Software Development Engineer in Test (Contract)

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 an Software Development Engineer in Test to join our team, focused on validating a Java codebase migration. Unlike a traditional QA role, this position requires strong Java development skills, you will write, own, and maintain production-grade automation code, integrate test suites into CI/CD pipelines, and work as a technical peer alongside Backend Engineers and DevOps. You will also extend and maintain our existing automation framework running in Jenkins. *This is a fully remote role, working under US EST Time zone. In this role, you will get to: Design and implement test strategies for the Java 8 to Java 21 migration, covering compatibility, regression, and behavioral validation. Write and maintain automated test code in Java for API, backend services, and integration layers. Build, extend, and own our existing Java-based automation framework running in Jenkins. Set up and maintain CI/CD pipelines using Pipeline-as-Code (Groovy/Jenkinsfile). Validate functional and non-functional behavior of migrated services, identifying edge cases and compatibility risks. Perform API, integration, and regression testing across the application stack. Collaborate with Java Developers to review code changes, assess migration risks, and define test coverage. Manage and triage defects with clear root cause analysis and technical documentation. Maintain test documentation, test cases, and validation reports. You’ll be successful if you have: 2-4 years of Software Development in Test (SDET) , test automation engineering, or backend development experience, with at least 1-2 years writing automation in Java . Strong Core Java (JSE) skills, multithreading, collections, memory management; must write clean, maintainable test code, not just execute scripts. Solid understanding of Java version differences , including module system changes, deprecated APIs, and runtime behavioral differences. Hands-on experience building or extending automation frameworks Strong experience in API testing and backend validation using RestAssured, Postman, or similar tools. Hands-on Jenkins experience, writing and maintaining Jenkinsfiles, integrating test suites into deployment pipelines. Working SQL knowledge, writing and validating queries, understanding schema design, verifying data integrity in relational databases. Familiarity with test management and defect tracking tools (Jira, TestRail, or similar). Strong English communication skills (written and spoken) for collaboration with a US-based team. Ability to work fully remote under US time zones . It’s Nice If You Have: Experience in fintech or high-transaction systems (payments, ledgers, financial data pipelines). Familiarity with NoSQL databases and RDBMS interaction via application layers. Experience with performance/load testing tools (JMeter, K6, or similar). Understanding of logging, monitoring, and observability tools (ELK, Grafana, Datadog, or similar). Exposure to AI-assisted development tools applied in a testing or coding context. 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!