Hire the Best User Acceptance Testing Specialists

✍🏻 Are you in search of a highly skilled Software QA Engineer with expertise in Performance testing, Performance engineering, Automation testing, Load testing, and Security testing? Look no further! With over 15+ years of experience in the QA industry, I have a proven track record of delivering exceptional software quality solutions to clients. My specialization lies in Performance testing, where I ensure that applications perform optimally, handle high loads, and deliver seamless user experiences. ⭐QA Services ⭐ ✅ Performance Testing ✅ Automation Testing ✅ Security/Penetration Testing ✅ Functional Testing/Regression/Acceptance Testing ✅ Usability Testing ✅ Mobile App Testing (IOS / Android) ✅ Strong knowledge of HTML, CSS and SQL, Python, and Java programming ✅ User Acceptance Testing ✅ API Testing ✅ Experience in SOAP API / REST API/ GraphQL 🛠️ Tools Expertise : ✅ ️Performance testing: JMeter, LoadRunner, Neoload, Gatling, Blaze Meter and K6 ✅ ️Web Automation : Selenium WebDriver, WebDriver.IO, ✅ Defect Tracking Tool: JIRA, Bugzilla, Test Rail ✅ ️Mobile testing: Appium ✅ Monitoring Tools: Dynatrace, AppDynamics, DxApm, Introscope, and Net Diagnostics ✅ Cloud Server Monitoring: AWS Could watch, Open Shift Container, GCP ✅ Data visualization: Splunk, Kibana ✅ Load Generator : Redline13, Balzemeter, LR ✅ ️API testing: Postman, Swagger, Insomnia, Fiddler ✅ ️Cross-browser testing: Browser Stack, Sauce Labs ✅ ️Version Control: Git, Github, GitLab, Bitbucket, Perforce ✅ ️Databases: MongoDB, SQL, MYSQL, Oracle ✅ ️CI/CD: Jenkins, Azure DevOps, Bamboo ✅ ️Build Management: Ant, Maven, Gradle ✅ ️Frameworks: Cucumber, TestNG, JUnit, Mocha, Jasmine ✅ ️Programming knowledge: Java, HTML, JavaScript, Python ➰ Performance Testing Framework ➰ ✅ ️JMeter + Perfmon+ Jenkins ✅ ️JMeter + Jenkins + Grafana ✅ ️JMeter + InfluxDB ✅ ️JMeter + RedLine13/BlazeMeter ⭐ Domain Knowledge ⭐ 📌 E-commerce and retail 📌 Healthcare and medical devices 📌 Finance and banking 📌 Gaming and entertainment 📌 Education and e-learning

Bugs found before launch save thousands in fixes after. I help startups and product teams ship cleaner software by catching critical issues early — before real users do. What I deliver: → Detailed bug reports with clear reproduction steps → Structured test cases for web & mobile apps → Fast turnaround with clear communication Tools: Jira, Trello, TestRail | Certified in Software Quality Engineering Ready to test your product? Let’s talk

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

⭐️ Highly skilled QA Engineer with over 9 years of experience in various types of testing, including web, mobile, and desktop platforms. Proficient in creating test documentation, working with Agile methodologies, and utilizing a wide range of testing tools and frameworks. ⭐️Top Rated Plus freelancer⭐️ 100% Job Success 📌Summary of Skills: * Manual Testing Mobile Applications (Android & IOS with Testflight installed) * Manual Testing of Desktop Software and Web-based Software * Excellent bug finder with a good eye for details, receiving awards and bonuses * Document creation (Test plan, test case, test script, test scenario, user's manual) * Report Bugging Documentation * Project Handover Documentation * Worked on Agile Methodologies 📌Scope of Testing: * Manual Testing (Functional testing such as smoke and sanity testing, regression, usability, alpha-beta, positive and negative, GUI, exploratory, API, and end-to-end testing) * Mobile Apps Testing * Game app testing(mobile/desktop) * Cross-browser Testing * UI/UX Testing/Feature suggestion * Test media platforms such as Roku, Visio, Tizen, Apple TV, Fire TV, and Android TV - 5 years of experience 📌Technical Experience: * Platforms: Windows XP, Windows 7, Windows 10 * Database: MySQL * Remote Applications: TeamViewer, Remote Desktop Application * Defect Tracking and Management Tools: JIRA, Trello, X-Ray, Excel, Youtrack, Zephir, Mantis * Other software/tools: Browserstack, Google Apps, Dropbox, Postman, Slack, Microsoft Teams * Microsoft Applications and documentation tools 📌Devices: * Android - Xiaomi mi 9t PRO * iPhone XR, iPhone 12 plus, iPhone 13 (TestFlight ready) * Tablet - iPad 8 gen * Apple TV * Google Chromecast ⭐️ Why you should choose me over another freelancer ⭐️ - I provide high-quality and professional work so that the customer has a positive experience of working with me, is satisfied with the result, and wants to come back to me next time with a new job offer. - I believe that my passion for testing and ability to learn, adapt to new challenges, and grow make me a strong competitor. Have any questions or want to discuss your projects? Please do not hesitate to contact me. Let’s get started! Cheers! ------------------------------------------------------------------------------------------------ Keywords: Quality Control, Manual Testing, Quality Assurance, QA Testing, Web Testing, Bug Reports, GUI Testing, UI Testing, Software QA, QA Engineering, Desktop Application Testing, Functional Testing, Non-functional, Software Testing, Web App Tester, Usability Testing, User Acceptance Testing, Defect Tracking, Test Reporting, Test Plan, Test Case, Data Testing, Website Testing, User Story, Beta Tester, Stability/Reliability testing, Compatibility testing, Black box Testing, Cross-Browser Testing, Cross-Device Compatibility, Retesting, Front End Testing, Accessibility testing, Web Content Accessibility Guidelines (WCAG).

