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Hello! 🖐I'm QA Tester with wide experience in API, web and mobile automated testing. I'm an expert in QA automation, performance testing, manual testing and testing processes. Although as meticulous QA Tester I'm happy to jump on any challenge and technologies / industries, generally I'm focused on providing reliable cost-effective testing solutions for long-term enterprise projects. I can compete a full stack developer in the skills and knowledge of how the modern software is built. And I surely use that knowledge to create bug-catching test cases and validate every dark corner of the product!💪🏻 ✅ 11+ years in QA Engineering ✅ 30+ successfully validated releases ✅ 5000+ automated test cases developed using QA Playwright, Cypress, Selenium ✅ 95% pass rate in UI framework with almost 2000 tests ✅ 5+ mobile applications automated as Mobile Automation Engineer (Android / iOS) ✅ 5+ performance testing projects completed using Gatling, JMeter, Locust and k6 ✅ 90% automated tests coverage achieved across critical business applications ✅ 80% reduction in production bugs through comprehensive QA automation strategies Programming languages: 🔶 Python 🔶 Java 🔶 JavaScript 🔶 TypeScript Frameworks and test runners: 🔶 Playwright 🔶 Cypress 🔶 Selenium WebDriver 🔶 Appium 🔶 Pytest 🔶 TestNG Performance testing 📊: Gatling, k6, JMeter, Locust, website performance. Other experience: 🔹Automation Testing Engineer with expertise in API testing, backend integration testing. 🔹QA Automation proficient in test framework design and maintenance. 🔹QA Tester implementing UX testing to ensure optimal user experience across all platforms (UX QA). 🔹SDET with strong technical background in open-source project, working with huge international team. 🔹Mobile Automation Engineer for iOS/Android applications. 🔹QA Lead experience managing teams of 15+ QA testers and automation engineers. 🔹As QA Engineer received ISTQB certification Industries: ✔️ Healthcare Technology: Automation tester for QA nurse scheduling and patient management systems ✔️ Salesforce QA: Comprehensive testing for 25+ Salesforce orgs and custom applications ✔️ E-commerce & Performance Marketing: as main QA Tetser I optimized testing strategies for high-traffic platforms ✔️ AdTech: Implemented robust QA automation for advertising manager and provider ✔️ Restaurants: lead QA team on quick-service restaurants (QSR) and table-service restaurants (TSR) multiplatform mobile application Why me?🤝🏻 As an experienced Automation Engineer and QA Tester specialist, I bring a unique combination of technical expertise and business acumen. My role as QA tester evolved into Automation Tester and eventually QA Lead, giving me comprehensive understanding of the entire testing lifecycle. Whether you need a Performance Testing expert, SDET for complex integrations, or Automation QA Engineer for your next project, I deliver measurable results that drive business success.

Still searching for an experienced QA tester / QA engineer? Let's save your time and talk 😉 I’m a QA tester with 10+ years of experience in manual testing, QA automation, and overall product quality assurance across web, mobile, and SaaS platforms. I help teams test faster, release with confidence, and catch issues before users ever see them. I also collaborate closely with developers and product teams, so I understand how quality fits into the full delivery cycle, not just testing in isolation. With a background that overlaps with a full stack developer mindset, I know how modern products are built and where bugs usually love to hide. ✅ Services I offer as a QA Tester / QA Engineer 🔹 Manual QA testing Smoke, sanity, exploratory, and regression test coverage to uncover functional, UI, and usability issues. 🔹 QA automation As an automation tester, I build stable, reusable, and scalable automated test suites using Playwright, Cypress, Selenium, and Appium. 🔹 API QA testing End-to-end API test coverage using Postman, REST Assured, and Supertest to validate logic, integrations, and data flow. 🔹 Regression QA testing Careful regression test cycles for new features and legacy systems, helping prevent hidden bugs from slipping into production. 🔹 Performance QA testing Load and stress test execution with JMeter and LoadRunner to make sure your application performs well under pressure. 🔹 Security QA testing Testing for common vulnerabilities using OWASP ZAP, Burp Suite, and custom scripts to protect critical systems and user data. 🔹 Cross-browser QA testing Reliable test coverage across major browsers, screen sizes, and devices for a consistent user experience. 🔹 Accessibility QA testing Accessibility-focused test processes to support WCAG compliance and inclusive product design. ✅ Tools and Libraries ✔ QA Automation: Playwright, Cypress, Selenium, Appium ✔ API Testing: Postman, REST Assured, Supertest ✔ CI/CD Integration: GitHub Actions, GitLab CI/CD, Jenkins ✔ Bug Tracking & Test Management: TestRail, Zephyr, Jira, Trello, TestomatIO ✔ Reporting: Allure, Mochawesome ✅ Certifications and Experience 📌 ISTQB Certified QA Tester — strong foundation in QA methodologies, structured test design, and quality processes. 📌 Domain Experience: Fintech, Cybersecurity, Healthcare, Marketing, Construction, Telecommunications, Real Estate, AI/ML, Logistics, and 20+ other industries. 📌 QA Leadership: Mentoring junior testers, setting up scalable QA automation workflows, improving test strategy, and defining detailed test plans for complex products. What I’ve Been Responsible For as a QA tester • API QA tester: validating endpoints, integrations, and secure data flow • Cross-browser QA tester: ensuring smooth behavior across browsers and devices • Accessibility QA tester: using tools like axe-core to support compliance • Security QA tester: identifying risks and supporting safer releases • Mobile QA tester: full-cycle mobile app test coverage with Playwright and Appium • Automation tester: building maintainable QA automation frameworks for long-term product stability Let’s connect!

