Senior QA Engineer (Automation Test/Agile/Scrum/SQL)

About Sun Group and DEC  Sun Group is behind Vietnam’s most iconic destinations, from Ba Na Hills to JW Marriott Phu Quoc, InterContinental Danang, and Sun World entertainment complexes. Beyond destinations, the Group has built a diverse ecosystem in Luxury Real Estate, Smart Infrastructure, Culture & Arts, and Aviation, shaping modern lifestyles across Vietnam.  At the core of this vision, the Digital Excellence Center (DEC) is Sun Group’s strategic hub for technology and innovation. DEC drives digital initiatives across tourism, hospitality, real estate, aviation, and entertainment; bridging Sun Group’s heritage of excellence with the future of digital-first experiences.  Job Summary  As a QA Engineer within the Platform teams, you will ensure end-to-end quality for AI-first E-Commerce and Digital Experience products. You will translate business requirements into clear test strategies, design and execute manual and automated tests, and drive fast, stable, secure releases at scale. In this role, you will collaborate closely with Product, BA, Engineering, DevOps/SRE, and Security to improve reliability, performance, and compliance across mission-critical user journeys. Responsibilities - Design and maintain test strategies and plans for web/mobile and API services; define scope, acceptance criteria, environments, and test data. - Create and execute manual and automated test cases (functional, integration, regression, smoke/sanity, UAT); apply risk-based and exploratory testing. - Test non-functionals: performance (load/stress/soak with JMeter/k6), basic security (OWASP awareness), compatibility (cross-browser/device, i18n/l10n), and accessibility. - Validate transactional flows - catalog, cart, checkout, payment, order, refund, loyalty—with attention to idempotency, data integrity, and error handling. - Log, prioritize, and track defects in Jira; verify fixes and prevent regressions. - Automate at the right layers (API/UI/component) and integrate into CI/CD with quality gates and clear reporting. - Monitor quality metrics (pass rate, defect density, escaped defects, flaky tests) and recommend improvements to reduce risk and time-to-release. - Partner with Engineering to refine acceptance criteria, improve testability/observability, and streamline the path to “production-ready.”