Oleksii L.

I help software teams ship reliable, bug-free products - through rock-solid QA strategies, deep test automation, and hands-on leadership across the full quality lifecycle. With 14+ years of experience in QA engineering and team leadership, I've delivered quality across 30+ projects in fintech, sports tech, real estate, game development, and enterprise SaaS. I don't just find bugs - I build the infrastructure that prevents them: end-to-end automation frameworks, CI/CD-integrated pipelines, risk-based test strategies, and QA processes that scale with the team. Whether you need to automate a regression suite from scratch, improve flaky test coverage, validate complex backend logic, or set up a QA process for a fast-moving product team — I can own it end-to-end. What I Do: Test Automation End-to-end automation frameworks using Playwright, Katalon Studio, and Selenium WebDriver Page Object Model (POM) architecture for clean, maintainable test code Achieving up to 90%+ test coverage on UI, API, and data layers Automated regression, smoke, sanity, and integration test suites Manual Testing Exploratory, functional, regression, smoke, and acceptance testing Requirements analysis, test planning, test case design, and defect lifecycle management Risk-based testing prioritization to focus effort where it matters most Cross-browser, cross-device, and cross-platform testing (web and mobile) API and Backend Testing REST and GraphQL API testing with Postman, RestAssured, and custom scripts Backend and data validation using SQL, PostgreSQL, and MySQL Database integrity checks, query validation, and data pipeline testing CI/CD and DevOps Integration Setting up and maintaining QA pipelines in GitHub Actions, GitLab CI, Heroku, and Jenkins Test automation integrated into CI/CD: run-on-commit, scheduled regression, parallel execution Test reporting, logs, and dashboards for engineering and stakeholder visibility Mobile Testing Native and hybrid mobile app testing (iOS and Android) Testing with Swift-based iOS apps, React Native, and cross-platform tools QA Leadership and Process Building QA processes from scratch for startups and scaling teams Leading, mentoring and growing QA engineers Agile and Scrum ceremonies, sprint planning, backlog grooming and delivery coordination Test management in Jira, TestRail, Zephyr and similar tools Industries Fintech and banking: payment flows, compliance logic, financial data accuracy Sports and performance tracking: real-time data, event-driven systems, mobile apps Real estate and property management: web platforms, CRM integrations, geolocation Game development: gameplay mechanics, UI/UX, performance and load testing Stack and Tools Automation: Playwright, Katalon Studio, Selenium WebDriver, Appium, Cypress Languages: Python, JavaScript, Ruby, Swift API Testing: Postman, REST API, GraphQL Databases: SQL, PostgreSQL, MySQL CI/CD: GitHub Actions, GitLab CI, Jenkins, Heroku Test Management: Jira, TestRail, Zephyr, Confluence Methodologies: Agile, Scrum, Kanban, BDD, TDD, Risk-Based TestingReporting: Allure, custom dashboards, GitHub Actions logs Track Record: 14+ years delivering quality across 30+ projects Up to 90% automated test coverage achieved on production systems QA frameworks built from zero for fintech, gaming, real estate and SaaS products Teams of 5+ QA engineers led and mentored Full QA lifecycle ownership: from requirements review to post-release monitoring Key Stats & Achievements 🏆 194+ successful projects completed on Upwork with global clients 💲 $5M+ earned on Upwork through high-impact full-stack and AI solutions ⏱ 55,121+ hours billed, proving long-term client trust and engagement 💼 600+ total projects delivered since 2000 across AI, web, and mobile 📚 100% of developers hold engineering degrees, ensuring expert-level technical depth 👩‍💻 Advanced AI team includes Kaggle competition masters and top ML researchers 📊 91%+ job success rate, reflecting top-tier performance and consistency 🚀 25+ AI-driven apps deployed in FinTech, EdTech, and HealthTech 🧠 30+ machine learning models built and optimized for live environments 🌎 20+ industries served, from startups to Fortune 500 clients 🧱 Founded in 2000, bringing 24+ years of experience in software innovation 🛠 40+ React + Python full-stack solutions developed for scalable applications ⚡ High-load systems deployed to serve thousands of concurrent users 📈 Client ROI increased by up to 70% in AI automation projects 💬 Featured in Forbes, MBN Magazine, and Helsinki Times for client success stories