Hire the Best QA Managers in Zhytomyr, UA

I've been doing QA for over 10 years across all kinds of web projects. SaaS, CRM systems, e-commerce, internal tools, marketplaces, landing pages with complex logic. If it runs in a browser, I know how to break it. I go through the app the way a real user would, but also looking for the edge cases users would never think to try. Billing flows, form validation, role permissions, third-party integrations, API behaviour behind the UI. Lately I've been testing AI-powered products too, chat interfaces, LLM-based features, where the challenge is less about clicks and more about how the system behaves under unexpected input. When the team needs to know how the app holds up under load, I use JMeter. When a project grows to the point where running regression by hand every sprint stops making sense, I can build automation. Playwright or Cypress, TypeScript, wired into CI/CD. On one project, automation brought regression from 3 days down to 2 hours. Bug reports come with exact steps, network traces, and video. Devs don't have to guess what happened, they just fix it. My stack: Postman, Chrome DevTools, Burp Suite, JMeter, SQL, Jira, TestRail, Azure DevOps for manual testing and test management. Playwright, Cypress, TypeScript, JavaScript for automation when the project needs it. Manual, automation, or both. Just message me, and we'll figure it out.

Hello and thank you for visiting my profile! I’m Oleksii - a Senior Full-Stack Engineer with 6+ years of experience building production-ready, scalable web applications end to end using React, Next.js, Node.js, TypeScript, databases, and AI. I help startups and growing companies move from ideas or unstable systems to reliable, high-performance products with clean architecture, real backend logic, and thoughtful UX. What I usually help with • Building and maintaining full-stack applications (frontend, backend, APIs, data) • Designing clean application architecture and reusable components • Developing backend logic, API layers, and integrations • Improving performance and stability across the stack • Running A/B tests and product experiments based on real data • Integrating AI features (chat flows, smart suggestions, automation) • Building design-system-friendly UIs that scale with the product • Setting up CMS-driven content and data models without slowing the team A bit about where I’ve worked • Grammarly - worked on product UI components, performance refactoring, experiments, and CMS migrations in a large-scale production environment • Iceberg io - built AI-powered messaging features with OpenAI, rebuilt the landing experience, and implemented analytics and experimentation • ChainLink Education - developed a full SaaS platform end to end, including frontend, backend logic, data flow, and CMS-driven architecture Industries I’ve Delivered Solutions For: Fintech & Crypto: secure, high-performance full-stack development and database management Health & Wellness: mobile app developer for patient monitoring and wellness platforms Logistics & Supply Chain: automation, workflow, API integrations, real-time dashboard Education & E-Learning: interactive platforms with responsive web design and Nextjs Social Media & Marketing: scalable full stack software developer solutions with React.js front end My Approach to Projects: I focus on understanding business goals first, translating them into robust full stack web developer solutions with React.js, Node.js, and PostgreSQL / MongoDB databases. Every project is structured for performance, maintainability, and future scalability. I prioritize automation, clean code, and efficient workflow to save time and reduce risk for clients. Long-Term & Scalable Solutions: Many clients hire me as a full stack software engineer or software project manager for long-term collaboration. I provide guidance on architecture, Next.js frontends, React Node integrations, and mobile app development strategy. I also implement AI agents or OpenAI solutions when needed to enhance platform capabilities. Hands-On Technical Leadership: As a senior full stack developer react node and React full stack developer, I lead teams, review code, and ensure full stack development projects meet the highest standards. I integrate API, manage database structures, and maintain GitHub repositories for seamless collaboration. Why clients choose me: I combine React developer skills, Node.js backend expertise, and full full stack development knowledge to deliver results aligned with timelines and budgets. I provide long-term experience, from project planning to deployment, ensuring every workflow, database, and dashboard is optimized for performance. I’m comfortable owning features from idea to production, working closely with product, design, and backend teams, and making pragmatic technical decisions that move the product forward. Feel free to share the details of your project - I’ll review them and suggest the best way to achieve your goals efficiently.

Experienced QA Automation Engineer with 8+ years of experience in software testing, automation, and quality assurance. Strong background in test development, execution, and maintenance for web applications and backend systems. Proven track record of implementing effective test strategies, identifying critical issues early, and driving products to stable production releases. Highly detail-oriented, reliable, and comfortable working in Agile environments. Core Competencies - Full-cycle testing experience across SDLC and STLC - Agile / Scrum development process - Manual and Automated Testing - Test Case, Test Plan, and Test Scenario design based on business, technical, and functional requirements - UI Automation Testing (Selenium WebDriver) - API Testing (REST, GraphQL) - Functional, Integration, Regression, Smoke, UAT, and Production Testing - Bug reporting, tracking, and verification (Jira) - CI/CD pipeline support (Jenkins) - Log analysis and monitoring (Kibana) - Strong teamwork

I am a Software QA Tester with 10 years of hands-on experience performing different types of testing not limited to functional/non-functional, GUI/UI, API, installation, usability and regression testing for both web and mobile applications. I have been working at the Upwork company for many years as QA Tester/Manual Tester. My achievements include successful completion of many tasks on up-work, participation in enterprise projects in different teams and solid feedback on my completed tasks. My qualifications include: - Web and Mobile testing, inc. exploratory, functional, and usability testing - Cross-platform testing - Software quality assurance - Test Scenarios Creation - Test Execution and Bug Reporting & Verification - Agile & Scrum methodologies. I’ve increased company income by finding important bugs on production and monitoring defect statuses. I’m a quick learner and familiar with tools such as: - 10 years of experience in manual testing of applications based on iOS and Android APP and mobile browsers, desktop applications. - Full-Time QA Engineer (Manual Tester freelancer) on Upwork company with expertise in Mobile application and Web Testing, Hybrid Application Testing, Cross Platform Mobile app and Website Testing. - Familiar with Project Management and Bug Tracking Tools — JIRA, Jenkins, Slack - Experienced in preparing documentation: Test Requirement / Test Plan / Test Strategy / Test Case / Test Scenarios / User Flow / Bug Report / Test Summary Report / Manual Testing Execution of QA with different Testing Types: - Strong expertise on Functional and Non-functional testing - Acceptance Testing, Sanity Testing, Integration Testing, Regression Testing, Manual Testing - Flow verification, Interface Testing - Usability testing, Cross-browser testing, Localization testing , Manual Tester - UI/UX Testing, Mobile Application Testing (Native) - iOS, Android - User Acceptance Testing, Reliability Testing, User Interface Testing, Re-testing/Confirmation Testing - Can perform tests in different timezones. Availability of devices: Operating Systems MacOS / Win 10 / Win 11 / Linux, Ubuntu Mobile Operating System Phone 10 - 16 iPhone / iPad / Samsung / Redmi / MI I am driven by quality, details, user experience, and satisfying the customer. I'm a hardworking individual who is a team player and learns fast and can learn multiple skills.