🙈“Can we just quickly fix this?”(с) - famous last words of many startups. 🙊“It’s probably just a small change.”(с) 🙉“Let’s ship first and think later.”(с)…. I am a CEO and Business Manager at Peppernode - and I help create systems where architecture matters, decisions matter, and the cost of mistakes is higher than the cost of doing it right. I am your right person. Call me Illia. 🥇EXPERT-VETTED - Only 1% of talents get this badge 💯100% JOB SUCCESS 🏆 TOP RATED PLUS - Top 3% of companies ✅ Full Stack Developer React ✅ Python developer ✅ React Native Developer ✅ Front end Developer ✅ React Developer ✅ React Native Mobile ✅ Saas Developer With 12+ years of experience, I specialize in building scalable and reliable web and mobile applications. I work as a Full Stack Developer React focused on SaaS products, modern architecture, and long-term scalability. I have strong experience working as a Python Full Stack Developer Flask specialist and Front end Developer on complex systems that require clean structure and stable performance. I build modern SaaS platforms and complete products from idea to deployment. I work as a Full Stack Developer and Front end Developer react together with backend systems to deliver complete solutions. My experience includes video streaming platforms with auto-scaling infrastructure and restaurant ordering systems serving thousands of daily users. My expertise includes web development, mobile app development react native full stack, node js react native mobile developer, PWA applications, SaaS development, mobile solutions as a Front end Developer react, and experience as a WordPress Developer delivering business websites and custom web solutions. I also work as a React Developer firebase creating scalable frontend systems and modern interfaces. My experience as a React Native Mobile engineer allows me to deliver smooth experiences across platforms. 💡Here’s how I can help you succeed: I’m a Full Stack Developer, senior full stack web developer, Front end Developer, and Mobile App Developer with strong experience as a React Native Developer expo, React Developer, and React Native Mobile specialist. My focus is building scalable, innovative, and user-centered products that help businesses grow. As a React Full Stack Developer and React Native Developer, I build high-performance SaaS products with scalable frontend and backend architecture. I also work as a full stack developer react native delivering modern React ecosystems and React Native app developer solutions for startups and enterprise platforms. I also work as a Full Stack Developer React firebase and React Developer building high-performance systems, scalable user experiences, and mobile applications powered by React Native. From idea validation to deployment, I guide projects through the entire lifecycle while making sure every application is optimized for functionality, and maintainability. I work with OpenAI API, Copilot, React Native, Gemini, Perplexity, and LangChain to create AI-powered systems, chatbots, and workflow automation solutions. I help migrate Laravel projects into Python Django or FastAPI ecosystems. Backend Development: I work with Python, Node.js, APIs,API Integration and scalable backend systems. I have experience as a Full Stack Developer React Node specialist building SaaS architecture and integrations. I work as a Full Stack Developer React engineer supporting React Developer workflows and React Native Mobile applications. Frontend Development: I work as a Full Stack Developer supabase react and Front end Developer. I work as a React Native Developer, React Developer, and React Native Mobile specialist using Angular, React, React Native, JavaScript, HTML5, and CSS. I build modern interfaces with scalable frontend architecture using React Native for high-performance and cross-platform mobile applications. As a WordPress Developer I also create custom business websites, landing pages, and content-driven platforms. Mobile Development: I build cross-platform applications as a Full Stack Developer shopify, React Native Developer, Flutter Developer, React Native Mobile engineer, Mobile App Developer, and Front end Developer using React Native, Expo, Firebase, TypeScript, Vue.js, jQuery, Bootstrap, Tailwind, JavaScript. I work as a React Developer focused on scalable React Native Mobile solutions Database Management: I work with CSS 3, PostgreSQL, MySQL, SQL optimization, and high-performance database systems for SaaS platforms, stripe and enterprise applications Cloud & DevOps: I work with AWS, Docker, and cloud infrastructure. My expertise as a Full Stack Developer ai, React Native Developer allows me to build reliable production-ready systems. I work as a React Developer, React Native Developer, Full Stack Developer React engineer, business analyst build React Native Mobile ecosystems, SaaS platforms and modern application using React Native to deliver high-performance cross-platform experiences.

