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Java Architect (fixed-term contract) at Sertis. . Location: Bangkok, Bangkok Metropolis, Thailand. 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’re looking for a hands-on . Java Architect. to lead the migration of legacy systems from Java 8 to Java 21.. . This role focuses on defining the migration approach, architecture decisions, and technical direction, while working closely with engineers to ensure smooth execution and system stability.. . *This is a. fully remote role. , working under US Time zone. . .  . . In this role, you will get to:. . . . Analyze and migrate existing Java 8 codebases to Java 21 . . Review and refactor legacy code to align with modern Java standards. . Identify and resolve . compatibility and dependency issues. . Ensure . system stability, performance, and backward compatibility. . Guide engineers on best practices and modernization approach. . Collaborate with DevOps on . build, CI/CD, and deployment. . Optimize performance (JVM tuning, memory, scalability). . Support troubleshooting during and post-migration. . .  . . . You’ll be successful if you have:. . . . 4+ years of experience in backend development using Java. . Strong . hands-on experience with Java 8 . and exposure to newer versions (Java 11, 17, or 21). . Experience . working on Java upgrade or migration projects is strongly preferred . . Solid understanding of modern Java features . (Lambda expressions and Stream API, Java Date and Time API, Optional and null safety practices). . Experience with Spring or Spring Boot frameworks. . Familiarity with dependency management tools (Maven or Gradle). . Strong understanding of object-oriented design principles. . Experience with REST APIs and backend service development . . Familiarity with version control systems such as Git . . Strong debugging and problem-solving skills. . Ability to work independently with clear ownership of tasks . . 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 migrating large or legacy systems to modern Java versions. . Familiarity with microservices architecture. . Exposure to containerized environments (Docker, Kubernetes). . Experience working in fintech or high-transaction systems. . Understanding of performance tuning and JVM 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!