Mateen I.

Top Rated full-time freelancer Manual QA Tester (Engineer) with over 5 years of experience in Software Quality Assurance, specializing in manual testing, functional and regression testing, cross-platform mobile and web application testing, API testing, workflow validation, and SaaS application QA. Extensive experience testing AI Voice & Chat Assistant platforms including Retell, Senior Care AI, and more, along with marketplaces, booking systems, and enterprise applications. 🌟 Why Clients Hire Me I am a Full Stack QA Automation Engineer (SDET) who bridges manual exploration and reliable automation. I validate user journeys, API contracts, and performance bottlenecks. Then I automate the critical paths so your development team moves faster without quality tradeoffs. I hold a Top Rated badge on Upwork with 400+ billed hours and 15+ satisfied clients (enterprise to startup). As a former QA Lead, I have interviewed 50+ candidates and built QA labs from scratch in two organizations. I deliver enterprise‑grade testing at startup speed. 𝗪𝗵𝗮𝘁 𝗜 𝗧𝗲𝘀𝘁 • SaaS platforms, dashboards, and complex web applications • iOS and Android mobile applications (native, hybrid, and real-device testing) • Registration, onboarding, authentication, and account recovery flows • User roles, permissions, access control, and administrative workflows • Subscriptions, billing, checkout, invoicing, and payment gateways • REST APIs, GraphQL endpoints, and third-party integrations • CRM, ERP, and business workflow systems • AI applications, chatbots, and conversational workflows • Voice AI and speech-based user journeys • Responsive layouts and cross-browser compatibility • Performance and load behavior under real-world conditions 𝗠𝘆 𝗤𝗔 𝗣𝗿𝗼𝗰𝗲𝘀𝘀 • Understand the product, users, requirements, and release risks • Create test scenarios and test cases around critical workflows • Validate happy paths, negative cases, and real-world edge cases • Document defects with severity, reproduction steps, evidence, and environment details • Retest fixes and execute regression testing • Provide a clear release-readiness summary • Collaborate closely with developers and product teams in Agile/Scrum environments 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗖𝗮𝗽𝗮𝗯𝗶𝗹𝗶𝘁𝗶𝗲𝘀 • Manual and functional testing • Regression and smoke testing • End-to-end and exploratory testing • User acceptance testing (UAT) • API and integration testing • Mobile and real-device testing • Cross-browser and responsive testing • Usability and UI/UX validation • Payment gateway testing • Test-case design and execution • Bug reporting and defect management • Release and production-readiness testing • Performance and load testing with JMeter For stable and repeatable workflows, I can also support regression automation using Cypress and Selenium. 𝗪𝗵𝗮𝘁 𝗬𝗼𝘂 𝗥𝗲𝗰𝗲𝗶𝘃𝗲 • Detailed and actionable bug reports • Clear steps to reproduce each issue • Screenshots and screen recordings • Severity and priority classification • Test cases and execution reports • Regression and retesting summaries • Usability and workflow feedback • Clear communication with developers and product teams 𝗧𝗼𝗼𝗹𝘀 Jira, TestRail, Xray, ClickUp, Postman, Swagger, BrowserStack, JMeter, Cypress, Selenium, Trello, and Asana. 𝗣𝗿𝗲𝗽𝗮𝗿𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮 𝗹𝗮𝘂𝗻𝗰𝗵, 𝗿𝗲𝗹𝗲𝗮𝘀𝗲, 𝗼𝗿 𝗺𝗮𝗷𝗼𝗿 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝘂𝗽𝗱𝗮𝘁𝗲? Send me your application link, supported devices, release timeline, and the workflows that matter most. I’ll help you identify the highest-risk areas, structure the right testing approach, and give your team a clearer view of whether the product is genuinely ready for users. 𝗖𝗼𝗿𝗲 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 QA Engineering, Manual QA, Software Testing, Functional Testing, Regression Testing, Web Application Testing, Mobile App Testing, SaaS Testing, API Testing, Postman Testing, AI Testing, Chatbot Testing, Voice AI Testing, Payment Gateway Testing, Cross-Browser Testing, User Acceptance Testing, Test Case Design, Bug Reporting, Exploratory Testing, Cypress, and Selenium.