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Full-stack engineer ( 28+ years ) turned technology executive, hands-on across cloud-native microservices, AI/ML pipelines, FinTech integrations, eCommerce platforms, and CRM ecosystems. From writing code to architecting the systems that process $22B in annual transactions, the technical depth has never left the room. Comfortable at every layer of the stack from debugging SAP S/4HANA and shipping hackathon features in 4 days, to designing multi-cloud architectures and deploying AI agents into production. The title changes; the instinct to build doesn't.

✔ 𝗜 𝗵𝗲𝗹𝗽 𝘀𝗺𝗮𝗹𝗹 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀𝗲𝘀 𝗽𝗿𝗲𝘃𝗲𝗻𝘁 𝗰𝗼𝘀𝘁𝗹𝘆 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗶𝘀𝘀𝘂𝗲𝘀 𝗮𝗻𝗱 𝗶𝗻𝗰𝗿𝗲𝗮𝘀𝗲 𝗿𝗲𝘃𝗲𝗻𝘂𝗲 𝘁𝗵𝗿𝗼𝘂𝗴𝗵 𝘀𝘁𝗿𝗮𝘁𝗲𝗴𝗶𝗰 𝗤𝗔 𝗮𝗻𝗱 𝘂𝘀𝗲𝗿-𝗳𝗼𝗰𝘂𝘀𝗲𝗱 𝘁𝗲𝘀𝘁𝗶𝗻𝗴. 🏆 𝟐𝟎𝟎 + web sites and 📱 𝟔𝟎+ mobile apps were tested, improved and debugged, ensuring the best quality, usability and conversion. 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞, 𝟔𝟖𝟎𝟎 hours worked at Upwork. Experience in testing AI-driven apps. ▶ Senior Software Tester / QA Expert / Web & Mobile app testing / QA Analyst / WordPress pro / Project Manager. I work with small business: WordPress, WooCommerce, Shopify web development companies, early-stage SaaS startups, product owners and indie software developers. Your digital business's success is based on the quality of your software! My top priority is identifying issues before they reach your users. My specializations: • AI - Extended Manual QA: Mobile App Testing - iOS / Android, Web testing • Technical Project Management 𝐖𝐡𝐲 𝐝𝐨 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐜𝐡𝐨𝐨𝐬𝐞 𝐭𝐨 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡 𝐦𝐞? 👇 ✔"Vitaly is an amazing tester and gives such much attention to detail. He has given me new tools to use in my own business and has streamlined a lot of things for me. Could not recommend him more." As a results-driven QA Engineer, I deliver high-quality, reliable, and user-friendly products that exceed expectations. By leveraging a wide range of QA tools, devices, and testing methodologies, I ensure top-notch results that drive customer satisfaction. 🔍 𝑪𝒐𝒓𝒆 𝑴𝒂𝒏𝒖𝒂𝒍 𝑸𝑨 𝑻𝒆𝒔𝒕𝒊𝒏𝒈 𝑺𝒆𝒓𝒗𝒊𝒄𝒆𝒔: ✅ Risk-Based Testing ✅ AI-assisted QA ✅ Conversion focused e-Commerce QA ✅ Websites, Mobile App, Flutter, Game Testing ✅ Functional Testing ✅ Cross Browser / Cross Device Testing ✅ End-to-End Testing ✅ Compatibility Testing, Responsive Design Testing ✅ UI/UX Testing and Review ✅ Exploratory Testing, Black Box Testing ✅ Usability Testing, User Acceptance Testing (UAT) ✅ Smoke, Sanity, Regression Testing ✅ Beta Testing, Pre-Launch, Post-Release QA ✅ Test Case Design & Execution ✅ Agile Scrum ✅ QA Management ◉ Domains tested: AI - powered apps, Healthcare (4 years experience - QA Lead), WordPress, WooCommerce, E-commerce, Shopify, Laravel, OpenCart, Magento, Real Estate, Wellness solutions, Kids and EdTech applications, CRMs, dating apps, Bubble io (no-code apps), custom websites, iGaming / betting, Online casinos and games. 