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Sertis

Java Developer (fixed-term contract)

Bangkok, Thailand
contractor Remote

TLDR

Support the development and delivery of backend services for a payments platform while working independently and collaborating with cross-functional teams in a remote setup.

Who We Are  

Located in the heart of Bangkok’s Phrom Phong District, Sertis is ASEAN's leading Data and AI engineering and solutions company. Since 2014, our advanced solutions and products have powered over 400 enterprise Data and AI deployments at the region’s leading companies and conglomerates. We are also a member firm of Andersen Consulting, a global consulting practice integrating business strategy, digital transformation, and AI-driven technology solutions with Andersen Global’s world-class expertise.

What We Do  

Sertis provides both productized and bespoke AI and Data solutions for our Customers, optimizing and commercializing their data in ways that activate real business results. Our 140+ team have developed product offerings and IP ranging from advanced Computer Vision applications accredited Global Top 20 by NIST, to automated insights monetization for Retailers, eKYC for financial institutions, AI-driven agricultural safety assurance, precision steel cutting, trading algorithms for hedge funds, and enterprise knowledge management systems based on AI.

Our Aspiration 

We are data and AI pioneers, dedicated to enhancing the economic and social lives of our customers via technology.   We are not just living in history, we are making history everyday.  In becoming one of the world’s leading Data and AI companies, we always double-down on remaining a place where a diverse mix of talent wants to come, do their best work, and stay. We pride ourselves on bringing the best talent worldwide into a culture that encourages learning, growth opportunities, innovative contributions, and a sense of ownership. As part of Andersen Consulting, we are committed to delivering best-in-class Data and AI solutions—aligned with a global platform known for innovation, integration, and impact—while continuing to set benchmarks in the region and beyond.


For more information, please visit: sertiscorp.com

We are hiring a Java Developer, Backed Engineer (JVM ecosystem) to join to support the development and delivery of backend services for payments platform.

This role is execution-focused and suited for engineers who can operate independently, contribute to production systems, and deliver within defined timelines. You will work closely with engineering, product, and cross-functional teams to build and maintain services that are scalable, secure, and reliable.

*This is a fully remote role, working under US Time zone. 

 

In this role, you will get to:

  • Develop, refactor, and maintain Java-based backend services using Java (Java 8 to 21)
  • Build and maintain RESTful APIs and service integrations
  • Write clean, maintainable, and production-ready code aligned with engineering standards.
  • Work with frameworks such as Spring Boot within a microservices architecture
  • Participate in code reviews and contribute to improving code quality and team practices
  • Troubleshoot and resolve production issues with a focus on system stability
  • Collaborate with Product, Security and QA Engineers to support testing and fix defects promptly.
  • Contribute to system design discussions, including scalability, performance, and reliability
  • Communicate progress, blockers, and technical questions clearly with the US team.

 

You’ll be successful if you have:

  • 2–4 years of professional experience as a Java Developer, Backend Engineer
  • Great understanding of Java, be able to understand and work with legacy system (Java 8) while migrating to the modern one (Java 21) 
  • Solid understanding of modern Java features (Lambda expressions and Stream API, Functional programming concepts, Java Date and Time API)
  • Experience with Spring or Spring Boot frameworks
  • Familiarity with relational databases and SQL, experience with JPA/Hibernate is a plus.
  • Strong understanding of object-oriented design principles and common design patterns.
  • Experience building backend systems, APIs, and distributed services
  • Understanding of microservices architecture and service communication
  • Comfortable with Git workflows 
  • Strong English communication skills both in written and spoken communication with the US team.
  • Willing to work remotely under the US time zones.

 

It’s Nice If You Have:

  • Experience with messaging systems such as Kafka or RabbitMQ
  • Exposure to cloud environments (AWS, GCP, or similar)
  • Experience working in high-availability or high-transaction systems, ideally in fintech or payments
  • Experience with performance tuning and system optimization

What this opportunity offers

  • Fully remote position (work from anywhere under the US time zones)
  • Opportunity to learn modern Java practices on a real migration project with senior mentorship.
  • Collaborative and supportive team environment.

 

APPLY NOW!

 Sertis

Sertis is a leading Data and AI engineering company based in Bangkok, delivering tailored AI and Big Data solutions that drive growth and innovation across a variety of industries. With a track record of over 400 successful enterprise deployments, Sertis partners with major conglomerates in the region, combining technical expertise with strategic insight for impactful results.

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