40+ Hours Available Per Week As a Top Rated Plus full-time freelancer on Upwork with over 8+ years of expertise in Software Quality Assurance, I specialize in ensuring your applications are bug-free and deliver exceptional user experiences, backed by over 225+ 5-star ratings ⭐ from satisfied clients! 🚀 With 26,800+ hours work on Upwork, I have successfully tested 310+ Android and iOS mobile applications and over 120+ web apps, helping clients achieve seamless product launches and exceptional performance. My experience includes collaborating with renowned organizations like UNICEF and leading brands like Samsung, ensuring their software meets the highest quality standards. I test applications across all types of network conditions, including 3G, 4G, and 5G, as well as high-speed connections (1Gbps) and low-speed scenarios down to kilobits per second (kbps), ensuring optimal performance and usability under real-world conditions. Key Achievements: 🏆 Top Rated Plus freelancer with 8+ years of professional QA experience ⭐ 225+ 5-star reviews from satisfied clients 📌 300+ Upwork projects successfully completed 🤖 10+ AI Voice & Chat Assistant platforms tested (Retell, Bland, Vapi, Wishpond AI, Senior Care AI, etc.) 🚀 Tested and launched 70+ startup products successfully to the store ⏰ Worked over 26,800+ hours on Upwork. 📱 Android: Samsung Galaxy S24 Ultra, Samsung Galaxy S21 Plus, Poco X4, RealMe GT Master Edition, OnePlus 9, OnePlus 8T, Samsung A18 📱 iOS: iPhone 16 Pro Max, iPhone 14 Pro Max, iPhone 14 Plus, iPhone 13 Pro Max, iPhone 11, iPhone XR 💻 Desktop: MacBook Air, HP Pavilion X360, RealMe Book, Lenovo ThinkPad, Samsung Galaxy Book 4 & 5 Manual QA Skills: • AI Model Performance Testing • AI Agent Functional & Usability Testing • Conversational AI & Chatbot Testing • Requirement Analysis • Test Case Design & Execution • Defect Reporting & Management • SEO Testing • Functional Testing • End-to-End Testing • Integration Testing • Exploratory Testing • PWA Testing (Progressive Web App Validation) • Reverse Testing – Test with Invalid/Unexpected inputs to ensure robust error handling & stability • Regression Testing • Cross-Browser Testing • Mobile App Testing (iOS & Android) • Usability Testing • UI/UX Testing • Payment Gateway Testing • System Testing & Acceptance Testing • API Testing (Postman, Swagger) • Performance Testing (Basic manual approach using tools) 🤖 AI Testing Expertise • AI Model Performance & Response Accuracy Validation • Conversational Flow, NLP Intent & Entity Testing • Voice Agent Quality Testing (ASR, TTS, Latency, Filler Word Detection) • Knowledge-Base and Prompt Flow QA • Context Retention & Session Continuity Testing • Multi-Agent Coordination and Voice Call Testing • Real-World AI App Testing (Retell, Bland, Vapi, ElevenLabs, Play.ht, Wishpond AI, Senior Care AI) Tools & Platforms: • Bug Tracking & Management: JIRA, Trello, Asana, Linear, ScribeHow • Collaboration & Reporting: Google Sheets, Notion, Slack • Testing Platforms: BrowserStack, physical devices • Performance & Analytics Tools: GTmetrix, SimilarWeb • Documentation: Test Plans, Test Cases, Checklists, FRS, User Manuals Domains Expertise: • eCommerce (Shopify, WooCommerce) • SaaS Applications • Healthcare • Mobile Applications • Insurance • Banking & Financial Services • Gaming • Point of Sale (POS) • ERP Systems • OpenAI Integration With a strong commitment to delivering error-free, high-performing software, I aim to exceed quality expectations and provide products that users love. I am available for flexible timings across any time zone and dedicated to helping you bring your software to the highest standards of performance and user satisfaction. Why Choose Me? ✔️ Proven expertise in Manual QA testing ✔️ Comprehensive experience across web and mobile platforms ✔️ Skilled in test documentation, ensuring a structured and repeatable testing process ✔️ Ability to identify critical defects and edge cases ✔️ Adaptable to both Agile and Waterfall methodologies ✔️ Flexible work hours to meet your project needs ✔️ Expert in crawling websites to ensure flawless functionality and SEO perfection -------------------------------------------------------------------------------------------------------- Related Keywords: Manual Testing, API Testing, Web Testing, Mobile App Testing, Regression Testing, Cross-Browser Testing, Test Case Design, Jira, UI/UX Testing, End-to-End Testing, Functional Testing, Bug Reports, Quality Assurance, Payment Gateway Testing, iOS Testing, Android Testing, Test Plan, Usability Testing, User Testing, Software Testing, Manual QA, AI Testing, Chatbot Testing, Voice AI Testing, NLP Testing, Mobile App QA, Conversational AI, AI Model Evaluation, Reverse Testing, PWA Testing, Progressive Web App Validation, AI Apps Testing, Progressive Web Application, OpenAI, AI Apps, ChatGPT, Sora, Gemini, Generative AI, Chatbot

