Hire the Best Functional Testing Specialists

✅ 7+ years in Manual QA testing skills on WEB and Mobile devices. Windows/macOS and IOS/Android Usually, most common errors are related to UI/UX, Functionality, Cross-browser, API - these types of testing are what I specialize best. ✅I have experience in Software Testing: 🔸 Functional 🔹 Cross-browser / UI/UX (Browserstack, Xcode, Android Studio) 🔸 Integration/Module testing 🔹 Smoke, Sanity 🔹 API (Postman/SoapUi/Swagger) 🔸 Regression (TestRail, Google Sheets) 🔹 Usability / End to End testing 🔸 Re-testing 🔹 Exploratory ✅I have experience in test documentation development and maintenance (test case, test suite, bug report, checklist, test plan) ✅Also, I have an understanding of the full cycle of software development and testing processes using Agile Scrum or Kanban. ✅To find, describe and reproduce defects in software I use Jira, Trello, Pivotal Tracker. ⚠️In case if your project supports cross-platform usage, I have these devices: ✔️MacBook Air ✔️iPhone 14 ✔️Samsung Galaxy S8 Do not hesitate to contact me, if you have any questions. Hope to help your project with my skills.

🟨 Tested 20+ web & mobile products before release 🟨 Helping teams catch bugs early and avoid costly fixes later 🟨 Reduce production bugs by 50% I’m one of those QA tester specialists who doesn’t just “run tests” I look at the product like a real user and break it before your users do. What I do as a QA tester Manual QA tester / Software QA testing ✔️ Full-cycle software testing: regression, smoke, acceptance ✔️ Web testing, app testing (iOS / Android), cross-browser testing, quality assurance software ✔️ QA tester focused on real user flows, not just checklists ✔️ Clear bug reports in Jira QA automation / Automation tester ✔️ QA automation using Cypress and Playwright ✔️ Automation tester building stable end-to-end tests ✔️ QA automation engineer improving or rebuilding test coverage ✔️ Integration with CI (GitHub Actions, pipelines) ✔️ API testing with Postman and other tools I’m a QA engeneer (manual tester and automation tester) who works with products where bugs cost real money, SaaS platforms, marketplaces, business tools. My Tech Stack: ✔️ Cypress, Playwright, automation selenium Selenium, WebdriverIO ✔️ JavaScript, TypeScript, Python, Java ✔️ Postman, SoapUI ✔️ Jira, TestRail, X-Ray ✔️ BrowserStack, Sauce Labs ✔️ MySQL, PostgreSQL ✔️ OpenAI API, LangChain, HuggingFace I am a senior qa engineer, (automation engineer, qa automation engineer include manual testing) who focuses on modern, production-ready stacks and don’t take projects who need wordpress developer, react developer, front-end developer, full stack developers, project managers, python developer, react native developer, software developer, java developer, software product manager, Swift, python django, Angular, WordPress, Laravel, brazil, PHP, Vue, or Webflow, jest, design, gps, flutter, link building, copywriter, website traffic because my main focus is always on QA testing and product quality. Have a product that needs a QA tester or QA automation engineer? Click "Invite", send a short description, and I’ll show you where your product can break - before your users do

🚀 Transforming QA from a Bottleneck into a Business Advantage As a detail-oriented QA Engineer, I help B2B SaaS, complex fintech platforms, and fast-moving mobile startups accelerate their delivery cycles without ever sacrificing quality. By taking absolute end-to-end ownership of the testing process, I minimize post-release business risks, prevent revenue-impacting bugs, and ensure your software ships quickly as a stable, production-ready product. I understand that in Agile environments, speed is just as important as stability. My goal is to catch critical issues before they reach your customers, protecting your brand reputation and saving development time. 