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I'm Serhii Sychyk, a Senior QA Engineer with 6+ years of experience in manual testing of web applications, SaaS platforms, and high-traffic online services. I specialize in functional, regression, integration, end-to-end, UI/UX, and API testing, with hands-on experience in REST API testing, cross-browser testing, SQL databases, and monitoring tools. I collaborate closely with cross-functional teams in Agile/Scrum to triage issues and ensure release readiness. I also have basic automation experience using Playwright, Cypress, and Selenium to support smoke and regression testing.…I'm Serhii Sychyk, a Senior QA Engineer with 6+ years of experience in manual testing of web applications, SaaS platforms, and high-traffic online services. I specialize in functional, regression, integration, end-to-end, UI/UX, and API testing, with hands-on experience in REST API testing, cross-browser testing, SQL databases, and monitoring tools. I collaborate closely with cross-functional teams in Agile/Scrum to triage issues and ensure release readiness. I also have basic automation experience using Playwright, Cypress, and Selenium to support smoke and regression testing.

Serhii Sychyk

QA Engineer, Web Developer, Front-End Developer, +2

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I'm Serhii Sychyk, a Senior QA Engineer with 6+ years of experience in manual testing of web applications, SaaS platforms, and high-traffic online services. I specialize in functional, regression, integration, end-to-end, UI/UX, and API testing, with hands-on experience in REST API testing, cross-browser testing, SQL databases, and monitoring tools. I collaborate closely with cross-functional teams in Agile/Scrum to triage issues and ensure release readiness. I also have basic automation experience using Playwright, Cypress, and Selenium to support smoke and regression testing.…I'm Serhii Sychyk, a Senior QA Engineer with 6+ years of experience in manual testing of web applications, SaaS platforms, and high-traffic online services. I specialize in functional, regression, integration, end-to-end, UI/UX, and API testing, with hands-on experience in REST API testing, cross-browser testing, SQL databases, and monitoring tools. I collaborate closely with cross-functional teams in Agile/Scrum to triage issues and ensure release readiness. I also have basic automation experience using Playwright, Cypress, and Selenium to support smoke and regression testing.

Available to hire

I’m Serhii Sychyk, a Senior QA Engineer with 6+ years of experience in manual testing of web applications, SaaS platforms, and high-traffic online services. I specialize in functional, regression, integration, end-to-end, UI/UX, and API testing, with hands-on experience in REST API testing, cross-browser testing, SQL databases, and monitoring tools.

I collaborate closely with cross-functional teams in Agile/Scrum to triage issues and ensure release readiness. I also have basic automation experience using Playwright, Cypress, and Selenium to support smoke and regression testing.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Ukrainian

Fluent

English

Advanced

Russian

Fluent

Work Experience

Senior QA Engineer at Proton Inc

March 1, 2025 - September 1, 2025

Tested account-related functionality across web portal and companion mobile apps (authentication, account, subscriptions). Performed manual functional, regression, and acceptance testing for web and mobile releases in an Agile environment. Verified UI/UX of web pages and responsive views, ensuring consistency with design specifications and platform guidelines. Created and maintained test cases, checklists, and test plans for web and API scenarios in test management tools. Worked closely with developers, designers, and product managers to triage issues and align on release readiness.

Senior QA Engineer at RiseApps

February 1, 2024 - March 1, 2025

Led QA for a casino platform web application and online slot games, ensuring functionality, security, and scalability. Conducted manual functional, regression, integration, and basic security testing for registration, KYC, payments, withdrawals, and gameplay. Performed cross-browser and cross-platform testing (desktop and mobile web) to keep UX and performance consistent across major browsers. Used Postman, Swagger, Qase.io, Grafana, Metabase, Smartlook, and related tools to validate APIs and monitor production issues. Ensured platform compliance with regulations (e.g. GDPR, PCI-DSS) and supported launch to ~70K active users, delivering 15+ slot games. Web educational project: tested a web application for displaying and managing educational content in an Agile/Scrum environment. Created and maintained test documentation in Qase.io and Confluence; executed functional, regression, smoke, and UI/UX tests. Built basic automation for critical web flows using Playwright + Python to speed up

Senior QA Engineer at Under NDA

October 1, 2023 - February 1, 2024

Led QA for an AI-based chat system, covering user-facing web interface and backend services. Performed end-to-end, functional, and non-functional testing of chat flows, integrations, and edge-case scenarios. Designed and maintained automated regression checks using Playwright; integrated a local LLM to help validate response quality and detect anomalies. Collaborated with developers and ML engineers to validate stability, performance, and quality of LLM integration.

Senior QA Engineer at Glamorous Goat

December 1, 2022 - February 1, 2024

Tested a native iPadOS app backed by web services and content management. Executed functional and regression testing using detailed checklists, focusing on content accuracy and usability. Performed API testing with Proxyman and Postman and analysed issues using logs and browser developer tools. Supported releases via TestFlight and App Store and presented demos to clients, gathering feedback for further improvements.

QA Engineer at VARTEQ

December 1, 2020 - September 1, 2023

Played a key QA role in educational SaaS web platform within a 50+ people team. Created and executed detailed regression and smoke test cases across multiple browsers and devices. Contributed to automated smoke tests (UI/API) to speed up release validation and reduce manual regression scope.

QA Engineer at Solution Mentors

October 1, 2019 - December 1, 2020

Ensured high product quality for a creative management SaaS platform, maintaining comprehensive QA documentation. Performed functional, regression, and usability testing and executed basic security checks using SQL and phpMyAdmin in an Agile team.

Junior QA Engineer at Upwork (Part-time)

January 1, 2019 - December 1, 2020

Trading System Web App: contributed to QA of a trading web platform with AI-based predictions; used Postman for API testing and Cypress + JavaScript for automated checks.

Junior QA Engineer at Upwork

January 1, 2019 - December 1, 2020

Trading System Web App: contributed to QA of a trading web platform with AI-based predictions; used Postman for API testing and Cypress + JavaScript for automated checks.