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Serge Shcherbinka

@sergeshcherbinka

Senior QA Engineer focused on Web, Mobile, API and automation testing. Python, Selenium, Playwright, Pytest. AI, fintech, crypto and B2B SaaS.

Turkey

Message

What I'm looking for

I'm open to international remote opportunities where I can improve product quality across web, mobile, backend, and distributed systems through hands-on automation, API and performance testing, and release validation. I'm particularly interested in technically challenging products, strong engineering teams, and environments where QA is involved early in the development process.

Senior QA Engineer with 16+ years of experience in software testing across web, mobile, API, fintech, crypto, healthcare, e-commerce, and consumer products.

My main focus is functional and integration testing, API testing, test automation, regression testing, requirements analysis, and improving overall product quality. I have hands-on experience with Python, Selenium, Playwright, Pytest, Requests, Postman, Swagger, Git, CI/CD, SQL, Charles, Android Studio, Xcode, and test management systems such as Allure TestOps and Qase.

In recent projects, I have worked with AI-powered products, including AI models for profile description generation, customer support chatbots, and AI chatbots for cryptocurrency sales and customer support. I have also tested blockchain-based products within the TRON ecosystem, including TRC-20 transactions, USDT transfers, payment processing, and integrations with smart contracts.

I also have experience with mobile testing on iOS and Android, web and cross-browser testing, performance testing with JMeter and Locust, analytics validation, third-party integrations, and testing complex business and payment flows.

I enjoy working closely with developers, product managers, designers, and other QA engineers to identify risks early, improve testing processes, and deliver reliable products. I am particularly interested in test automation, API testing, AI-powered products, and modern QA engineering practices.

Experience

Work history, roles, and key accomplishments

Current

Senior QA Engineer

Current

Dragon Money

Jan 2025 - Present (1 year 9 months)

Performed end-to-end testing of a web-based gaming platform, including UI automation with Python, Selenium, and Pytest, REST API testing, and payment systems integration. Increased automated regression coverage from ~30% to ~70% and reduced regression cycle time from ~2-3 days to ~6-8 hours.

Python Pytest Selenium REST APIs Payment Systems Testing Automation Regression Testing

Senior QA Engineer

FeeSaver

Jan 2024 - Jan 2025 (1 year)

Tested a fintech platform on the TRON ecosystem, including blockchain transaction validation (TRC-20/USDT), Telegram bot testing, and REST API testing. Identified inconsistencies between blockchain processing and UI display, and covered edge cases including retries, idempotency, and delayed confirmations.

Blockchain Tron TRC20 USDT REST APIs Edge Cases

Senior QA Engineer

RemedyLogic

Jan 2023 - Jan 2025 (2 years)

Tested a healthcare SaaS platform, including GraphQL API testing, cross-browser and integration testing. Conducted performance testing using JMeter, identified API bottlenecks under load, and contributed to ~30% reduction in response time after fixes.

Healthcare SaaS GraphQL API Testing Cross Browser Testing Integration Testing JMeter Performance Testing

Senior QA Engineer

Gloria Jeans

Jan 2022 - Jan 2023 (1 year)

Tested a fashion retail mobile app (iOS/Android), including backend and API testing, network traffic analysis with Charles and Fiddler, and push notifications and Firebase analytics testing. Reduced mobile/backend integration defects by ~25% and improved bug reproducibility via deep network and log analysis.

Mobile Testing iOS Android Backend Testing API Testing Charles Fiddler Push Notifications Firebase Locust Performance Testing

Senior QA Engineer

SberDevices

Jan 2020 - Jan 2022 (2 years)

Tested smart home devices and Canvas apps, including web and mobile testing, frontend validation, and smart device ecosystem testing. Participated in release and regression cycles.

Smart Home Web Testing Mobile Testing Front end Testing Regression Testing Release Management