Hire the Best Test-Driven Development Specialists in Kolkata, IN

I build practical Agentic AI systems, LLM-powered applications and intelligent automation workflows that can analyse information, make controlled decisions, use tools, interact with APIs and business systems, and return structured, actionable results. My professional background spans 16+ years in software engineering, automation and solution architecture. My career began in quality and automation engineering and gradually evolved into AI application development through advanced AI/ML studies, hands-on Python development, NLP projects, LLM applications and AI-powered software-engineering tools. This combination allows me to build AI agents with a strong focus on reliability, traceability, error handling, human approval and maintainable architecture—not just basic chatbot wrappers. Agentic AI and automation capabilities • Tool-using AI agents and multi-step workflows • LLM-based decision and routing logic • Structured outputs and function/tool calling • Human-in-the-loop approval workflows • API, database and business-system integration • Agent memory, context and workflow state • RAG and knowledge-grounded assistants • Browser and workflow automation using Playwright • Agent evaluation, error handling and observability • Python-based AI services and internal tools Selected AI and agent-oriented work • Designed and prototyped an AI-powered code review agent that analyses source code and produces prioritised recommendations covering bugs, maintainability, security and engineering best practices, while retaining human approval for final changes. • Developed an LLM-powered document intelligence application that processes requirement documents, extracts relevant information and generates configurable structured outputs using Python, Streamlit and OpenAI models. It includes document export, session tracking, structured feedback and model cost/time analysis. • Designed an AI-assisted content intelligence workflow for comparing and validating more than 4,000 source and target web pages using Python, Playwright, crawling, content extraction and structured reporting. • Built a hate-speech and social-bias detection application using PyTorch, BERT and Hugging Face Transformers, with an interactive Streamlit interface. • Implemented transformer-based text-generation workflows using BART, T5 and BERT encoder-decoder models, including data processing and BLEU/ROUGE evaluation. • Developed NLU workflows covering summarisation, classification, sentiment analysis and security-event analysis. Technology Python, OpenAI API, LLMs, Generative AI, Agentic AI, NLP, PyTorch, Hugging Face Transformers, BERT, Streamlit, REST APIs, SQL/SQLite, Docker, Git, Playwright, BeautifulSoup, pandas, NumPy and prompt engineering. I can contribute across the complete AI development lifecycle: requirement clarification, workflow design, implementation, testing, integration, deployment, monitoring, troubleshooting and iterative improvement.

When software ships with bugs or projects drift off track, I'm the person teams call to fix it. With 15+ years in QA and project management — across web, mobile, desktop, e-commerce, fintech, healthcare, and gaming — I bring structure to chaos. I've logged 18,000+ hours on Upwork with a 100% Job Success Score across 60+ contracts, working with startups and established teams alike. What I actually do for clients: Build test plans and execute full QA cycles from planning to sign-off Write airtight test cases, defect reports, and release documentation Run sprints and manage backlogs using Jira, Confluence, ClickUp, and Linear Bridge the gap between developers, clients, and stakeholders — in English and Arabic. I work in Agile/Scrum environments and have tested everything from .NET desktop apps to mobile games to CRM platforms. I don't just find bugs — I help teams build processes so fewer bugs happen in the first place If you need someone reliable, deadline-driven, and fluent in both QA and PM — let's talk.

**QA Engineer | Manual Testing | Web & SaaS QA | Selenium Automation | API Testing** I help businesses **find bugs before their customers do**. I’m a Software QA Engineer with **12+ years of experience** in Manual Testing, Functional Testing, Web Application Testing, UI/UX validation, API Testing, Performance Testing, and Selenium Automation. I have completed QA projects for web applications and SaaS products, with **$20K+ earned and 3,000+ hours on Upwork**. My focus is not simply executing test cases—I look at the application from a **real user's and business owner's perspective** to identify functional issues, usability problems, edge cases, and release risks. ### What I can help you with: ✅ **Manual & Functional Testing** * End-to-end testing of web applications and SaaS platforms * User registration, login, roles & permissions * Forms, workflows, validations and business rules * Regression, smoke, sanity and exploratory testing * UAT and release testing ✅ **UI/UX & Responsive Testing** * UI consistency and usability * Desktop, tablet and mobile responsiveness * Cross-browser testing * Navigation, layouts, forms and user experience issues ✅ **Bug Finding & Documentation** * Clear, reproducible bug reports * Steps to reproduce * Expected vs. actual results * Severity and priority assessment * Screenshots/videos and supporting evidence * Jira/other issue-tracking workflows ✅ **Automation Testing** * Selenium WebDriver with Java * Page Object Model (POM) * JUnit/TestNG * Maven * Reusable automation frameworks * Regression test automation ✅ **API & Performance Testing** * REST API testing with Postman * API validation and negative testing * Basic API automation with Rest Assured * Performance testing with JMeter ### My approach I don't just ask **"Does the feature work?"** I also ask: **"What happens if the user does something unexpected?"** That mindset helps me find edge cases, workflow issues, validation problems, permission defects and usability issues that can easily be missed during basic testing. ### Why clients work with me ⭐ 12+ years of QA experience ⭐ $20K+ earned on Upwork ⭐ 3,000+ Upwork hours ⭐ 5-star feedback across completed QA projects ⭐ Strong manual testing foundation with automation experience ⭐ Clear and detailed bug reporting ⭐ Reliable communication and professional documentation ⭐ Comfortable working independently or as part of a development/QA team If you need a QA professional who can **test your application thoroughly, communicate issues clearly, and help you release with confidence**, I’d be happy to discuss your project.

Full-Stack MERN & Game Developer | AI Integration & QA Specialist | 10+ Years | 80+ Clients | 5M+ Users Are you looking for a reliable partner who can turn your ideas into scalable, high-performance applications and games? That’s exactly what I do... With over a decade of experience, I specialize in MERN stack development, game development, AI-powered solutions, and software testing/QA. I’ve helped 80+ global clients deliver top-notch products and built my own platforms that serve 5M+ active users . Alongside my expertise, I lead a skilled team of developers, testers, support staff, and marketing professionals, which allows me to take on larger projects, ensure faster delivery, and provide end-to-end solutions that cover not just development, but also quality assurance, ongoing support, and product growth strategies. 🔹 What I Can Do for You Build robust MERN applications (MongoDB, Express, React, Node.js) Develop 2D/3D story-driven games (Unity, Phaser, Cocos) Integrate AI agents, automation tools, and chatbots Conduct end-to-end QA & performance testing Provide 24/7 support solutions for ongoing product stability Deliver marketing & growth support to scale your product Manage team-based development, testing, support & promotion for large-scale projects 🔹 Why Clients Hire Me Proven track record of delivering on time & budget Strong focus on clean, maintainable, and scalable code Experience working with startups, enterprises, and personal projects Ability to own projects from concept to deployment & beyond Access to a dedicated team of developers, testers, support & marketing experts Let’s bring your project to life with quality, performance, and creativity at the core. 🚀