⭐️⭐️⭐️⭐️⭐️ Upwork Client Feedback "Working with Yasir was a great experience. His attention to detail and communication made testing my app much easier. He also brought valuable insights on how to improve the workflow. I strongly recommend Yasir's services." 🏆 100% Job Success Score on Upwork Are you looking for a QA Tester who finds critical bugs before your users do? I help startups, SaaS companies, and product teams deliver stable, high-quality web and mobile applications through structured Manual and Automation Testing, including AI-based platforms and real-device mobile testing. With 5+ years of QA experience and 50+ tested applications across web, mobile, and AI platforms, I bring both technical precision and clear communication to every project. What I Can Help You With: ✔ Manual Testing — Functional, Regression, Smoke, Exploratory, UAT and Usability Testing ✔ Playwright Automation with reusable test scripts and detailed reports ✔ API Testing and validation using Postman for REST APIs, endpoints and response checks ✔ Mobile App Testing on real Android and iOS devices ✔ AI App Testing for Chatbots, Voice Assistants and Conversational AI platforms ✔ Cross-Browser and Cross-Platform Testing via BrowserStack ✔ Web Application Testing for SaaS, E-commerce, WordPress and Shopify platforms ✔ Detailed bug reports with screenshots, videos and clear reproduction steps ✔ Test case writing, test planning and full QA documentation in JIRA Real Devices I Test On: 📱 iOS — iPhone 14 Plus, iPhone 14, iPhone 12 Plus 📱 Android — Samsung A35, Samsung A51, Vivo V21 💻 Laptops — HP G6, MacBook Why Work With Me: ✔ 100% Job Success Score on Upwork ✔ Two successfully completed projects with 5-star client ratings ✔ Ongoing collaboration with a repeat client ✔ 5+ years of Manual and Automation QA experience ✔ Tested 50+ web and mobile applications ✔ Real device testing, not just emulators or simulators ✔ Fast communication across different time zones ✔ Detailed and actionable bug reports with zero ambiguity ✔ Flexible availability, 40+ hours per week Whether you need a one-time QA cycle, Playwright automation, API testing, mobile app testing, or a long-term QA partner, I help your team ship release-ready software with confidence. Core Skills: Manual Testing · Playwright · API Testing · Postman · Mobile App Testing · Web Testing · AI App Testing · BrowserStack · JIRA · Regression Testing · Cross-Browser Testing · Agile Testing · JavaScript