🔍 Comprehensive Quality Assurance: Manual & Automated With over 5,000 hours of Software Testing experience across 30+ platforms, I operate effectively as both a meticulous manual QA Tester and a highly technical QA Automation specialist. I don’t just check if a feature works on the sunny-day paths; I simulate complex user flows, dig into unintuitive areas, and rigorously validate edge cases to ensure your system doesn't break under real-world pressure. Whether I’m stepping in as an exploratory Tester or a strategic Automation Engineer, my approach guarantees a high-quality bar. I bridge the gap between user expectations and technical execution, providing a safety net for your engineering team. My Core Testing Methodologies: 🧪 Functional & Exploratory Testing: Navigating the app like a real user to uncover non-obvious logical errors and UX friction points. 🔄 Thorough Regression Testing: Ensuring that new code merges never break existing, legacy functionality. Every Test phase I run is structured and methodical. ⚙️ API Validation: Going beyond the UI. I inspect network requests, validate JSON responses, and ensure flawless backend-to-frontend data integrity using tools like Postman and Chrome DevTools. 📱 Mobile Device Testing: Validating responsive design, cross-platform UI consistency, network interruptions, and memory scenarios on actual iOS and Android devices. 🛠️ Technical Stack & Frameworks To provide maximum test coverage and efficiency, I build custom solutions and adapt quickly to your existing CI/CD pipelines. UI & E2E Automation: I write robust custom scripts in Python and JavaScript (using Selenium WebDriver, Pytest) and am highly adaptable to modern testing frameworks like Cypress and Playwright. Performance & Load: Using tools like Locust to stress-test your system, identify memory leaks, and verify infrastructure health under high concurrent loads. API Testing: Advanced Postman collections, REST/GraphQL validation, and deep log inspection. Management & Tracking: Mastery of Jira, Confluence, TestRail, and Hiptest for maintaining comprehensive test documentation. 📊 Proven Track Record & Project Ownership I've led QA teams of 4–8 specialists and managed the full quality lifecycle for highly demanding applications, from MVPs to high-load enterprise platforms: ☁️ SaaS & Enterprise B2B: Acted as the lead QA and Automation Tester, building automated pipelines from the ground up. I verified complex business logic, role-based access controls, and data processing for logistics platforms and real estate CRMs. 📈 Fintech & Trading: Handled full-cycle quality assurance for a high-stakes trading platform. I designed and executed complex test scenarios where accuracy and system reliability were non-negotiable. 📱 Native & Cross-Platform Mobile: Executed deep mobile app testing across iOS (Swift/TestFlight) and Android. I handled everything from API integrations and rapid user interactions to validating core posting flows and location-based features. 🏥 Compliance & Healthcare: Performed detailed API and performance testing in a regulated environment where precision and clear documentation are mandatory. 🤝 Seamless Workflow & Clear Communication I'm a strong believer that QA is a communication role as much as a technical one. I don't just wait for instructions — I act proactively. 📝 Actionable Bug Reports: I log defects directly in Jira with absolute clarity. My reports always include expected vs. actual results, severity ratings (Critical, Major, Minor), environment details, and exact, reproducible steps so your dev team doesn't have to guess or ask follow-up questions. 🗣️ Clear Communication: I collaborate closely with developers, product managers, and designers using clear written English to resolve ambiguities early in the sprint. ⚙️ Continuous Integration: I integrate a continuous feedback loop directly into your agile workflow to ensure stable mobile and web releases. If you're looking for a proactive professional who can hit the ground running, take ownership of your quality standards, and deliver bulletproof results, I'm ready to join your team. Let's connect and build something exceptional together!

