Vitalii B.

Senior QA Engineer with 5 years of experience helping product teams release stable, user-friendly software. I find the bugs that are easy to miss, build automation frameworks that hold up over time, and test AI-powered products, from chatbots to LLM-based features. 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬: Finance • Healthcare • E-commerce • SaaS • Telecom • Education • Travel & Logistics • iGaming • Mobile apps • AI-powered tools 𝐖𝐇𝐄𝐑𝐄 𝐈 𝐀𝐃𝐃 𝐓𝐇𝐄 𝐌𝐎𝐒𝐓 𝐕𝐀𝐋𝐔𝐄 • User-focused testing: I look at the product the way a real user does and catch issues that scripted checks miss. • Reliable automation: Cypress, Playwright and Selenium frameworks that shorten regression cycles and are easy for the team to maintain. • Performance confidence: load and stress tests that show how your app behaves under real traffic. • AI & LLM quality: testing AI chatbots, LLM-based features and AI assistants, where the same input can produce different outputs and "expected result" needs a different approach. • Clear communication: bug reports with steps, context, screenshots and logs, so developers can reproduce and fix issues quickly. 𝐀𝐈 𝐂𝐇𝐀𝐓𝐁𝐎𝐓, 𝐋𝐋𝐌 & 𝐀𝐈 𝐀𝐒𝐒𝐈𝐒𝐓𝐀𝐍𝐓 𝐓𝐄𝐒𝐓𝐈𝐍𝐆 • Response quality: accuracy, relevance, tone, completeness and consistency across repeated and rephrased prompts • Hallucinations: checking answers against source data and flagging made-up facts, links and citations • Safety and guardrails: prompt injection, jailbreak attempts, harmful or off-topic outputs, leakage of sensitive data • Conversation flows: multi-turn context, memory, fallback and error handling, handoff to a human agent • Integrations: API and tool/function calls, RAG pipelines, response time, timeouts and failures under load • Regression for AI: prompt and model-version comparisons, curated test datasets and evaluation checklists • AI in my own workflow: Claude and GitHub Copilot help me design test cases and speed up automation, and I verify every result manually 𝐓𝐄𝐂𝐇 𝐄𝐗𝐏𝐄𝐑𝐓𝐈𝐒𝐄 ➔ Manual Testing: Functional, Regression, Exploratory, UI/UX, Security, Penetration, Black/White Box ➔ Automation: Playwright, TypeScript, Cypress, Selenium, Appium, BDD/TDD (SpecFlow, Cucumber, JBehave) ➔ API Testing: Postman, SoapUI, Charles Proxy, SQL ➔ Performance Testing: JMeter, LoadRunner ➔ Cross-Browser & Devices: BrowserStack, Sauce Labs, AWS Device Farm, real iOS/Android devices, macOS, Windows ➔ AI & LLM Testing: chatbot and AI assistant testing, prompt testing, hallucination and consistency checks, prompt injection and guardrail testing, multi-turn conversation flows, LLM API testing (Postman), model and prompt version regression, test datasets and evaluation checklists ➔ AI-Assisted QA: Claude, GitHub Copilot for test case design, test data generation, automation scripts and bug report drafts (all output reviewed manually) ➔ Version Control: GitHub, GitLab, Bitbucket ➔ CI/CD: GitHub Actions, Jenkins, Bamboo, Maven, Docker, Heroku ➔ Project Management: Jira, Linear, Asana, Trello, Redmine ➔ Test Management: TestRail, Zephyr, Xray, qTest, PractiTest 𝐇𝐎𝐖 𝐖𝐄 𝐂𝐀𝐍 𝐖𝐎𝐑𝐊 𝐓𝐎𝐆𝐄𝐓𝐇𝐄𝐑 • Free initial consultation to align on goals and scope • Trial week to show my testing approach in practice • QA built around your real users, with regular updates along the way 🔥 Every strong release starts with the right testing. 𝐒𝐄𝐍𝐃 𝐌𝐄 𝐀 𝐌𝐄𝐒𝐒𝐀𝐆𝐄 and let's make your product something your users can rely on. Use these key words to find me: Manual Testing, Automated Testing, Automation Test, Test Automation Framework, Test Case Design, Test Execution, Functional Testing, Unit Testing, End-to-End Testing, Exploratory Testing, Usability Testing, Compatibility Testing, Performance Testing, Load Testing, Security Testing, Smoke Testing, Sanity Testing, Regression Testing, Product Stability, Software QA, AI Testing, AI QA Engineer, AI Quality Assurance, AI-Assisted Testing, AI-Powered Testing, AI-Drive Software Testing, QA Engineering, .NET Stack, JavaScript, TypeScript, Next.js, React, Node.js, Selenium, Selenium WebDriver, Playwright, Cypress, Appium, Robot Framework, Page Object Model, POM, BDD, Cucumber, Gherkin, Mocha, Chai, Jest, TestNG, JUnit, API Testing, RESTful API, SOAP API, GraphQL, Swagger, Postman, JSON, YAML, Node.js Backend Testing, Database Testing, Desktop Application Testing, Mobile App Testing, Web Testing, Cross-Browser Testing, BrowserStack, ServiceNow, Atlassian Confluence, Jira, Trello, Asana, Git, GitHub, GitLab, Bitbucket, CI/CD Pipelines, Jenkins, Docker, Azure DevOps, Xcode, Android Studio, Visual Studio Code, Test Coverage, Test Strategy, Defect Lifecycle, Bug Tracking & Reports, Bug Reports, Annotated Screenshot, Screen Recording, Release Notes, Documentation Review, Continuous Testing, Shift-Left Testing, Risk-Based Testing, Quality Control, Requirements Analysis, Collaboration with Developers, Communication Skills, Email Communication, Time Management, Agile, Scrum, User Stories.