Bangkok, Bangkok Metropolis, Thailand Remote (Global) Contract

Sertis is hiring a Software Development Engineer in Test (Contract)

Responsibilities

  • 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.

Requirements

  • 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.

Nice to 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.

Benefits

  • 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.

Work Arrangement

Remote (Worldwide)

Additional Information

  • This is a fully remote role, working under US EST Time zone.
  • Contract
Required Skills
API TestingFintech
About company
Sertis

With over a decade of experience and 400+ successful corporate engagements, Sertis is the region’s most trusted partner for enterprise-grade AI and Data solutions. Founded in 2014, the company operates from its headquarters in Bangkok, Thailand, with additional presence in Indonesia, Hong Kong, and Singapore.

Its 130-member team works 100% on-premises, including a Data Science and Engineering division of over 80 experts, many holding PhDs and advanced degrees. Sertis has established two joint ventures and two spin-offs, reinforcing its leadership in AI-driven innovation.

Committed to cutting-edge research, Sertis ranks among the global NIST top 20 in Computer Vision, maintains an IEEE membership, and has contributed to over 120 academically published papers. The company delivers custom AI solutions, data analytics, machine learning, and computer vision products tailored to industries such as retail, manufacturing, energy, banking, security, and hospitality.

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Job Details
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Posted 3 days ago