🧪 𝑻𝒐𝒐𝒍𝒔, 𝑬𝒏𝒗𝒊𝒓𝒐𝒏𝒎𝒆𝒏𝒕𝒔 & 𝑫𝒆𝒍𝒊𝒗𝒆𝒓𝒂𝒃𝒍𝒆𝒔: • I combine the best QA techniques & AI to increase testing efficiency and covering • Mobile App Testing: Android Studio, TestFlight, Diawi, iMazing & Emulators, Postman • Bug Tracking & PM tools Jira, Trello, Asana, Monday com, Notion, GitHub I supply Detailed Bug Reports with Annotated Screenshots, Videos • Cross-device Testing: Browser Stack, Blisk, DevTools / Сonsole • Understanding frontend - HTML, CSS, JS • Familiar with on-page SEO Experience in QA Documentation - Design and UI testing: Photoshop, Figma, Adobe XD, PerfectPixel • Conversion: Hotjar - Project Management Support 🤝 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? As a Expert Software QA and Project Manager, I bring a unique blend of technical expertise and business awareness to every project. With a proven track record in WordPress web development and QA, I deliver high-impact solutions that drive results. By combining technical expertise with collaborative approach, I help my clients to launch reliable, user-friendly products that are over the top. My experience in the IT field is also underscored by the fact that I run my own WordPress / WooCommerce dev and QA company. Soft skills: ◉ Adaptable & Results-Oriented: I'm a quick learner who delivers results-driven solutions. I prioritize quality over everything else. ◉ Industry Expertise: I stay current with the latest industry trends, test design methodologies, and best practices in QA software testing. ◉ Dedicated Client Support: I'm always available for open communication, ensuring your needs are met and concerns are addressed. ✅ I can successfully meet deadlines. I'm available for both short-term QA tasks and long-term collaboration. 💬 There are few verified reviews from my happy Customers: ✔I can recommend Vitaly's website QA testing services enough. Their professionalism, speed, and meticulous attention to detail are second to none. If you are seeking top-notch QA services, Vitaly is the team to trust. I am truly grateful for their exceptional work and will undoubtedly engage their services for any future QA needs. ✔Vitaly paid great attention to details. I would recommend him on QA tester /Senior QA role. Well done!; ✔Excellent knowledge and experience about testing 📩 Let’s work together to ensure your product is fully tested and ready for success. Feel free to drop me a message on Upwork - just click the button in the top-right corner. 𝑩𝒆𝒔𝒕 𝑹𝒆𝒈𝒂𝒓𝒅𝒔, 𝑽𝒊𝒕𝒂𝒍𝒚 𝑩𝒊𝒆𝒍𝒊𝒂𝒌𝒐𝒗