⚡ In one month, was reduced the number of bugs by 63% by using implementation metrics and changing the SDLC at Preply. Through QA Engineer, QA Tester, and QA automation services, regression time was reduced by 70%, saving 80+ QA hours per month and $5K+ in manual QA costs. The delivered software testing approach covers web, mobile, and APIs, improving overall test coverage, reliability, and release confidence. 🔍 Manual testing services were delivered from both a QA Tester and QA Engineer perspective across web, mobile, and API layers to validate functionality, regression, and edge cases through structured software testing practices and well-designed test scenarios. 🤖 QA automation solutions were implemented and maintained using Cypress, Selenium, Playwright, Appium, and WebdriverIO by applying QA Engineer and automation engineer practices to build scalable QA automation frameworks. This delivery reduced hot fixes by 50% and production bugs by 64%, while 1000+ APIs were validated through CI pipelines as part of automation-driven software testing. These QA Engineer, QA Tester, and QA automation services help startups and product teams release faster by combining QA tester-level validation, QA engineer-level quality architecture, and scalable QA automation delivery. The focus is on engineering quality into the product ecosystem, not just executing tests, while collaborating with developers, project manager, and full stack developer teams. 📈 Impact Highlights | QA Engineer • QA Tester • QA Automation ✅ Regression time reduced by 70% through delivered QA automation designed with QA Engineer practices ✅ $5K+ saved on manual QA through automation-driven software testing ✅ Production bugs reduced by 64% through structured QA Engineer-led QA processes 🔍 Delivered QA Engineer & QA Tester Capabilities Mobile App Testing (Manual) Mobile software testing services validate Android and iOS applications across real devices and emulators. A QA Tester and QA Engineer approach ensures coverage of business logic, UX, and stability through structured test execution. Web Testing (Manual) Functional, regression, cross-browser, and responsive software testing delivered by QA Tester and QA Engineer processes ensures consistent behavior across browsers and devices. API Testing REST and GraphQL APIs are validated by QA Engineer-driven software testing for correctness, authorization, error handling, and business logic to strengthen backend reliability used Postman and QA Automation 🤖 QA Automation Solutions | QA Engineer Mobile QA Automation Scalable QA automation frameworks designed and delivered using QA Engineer practices. 🤖 Regression reduced by 70% through mobile QA automation 🧰 Hybrid QA automation frameworks built with WebdriverIO + Appium by QA Engineer 🔄 QA automation integrated into CI/CD pipelines Web QA Automation Scalable web QA automation delivered by automation engineer and QA Engineer processes using Playwright and Cypress. ⚡ 80+ QA hours/month saved through automated regression 🔄 90%+ of core user flows automated 💥 50% reduction in hotfixes through continuous QA automation runs API QA Automation Automation coverage delivered using QA Engineer-driven automation strategies. 🚀 1000+ endpoints validated through QA automation 📊 Backend QA time reduced by 60% through automation 💼 Delivered QA Infrastructure & QA Engineer Processes - Full QA processes designed and delivered using QA Engineer practices, combining manual software testing and QA automation - CI/CD pipelines designed with integrated QA automation - QA documentation delivered (test plans, test cases, checklists) - QA metrics defined for coverage, defects, and release quality - QA Engineer collaboration alongside developers, project manager, and full stack developer teams to enable shift-left testing If your product needs QA Engineer expertise, QA Tester services, or scalable QA automation and software testing infrastructure to support fast and reliable releases — let’s connect. 🚀 Quality engineered. Releases faster. 🚀