👋 Hi there! I'm Tatjana, your friendly neighborhood QA Engineer 🕵️‍♂️. 🌟 Quality assurance is not just a job for me; it's a passion! I get a thrill out of hunting down those pesky bugs and ensuring that software shines like a star. 🌠 💡 Here's what you can expect from me: ✅ Years of experience in software testing. ✅ A keen eye for detail, nothing escapes my radar. ✅ A knack for creating robust test plans and test cases. ✅ An obsession with delivering top-notch, bug-free software. ✅ A friendly, collaborative approach – I'm here to make your project shine! 💻 What I bring to the table: 🕶️ Proficiency in various testing types, including functional, regression, and usability testing. 🧩 Expertise in test automation tools like Playwright and Cypress. 📈 Experience in working with Agile and Scrum methodologies. 🚀 Let's collaborate and ensure your software is as flawless as can be! Whether it's web or mobile apps, I'm here to help you achieve software perfection. Feel free to reach out, and let's chat about your QA needs. 📬 Ready to squash those bugs and take your software to the next level? Let's get started! 💪😊 Keywords: Automation Framework, Browser Automation, Software Development, API Testing, Healthcare, End-to-End Testing, Gaming, Test Management, Functional Testing, Mobile App Testing, Bug Reports, Bug Tracking & Reports, Test Case Design, Manual Testing, Usability Testing, Financial Services, Test Strategy, Education Technology, EdTech, Selenium, Travel and Hospitality, REST API, Media and Entertainment, Playwright, Logistics and Supply Chain, Desktop Application Testing, Microsoft Azure, Data Migration Testing, Quality Assurance, Creative Writing, Node.js, Social Media Marketing, HTML, Security and Defense, Automated Testing, Performance Testing, Regression Testing, Test Documentation, Database Architecture, Docker, UI/UX Prototyping, GitHub, C#, GraphQL, Web Testing, User Acceptance Testing, Government and Public Sector, TypeScript, Appium, PostgreSQL, Bug Reports, Azure DevOps, Test Case Execution, Web Scraping, Communication Skills, Quality Control, Exploratory Testing, Puppeteer, React, .NET Framework, E-commerce, Docker Compose, Java, Web Design, XCUITest, Agile Testing, Data Integration Testing, DevOps, Cloud Computing, Software as a Service, SaaS, Cybersecurity, IoT, Internet of Things, Cryptocurrency, Blockchain Technology, Artificial Intelligence, Machine Learning, Digital Marketing, User Experience (UX), User Interface (UI), Test Automation, Test Coverage, Risk-Based Testing, Test Scenarios, Incident Management, Cross-Browser Testing, Black Box Testing, White Box Testing, Acceptance Testing, Field Testing, Load Testing, Security Testing, User Journey Testing, Telecommunications, Real Device Testing, Manual Test Scripts, Manual Test Logs, Client-Side Testing, Feedback Mechanisms, Continuous Testing in Manual QA, Test Planning, Test Environment Setup, Sanity Testing, Smoke Testing, Integration Testing.

I’m a passionate QA tester who loves breaking applications (only to make them stronger and better). I focus on exploring apps the way real users do, finding bugs, usability issues, and performance gaps before they reach production. With 7+ years of strong experience in Manual plus Auomaion testing and quality assurance for web and mobile applications. I focus on identifying real user issues, validating complex workflows, and ensuring applications are stable, user-friendly, and production-ready. I have worked with SaaS platforms, business applications, and customer-facing systems where accuracy, usability, and reliability directly impact business success. My strength lies in detailed exploratory testing and end-to-end workflow validation that helps uncover hidden defects before release. ------------------------------------------------------------------------------------------------ I Can Help You With ✅ Web Application Testing ✅ Mobile Application Testing ✅ SaaS Platform Testing ✅ Business Workflow Validation ✅ Dashboard & Admin Panel Testing Manual Testing Expertise ✅ Functional Testing ✅ Regression Testing ✅ Smoke & Sanity Testing ✅ Exploratory Testing ✅ UI/UX & Usability Testing ✅ Black Box & Grey Box Testing ✅ Integration & System Testing ✅ End-to-End Workflow Validation ✅ Compatibility & Cross-Browser Testing ✅ User Acceptance Testing (UAT) ✅ Backend & Database Validation ✅ Security & Negative Testing Automation & API Testing (Supporting Skill) ✅ Automation using Cypress, Playwright & Selenium ✅ API testing using Postman ✅ Automation support for regression