California-based programmer with an extensive background in a variety of technologies, including desktop, mobile, and web platforms. I deliver high quality software by communicating with my clients effectively and working tirelessly to understand their exact needs for a project. With a thorough analysis of the problem and an effectively designed solution, I'm able to leverage years of independent software experience to implement and deliver your product quickly and effectively. I graduated from Santa Clara University with a Master's degree in Software Engineering in 2012, and have spent the last decade working with clients all over the Silicon Valley area. Here on Upwork, I've achieved and currently hold the Top Rated, Top Rated Plus, and Expert-Vetted talent badges - which are the highest the platform offers. I've also acquired AWS certifications in a variety of disciplines, all of which contribute to my broad understanding of technical domains and enhance my ability to design and implement effective solutions tailored to your project's needs. I strive to delight my clients with every project I undertake, and I would love to do the same for you. Please reach out if you have any questions!

Are you looking to build a high-performance SaaS platform, automate a complex supply chain, or integrate secure, production-ready AI into your business workflow? Many developers can write code, but very few understand how to seamlessly blend cutting-edge AI/ML systems with scalable, enterprise-grade architecture while ensuring strict data security (HIPAA, PCI-DSS). I am a Full-Stack Developer and AI/ML Engineer with extensive experience architecting end-to-end solutions for SaaS, Supply Chain, Healthcare (HIS/HMS), and custom ERP systems. Whether you need to build an MVP from scratch or scale an existing enterprise platform, I deliver clean, maintainable code and robust infrastructure. 🚀 Core Expertise & How I Can Help You: AI/ML & GenAI Integration: Building intelligent RAG systems, custom chatbots, and LLM-powered workflows using OpenAI, Anthropic, LangChain, and Vector Databases (Pinecone, Qdrant). Robust Backend & Architecture: Designing secure, high-throughput microservices and APIs using Node.js (NestJS), Python (FastAPI/Django), and PHP, backed by PostgreSQL, MongoDB, or Redis. Modern, Responsive Frontends: Crafting seamless web and mobile interfaces using React, Next.js, Angular, Vue.js, and React Native. Cloud, DevOps & Compliance: Deploying production-ready applications on AWS/GCP/Docker with CI/CD pipelines, keeping security and regulatory standards (HIPAA, GDPR) at the forefront. 🛠️ Technical Snapshot: Frontend: React, Next.js, Angular, Vue.js, React Native, Tailwind CSS Backend: Node.js (NestJS/Express), Python (FastAPI/Django), PHP, Java AI/ML: LLMs, LangChain, Vector DBs, Prompt Engineering, RAG Systems Cloud & Databases: AWS, GCP, Docker, Kubernetes, PostgreSQL, MySQL, MongoDB, Redis Let’s build something scalable. Click the "Invite to Job" or "Hire" button on the top right, and let’s discuss how we can bring your project to life.

📝 Overview: 🧪 Passionate and detail-oriented QA Tester with hands-on experience in manual and automated testing of web and mobile applications. I specialize in identifying bugs, improving user experience, and ensuring that your application works flawlessly across all platforms and use cases. With a strong foundation in test planning, test case creation, and defect tracking, I work closely with developers and stakeholders to ship bug-free, user-friendly software that meets business goals. 🔍 Core Competencies: ✅ Manual Testing: ⚡Functional, Regression, Smoke, Sanity, UI/UX, and Cross-browser testing ⚡Writing clear and comprehensive test cases ⚡Bug reporting using Jira, Trello, or ClickUp ✅ Automation Testing: ⚡Selenium WebDriver for web testing ⚡Basic scripting with Java/Python ⚡TestNG, Maven, JUnit for automation frameworks ✅ Mobile App Testing: ⭐Testing Android and iOS apps on real devices and emulators ⭐Compatibility, UI, and performance testing ✅ API Testing: ⚡Testing REST APIs using Postman ⚡Validating request/response, status codes, and edge cases ✅ Tools & Platforms: ⭐Jira, Bugzilla, TestRail, Postman ⭐Selenium, JUnit, TestNG (basic level) ⭐BrowserStack, Android Studio, Xcode ⭐Git/GitHub for version control 🎯 Why Choose Me? ✔️ Detail-oriented and committed to delivering high-quality, reliable test coverage ✔️ Excellent communication and reporting skills ✔️ Collaborative mindset—comfortable working in Agile teams ✔️ Strong documentation and bug tracking ✔️ Quick learner, always up-to-date with new tools and QA trends 🧰 Tech Stack Summary: 🚀 Testing Types: Functional, Regression, Smoke, Sanity, UI, API 🚀 Tools: Selenium, Postman, Jira, Trello, TestRail 🚀 Languages: Java (basic), Python (basic), SQL (queries for DB validation) 🚀 Platforms: Web, Android, iOS 🚀 Automation (basic): Selenium WebDriver, TestNG, Maven Let’s work together to improve your software quality, reduce production bugs, and deliver a better user experience. 🛠️ 📩 Message me today to discuss your QA needs.

I have over 6 years of experience as a Manual QA Tester, working on web and mobile applications for an international client in Germany. My daily work includes functional, regression, exploratory, and usability testing, creating detailed bug reports in Azure DevOps, and collaborating closely with developers to ensure high-quality releases. Beyond finding bugs, I always evaluate whether a feature makes sense from the user's perspective. I enjoy identifying confusing workflows, UX inconsistencies, and opportunities to improve the overall user experience.