Leong Mei Sum
50 yrs oldTarget Roles
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Professional Summary
Senior Software QA Engineer with extensive hands-on experience in web, mobile, API, and backend testing. Skilled in functional, regression, integration, exploratory, SIT, UAT, and end-to-end testing within Agile environments. Experienced in production issue investigation, defect analysis, release validation, and API testing using Postman, API Playground, and Apidog. Hands-on experience with automated regression testing using Testim, Playwright test script generation, basic SQL, and production troubleshooting using PostHog, TrackJS, and Datadog. Strong analytical and problem-solving skills with a focus on software quality, business requirements, and user experience.
Technical Skills
Education
Bachelor's Degree
Experience
5+ Years (Senior)
Notable Projects
Supported end-to-end quality assurance across multiple product launches at Deriv, covering the evolution from a legacy web application to the V2 platform. Performed functional, regression, integration, SIT, UAT, API, and end-to-end testing across web, mobile, and backend systems, including payment gateway and payment flow testing. Investigated production and client-reported issues using PostHog, TrackJS, and Datadog, while maintaining automated regression coverage using Testim and supporting Playwright test script generation. Collaborated with developers, Product Owners, and cross-functional teams to identify issues, verify fixes, and support successful releases.