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 looking for a QA Engineer with experience in validating Java codebase migrations, specifically upgrading systems from Java 8 to Java 21.

This role is execution-focused and suited for QA engineers who can ensure system stability, correctness, and performance throughout the migration process. You will work closely with Backend Engineers and DevOps to validate changes, identify risks, and ensure production readiness.

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

In this role, you will get to:

Design and execute test strategies for Java migration (Java 8 → Java 21).
Validate functional and non-functional behavior of migrated services.
Identify edge cases and compatibility issues introduced during migration .
Develop and maintain automated test cases for API and backend services.
Perform functional, integration, and regression testing across the application.
Collaborate with Java Developers to understand code changes and define test scenarios.
Set up and maintain test automation infrastructure (test runners, CI integration, reporting).
Execute API testing using tools such as Postman, RestAssured, or similar.
Log, track, and support resolution of defects with clear root cause analysis.
Maintain test documentation, test cases, and validation reports.

You’ll be successful if you have:

2–4 years of experience in QA, test automation, or backend testing with at least 1–2 years in a Java-based testing environment.
Familiarity with Java and understanding of Java version differences (Java 8 to 21).
Strong experience in API testing and backend system validation.
Hands-on experience with test automation tools (Selenium, Playwright, or similar).
Familiarity with test management and defect tracking tools (Jira, TestRail, or similar).
Experience integrating automated tests into CI/CD pipelines (Jenkins, GitHub Actions, etc.).
Strong English communication skills both in written and spoken to communicate with the US team smoothly.
Willing to work remotely in the US time zones.

It’s Nice If You Have:

Experience testing REST APIs using tools like RestAssured, Postman, or similar.
Familiarity with performance/load testing tools (JMeter, K6 or similar).
Exposure to containerized environments (Docker, Kubernetes).
Understanding of logging, monitoring, and observability tools.
Experience working in fintech or high-transaction systems.

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!

QA Engineer (fixed-term contract)

TLDR

Who We Are

What We Do

Our Aspiration