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 to join a distributed team working on the migration of a legacy Java 8 application to a modern Java 21 codebase. You will write clean, efficient, and well-tested Java code, contribute to refactoring and modernization efforts, and work closely with senior engineers and the architect to deliver high-quality features.

This role requires daily collaboration with a US-based team via video calls, code reviews, and communication, so strong English skills are a firm requirement and working in US time zones.

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 as part of the legacy-to-modern migration.
Write clean, maintainable code following the architecture patterns and coding standards set by the team.
Participate in code reviews and provide constructive feedback to peers.
Implement unit tests and integration tests to ensure code quality.
Work with the Java Architect to understand technical direction and translate it into implementation.
Identify and resolve bugs, performance issues, and technical debt in existing code.
Collaborate with QA Engineers to support testing and fix defects promptly.
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
Great understanding of Java, be able to understand and work with legacy system (Java 8) while migrating to the modern one (Java 21)
Experience with Spring Boot or Spring MVC for building RESTful services.
Familiarity with relational databases and SQL, experience with JPA/Hibernate is a plus.
Understanding of unit testing frameworks such as JUnit 4/5 and Mockito.
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

Hands-on experience with a Java version migration project (e.g., Java 8 to 11, 17, or 21).
Experience with build tools: Maven or Gradle.
Basic familiarity with Docker or containerized environments.
Experience working in Agile/Scrum teams with tools like Jira or similar.

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!

Java Developer (6-10 months contract)