and critical flows Core Strengths ✅ Strong attention to detail and defect identification ✅ Deep understanding of user behavior and workflow testing ✅ Clear and structured bug reporting with screenshots and recordings ✅ Strong experience working in Agile and Scrum environments ✅ Ability to quickly understand business requirements and convert them into test scenarios ------------------------------------------------------------------------------------------------ 🌟 Why Clients Choose Me ⭐ Detail-Oriented Testing Approach I focus heavily on real-world usage testing to ensure software works smoothly for end users. ⭐ Clear Communication & Reporting I provide detailed, easy-to-understand bug reports that help development teams resolve issues faster. ⭐ Reliable & Deadline Focused I consistently meet testing deadlines while maintaining high testing standards. ⭐ Flexible Across Industries Experienced in testing SaaS platforms, dashboards, and business workflow applications. 𝐈’𝐦 𝐧𝐨𝐭 𝐣𝐮𝐬𝐭 𝐚 𝐐𝐀 𝐭𝐞𝐬𝐭𝐞𝐫 — I’m a quality advocate, problem-solver, and product perfectionist who treats every application as if it were my own. My mission isn’t just to find bugs — it’s to build confidence in your product and deliver excellence in your brand. ------------------------------------------------------------------------------------------------ Ket experties: Manual Testing, Software Testing, Quality Assurance, QA Engineer, Functional Testing, Regression Testing, Exploratory Testing, Smoke Testing, Sanity Testing, UAT Testing, Web Application Testing, Mobile Application Testing, SaaS Testing, Cross Browser Testing Responsive Testing, UI Testing, UX Testing, Usability Testing, Compatibility Testing, Integration Testing, System Testing, End-to-End Testing, Database Testing; SQL Validation, Bug Reporting, Test Case Writing, Test Scenario Design, Agile QA, Scrum Testing, Backend Testing, Frontend Testing, Security Testing, Negative Testing, Black Box Testing, Grey Box Testing

Key Achievements: 🏆 Top-Rated freelancer with 5+ years of professional QA experience 📌 Lots of Upwork projects successfully completed 🤖 5+ AI platforms tested 🚀 Tested and launched 10+ startup products successfully to the store ⏰ Worked over thousands hours on Upwork. As a QA Engineer with 5+ years of experience in Software Quality Assurance, I help teams present stable, user-friendly, and reliable products across web, mobile, and desktop platforms. My focus - understanding user behavior, business logic, and edge cases that impact real users. I’ve worked on products at different stages (startup to scaling), collaborating closely with developers and product teams to ensure high-quality releases. 🧪 Core QA Expertise ✅ Manual QA & Functional Testing • Functional, Regression, Smoke & Exploratory Testing • End-to-End User Flow Validation • UI/UX & Usability Testing • Acceptance & Integration Testing • Cross-Browser & Cross-Device Testing • Mobile App Testing (iOS & Android real devices) • Desktop Application Testing • Payment Flow & Form Validation • Edge Case & Negative Scenario Testing 🤖 Automation Testing • UI Automation with Cypress, Selenium, Playwright • JavaScript-based test scripting • Automation of critical user flows • Regression test coverage support 🔌 API & Data Testing • API Testing with Postman • Basic backend & data validation • Understanding of databases & data structures 🛠 Tools & Collaboration • Bug Tracking: Jira, Trello, Asana, Linear • Test Documentation: Test Cases, Checklists, Test Plans • Browsers & Devices: Chrome, Firefox, Safari + real iOS/Android devices • Collaboration&reporting: Slack, Google Docs / Sheets • CI-friendly testing mindset 🧠 How I Work ✔ Think like an end user, not just a tester ✔ Write clear, actionable bug reports with expected vs actual results ✔ Prioritize issues by risk and business impact ✔ Adapt quickly to fast-changing products and requirements ✔ Communicate clearly and proactively with teams ⭐ Why Choose Me? ✔ 5+ years of professional QA experience ✔ Strong mix of manual + automation skills ✔ Detail-oriented with a product-focused mindset ✔ Comfortable working independently or within Agile teams ✔ Flexible availability and quick onboarding ✔ Goal-driven 🔑 Related Keywords Manual QA, Automation Testing, Web Testing, Mobile App Testing, iOS QA, Android QA, API Testing, Postman, Cypress, Selenium, Playwright, Regression Testing, Exploratory Testing, End-to-End Testing, UI/UX Testing, Bug Reporting, Jira, Quality Assurance, Software Testing, Test Case Design, Acceptance Testing