Hire the Best Alpha Testing Professionals

Experienced and self-motivated with 5 years as a web application support and Quality assurance.Offering strong expertise in software testing for Learning Management System and Banking Web and mobile applications

Hi! I'm Md. Najmul Hassain. Digital marketer and app publisher expert. Specialist in 12 Testers Closed Testing. I help businesses run efficient, confidential closed testing with a vetted group of 12 skilled testers. From usability feedback to bug tracking, I provide accurate, structured results to refine your product before launch. Fast turnaround, secure process, and clear reporting guaranteed. Let’s make your release smooth and successful.

Let’s talk and work on your projects together! (I LOVE AND GENUINELY HELP STARTUPS! 📈🚀) Until now, a lot of my clients still have me for work at times they need help. I work with integrity and deliver only with my best leading to having a good relationship with them. What I can do for you: • Software Testing Services (Manual and Automated) • UI Testing (Cross-browser and Cross-device) • API and Performance Testing • AI Prompt Testing • Site Audit (Shopify, WooCommerce and the like) • Technical Documentation and Writing • Editing/Proofreading • Building WordPress Websites • Technical Support / Assistance • Project Management How and where I can be of help: • Analyzing users stories and/use cases/requirements for validity and feasibility • Execute all levels of testing (Exploratory, UI, Regression, Smoke & Sanity, Functional, Usability, Performance, and UAT) • Help AI apps get smarter by testing and providing feedback • Detect and track software defects and inconsistencies, bug reports with annotation • Writing Knowledge Bases and Manuals - Technical Documentation - User Guides • Provide technical support, feedback and recommendations based on best practices What I can offer for the team: • 10+ years of experience as a Software Tester (Web and Mobile) • 2+ years of using AI heavily for product testing • 8+ years doing Technical Documentation w/ close coordination w/ developers on a daily basis • 5+ years of BPO experience as a Technical Support/Helpdesk • Ability to handle multiple tasks simultaneously • Ability to work in a fast-paced environment with minimal supervision • Sense of ownership, critical thinker and problem-solving skills • Excellent interpersonal and communication skills • Team player with Good time-management skills I am very open and flexible on my approach and to discussions to meet each client's needs. Work with integrity. Deliver with quality and excellence. I can only commit to these. Anything you need help with? I will always be glad to be of assistance. Send me a message. 📩

I am a Senior Software QA Engineer with 8+ years of experience in Software Testing, Quality Assurance, Automation Testing, Team Management, and Project Coordination. I have worked with startups, SaaS companies, and enterprise teams to deliver high-quality web, mobile, cloud, and AI-based applications. I specialize in building efficient QA processes, leading testing teams, improving release quality, and ensuring smooth product delivery in Agile environments. My experience includes complete Software Testing Life Cycle (STLC), defect management, test strategy planning, automation support, and client coordination. I also have hands-on experience in AI application testing, including validation of AI-generated responses, prompt testing, workflow testing, data accuracy validation, usability testing, model behavior analysis, and user experience testing for AI-powered applications and chatbots. Core Expertise: • Manual Testing • Automation Testing • Functional Testing • Regression Testing • Smoke & Sanity Testing • Integration & System Testing • API Testing • AI Application Testing • Performance Testing • Cross-browser & Cross-platform Testing • Localization Testing • Mobile Application Testing • User Acceptance Testing (UAT) • Business Workflow Validation • Bug Tracking & Root Cause Analysis • Agile/Scrum QA Methodologies Automation & AI Technologies: • Selenium WebDriver • Cypress • Playwright • Postman API Testing • REST API Testing • JMeter & BlazeMeter • AI Chatbot Testing • Prompt Validation Testing • AI Workflow & Response Validation • Basic CI/CD QA Support • Git/GitHub Management & Collaboration Tools: • Jira • Azure DevOps • ClickUp • Trello • Asana • Redmine Database & Technical Skills: • SQL • Oracle Database • Test Case Documentation • Bug Reporting & Test Planning Why Clients Hire Me: • Strong analytical and problem-solving skills • Clear communication and timely updates • High attention to detail • Ability to manage QA teams and project deadlines • Fast identification of critical issues before production • Focus on delivering stable, scalable, and high-quality applications I am passionate about software quality and continuously learning modern QA and AI technologies to help businesses deliver reliable and user-friendly digital products.

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

Need to know if your platform actually works for real German users, not in a test environment but in the real world? I'm an independent QA specialist based in Germany. Here is what sets me apart: I test with real German bank accounts (Sparkasse, ING, Deutsche Bank, N26), real physical devices (iOS & Android), real money and real KYC, exactly how your actual users experience your platform. No emulators, no test data, no anonymous click-crowd. My work goes far beyond surface-level bug testing. I walk through the entire user journey, from registration and onboarding to payments, checkout, withdrawals and KYC, documenting every friction point, broken flow and localization issue that quietly costs you conversion, trust and retention in the German-speaking market. I work with international companies across SaaS, fintech, e-commerce, iGaming and AI platforms. As a native German speaker, I also catch the linguistic and cultural errors that break trust with German users. Every issue comes documented in a structured, developer-ready report with clear reproduction steps, screenshots and video. WHY CLIENTS WORK WITH ME Real-World Conditions, Not Lab Conditions: I test exactly as real users do, with real accounts, real devices and real payments, catching issues that emulators, test data and automated tools systematically miss. German Market Insight: As a native German speaker, I detect linguistic errors, cultural friction and trust-breaking elements that silently reduce conversion in the DACH market. Developer-Ready QA Reports: You receive structured bug reports with severity ratings, reproduction steps, screenshots and video, so your team can fix issues fast, without back-and-forth. One Specialist, Full Accountability: You work directly with me from start to finish. No rotating freelancers, no callcenter, no dashboard. One point of contact who stands behind every result. AREAS OF EXPERTISE SaaS & Web Application QA: - End-to-end manual testing across all user roles and workflows - Registration, onboarding, subscription and trial flow validation - Role-based access and permission testing - Cross-browser & cross-device testing (Chrome, Safari, Edge, Firefox / Desktop, Tablet, Mobile) - UI/UX review and user drop-off analysis Payment & Fintech Testing: - Real-money deposit, checkout and withdrawal testing - Real German bank accounts and payment methods (SEPA, WERO, PayPal, cards) - KYC and identity verification flow validation - Transaction accuracy and edge-case handling iGaming & Online Casino QA: - First-Time User Experience (FTUE) testing - Registration, KYC and onboarding validation - Deposit and withdrawal testing under real-world conditions - Functional bug detection, UI issues and localization QA AI & Localization QA: - AI output validation and German language accuracy - Evaluating relevance, coherency and factual accuracy of AI-generated content - German localization and translation quality review WHAT YOU WILL RECEIVE - Professional, structured QA reports your developers can act on immediately - A clear launch-blocker list and overall launch-readiness status - UX & conversion improvement insights - Localization QA for the German-speaking market - Video and screenshot documentation of every issue - Reliable re-testing after fixes I combine real user behavior with professional QA analysis to help companies launch stable, trustworthy platforms that work for the real German market. Whether you need a deep pre-launch audit or continuous QA support, feel free to reach out. I'm happy to share a sample report.