Mykhailo

MYKHAILO MOZOLEVSKYI
QA Engineer | Mobile & Web Testing | Product Quality
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EXPERIENCE SUMMARY
QA Engineer QA Engineer with 4+ years of experience in web and
HOLYWATER TECH mobile products, experienced in establishing QA
10/2025 – present processes from scratch. Prior background as Editor-
Own end-to-end quality assurance for the web content platform and in-Chief in sports media shaped a strong product
key conversion funnels mindset: deep understanding of content platforms,
Ensure consistent user experience through UI/UX, responsive, user-facing quality, and business requirements.
localization, and cross-browser validation Worked as sole QA Engineer on multiple products -
Validate full subscription and payment lifecycle via Solidgate and Stripe, from exploratory discovery and test case design to
including trials, renewals, failed payments, cancellations, refunds, and full regression coverage, release validation, and
production checks onboarding new team members. Focused on
Validate weekly A/B experiments in GrowthBook, including understanding user flows, identifying edge cases
segmentation logic and experiment behavior early, and asking the right questions during
Ensure analytics data quality in Amplitude by validating events, requirements refinement. Experienced in analytics
properties, identity, sequencing, duplicates, and attribution event validation (Amplitude), A/B experiment
Execute and maintain Postman API collections to verify core user flows, integrity (GrowthBook), and payment lifecycle
analytics, and internal data integrity before releases testing. Designed AI-assisted testing workflows
Contribute to UI automation with Playwright (JavaScript/TypeScript) by (Cursor / Claude Code) for feature testing,
creating and debugging automated test scenarios automated test case updates, and regression
Use AI agents (Cursor / Claude Code) to analyze tasks, review code planning - combining deep product understanding
changes, generate test scenarios, and expand regression coverage with modern QA practices.
Perform smoke testing, hotfix validation, and release readiness checks
for weekly production deployments
SKILLS
Contribute to sprint planning and requirements refinement by Testing
identifying gaps, edge cases, and missing acceptance criteria Mobile Testing Web Testing Functional Testing
Use TestRail, Asana, and Miro to manage test coverage, task execution,
and user flow documentation Exploratory Testing Regression Testing API testing

Key Results: Payment Testing Bug reporting Test case writing
Grew automated test coverage from 20% to 60% of manual
regression expanding Playwright scenarios from 90 to 360 Analytics & Experimentation
Reduced smoke run time from 2.5 to 1.5 hours through automation Amplitude Analytics Validation
growth and smarter test planning
GrowthBook A/B Testing

Manual QA Engineer Tools & Platforms
POCKETBOOK Asana TestRail Postman Swagger Miro
06/2022 – 09/2025
Owned end-to-end QA for two products from inception to production Zephyr Trello DevTools Figma LambdaTest
release as sole QA Engineer Dev & Infrastructure
Tested Linux- and Android-based e-ink firmware and bundled apps
ADB Android Studio Putty Jenkins
(browser, reader, etc.) across ~10 devices on a 2-3 week release cycle
Led QA for Notes, a handwriting and text recognition application for a Ubuntu macOS GitLab
premium 10" e-ink device, validating recognition accuracy, complex
input scenarios, gesture interactions, and object handling Automation & AI
Led QA for Libby, an e-book library application, across the full Playwright Cursor Claude Code
PocketBook device lineup, including validation of rendering behavior
on both monochrome and color e-ink displays EDUCATION
Maintained structured test suites, investigated issues via ADB/PuTTY Telecommunications Engineer,
logs, and ensured UI consistency using Figma and PerfectPixel Odessa National Academy of
Performed API testing using Postman to validate backend functionality Telecommunications
Key Results: 2005–2010
Built 400+ test cases across firmware, Notes, and Libby as sole QA
Engineer LANGUAGES
Identified 200+ mid-to-crit priority bugs across 3+ years and 2 product Ukrainian English German
releases Native Intermediate Intermediate