on weekdays.
  • 1-day remote work per week.
  • 12 annual leave days, 5 sick leave days, 11 public holidays as required by Vietnamese Labor Law, plus one extra day off for Christmas.
  • Opportunity to work on global projects, collaborate with international teams.
  • Daily breakfast (first come, first served), Happy Thursday gatherings to connect with colleagues.
  • Active sport clubs such as badminton, running, football, music clubs.
  • Teambuilding activities, annual company trips, and year end party.
  • Continuous learning opportunities through technical & soft skills training, English classes, and internal communities.
  • Financial assistance for important life events, including marriage, childbirth, and bereavement, ensuring support at every stage of life.

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