Senior Mobile Lead Engineer | 10 years of experience | High-quality Mobile and Web Apps | Claude Code Premium Apps for startups and established companies worldwide. 📊 My Core expertise is the Apple ecosystem, delivering robust solutions across iOS (Swift, SwiftUI), iPadOS, watchOS, and macOS. I work extensively with Swift, SwiftUI, UIKit, Combine, Objective-C, and advanced Apple frameworks such as HealthKit, MapKit, and complex third-party integrations. Beyond development, I provide end-to-end product delivery — from idea validation to App Store release. By combining Business Analysis, UI/UX Design, Agile Development, and Quality Assurance, we build future-proof applications that minimize technical debt and reduce long-term maintenance costs. ⸻ Services I can provide: 📱 Native Mobile Development (iOS & Android) • iOS Development: Swift, SwiftUI, UIKit, Combine, Objective-C • Android Development: Kotlin, Java • Cross-platform: React Native, Flutter • Apple Watch apps, smartwatch apps • Health & fitness apps, Apple Health, HealthKit • Maps & navigation (MapKit, Google Maps, Mapbox) • Real-time features, sockets, charts & analytics 🌐 Web Development • React, Angular, Next.js • TypeScript, JavaScript • High-performance front-end and responsive UI development 🛠 Backend & DevOps • Node.js, Python, Go, PHP • API development & third-party integrations • Cloud deployment: AWS, Docker, VPS 🎨 UI/UX Design & Product Thinking • Figma, wireframes, prototypes, user flows • Product discovery and idea validation before development 📊 Management & QA • Agile project management • Manual & automated testing • Business analysis & product ownership support ⸻ Fintech Expertise • Crypto applications (BTC, ETH, USDT, TRC20) • Real-time exchange data & socket connections • Charts, analytics, and on-chain operations • Secure authentication & sensitive data handling ⸻ Why Clients Choose Us ✔️ iOS-first team with deep expertise as Swift Mobile Developers ✔️ Reliable long-term partner for scalable product development ✔️ Strong focus on performance, usability, and clean architecture ✔️ Transparent communication and Agile processes ✔️ Full-cycle delivery: design → development → QA → release → support ⸻ Looking for a long-term Swift Mobile Developer instead of a one-off coder? If you need a stable, scalable, and carefully crafted mobile product built with modern iOS technologies, let’s discuss your goals. I can provide a clear project plan, timeline, budget estimate, and technical strategy tailored to your vision. ⸻ 🔑 Technologies & Keywords (SEO Optimized) Swift Mobile Developer, Senior Swift Developer, iOS Developer, SwiftUI, UIKit, Combine, Objective-C, Apple Developer, iPhone App Development, iPad App, macOS App, watchOS App, HealthKit, Apple Health, MapKit, Google Maps, Mapbox, Kotlin, Android Developer, React Native, Flutter, TypeScript, JavaScript, Figma, UI/UX Design, MVP Development, High-Quality App Development, Mobile Architecture, Performance Optimization, Scalable Mobile Apps, Crypto Wallet App, Bitcoin, USDT, tokens, Quality, high-quality app ⸻ 📩 Send me a message, and I’ll share my Upwork scheduler link so we can find a time that works best for you

Hi there! I'm a experienced QA Engineer with 5+ years in test automation, including Playwright (TypeScript), JavaScript, Cypress, Appium and Selenium WebDriver. Skilled in building robust test suites for web and mobile apps, with hands-on experience. Proficient in CI optimization, test data management (AWS S3), and monitoring (Kafka, Kubernetes). Also mentored junior QAs and continuously worked on improving testing strategies and delivery speed. -Web/UI Testing -Mobile App Testing (iOS/Android) -Backend / API Testing -Performance Testing (JMeter) -Automated Testing (Cypress/Playwright/Appium/Selenium/JS) -Agile / Lean / Waterfall Methodologies Looking to add to your dedicated team or just need an additional resource for a specific project? I am available for both short term and longer term commitments. Learn more about me and feel free to get in touch with me to discuss the details!