Василь

VASYL BABII  Cherkasy, Cherkasy Oblast
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General QA Engineer  [відкрити контакти](див. вище в блоці «контактна інформація»)
Summary
QA Engineer with 10+ years of experience in testing web, desktop, and mobile applications. Experienced in
working with microservice architectures, API testing, and automation using Java (Selenide) and JavaScript
(Playwright, WebDriverIO). Strong background in building QA processes, working as both a single QA engineer
and part of QA teams. Experienced in full QA lifecycle including test planning, regression strategy, automation
testing and release verification. Handson experience testing AI-powered features including prompt validation,
response consistency testing, and generated output verification. Familiar with both FinTech and HealthTech
domain concepts including payment processing flows, financial transaction validation, healthcare data
workflows, and testing systems that require high reliability and data accuracy.

Skills
Manual Testing
Functional, Non-Functional, Web and
Mobile testing, Regression, Smoke,
Sanity, Acceptance, Static & Dynamic
Testing, Cross-browser, Cross-patform
testing, SDLC, STLC
Microservices Testing
Kafka events, WebHooks, gRPC
Test Automation
Java (Selenide), JavaScript
(Playwright, WebDriverIO)
API Testing
REST API, WebSockets, Postman,
Swagger, DevTools, Charles Proxy
Accessibility Testing
WCAG 2.1 / 2.2 (Level A, AA), Keyboard navigation,
ARIA, Semantic HTML
Test artefacts
Test plan, checklists, test cases, test
reports, traceability matrix
Software development methodology
Agile (Scrum, Kanban)
AI Testing
Prompt validation, response
consistency testing, output
verification
Database testing
My SQL, PostgreSQL
Monitoring / Log Analysis
Grafana, ElasticSearch, New Relic
Bug Tracking and Test Management
Jira, TestRail, Confluence, Trello,
Mantis
CI/CD
Docker, Jenkins, GitLab, GitHub
Work experience
General QA Engineer Mar 2025 - Mar 2026
Mascode
Testing distributed microservice architecture (10+ services), API testing and validation of service interactions.
Automation of regression scenarios using Selenide, log analysis using Grafana and ElasticSearch. Participation in
release verification and production validation, cross-browser and cross-platform testing. Creation and
maintenance of test documentation (test cases, checklists, reports)
Responsibilities:
Tested a distributed system with 10+ microservices
Checked end-to-end flows across services to make sure data was passed correctly
Performed regression and smoke testing
Cross-browser and cross-platform testing
Created and maintained test cases, checklists, and reports
API & Integrations:
Tested APIs using Postman and Swagger
Verified how services interact with each other (requests, responses, data consistency)
Tested error scenarios like timeouts, invalid responses and partial failures
Async / Kafka:
Worked with Kafka based communication between services
Checked that events were sent and processed correctly
Looked at cases with delays, duplicate events and message ordering issues
Automation:
Wrote and maintained autotests using Selenide (Java)
Covered main user flows for regression testing
Logs & Debugging:
Used Grafana and ElasticSearch to check logs
Investigated issues across multiple services
Helped find root causes, especially when problems were between services
AI related features:
Tested AI functionality (prompt validation, response checks)
Verified that responses were stable and made sense
Tools: Selenide (Java), Postman, Grafana, ElasticSearch, Jira, Confluence, Git, DevTools, Swagger, Kafka, AIO Test,
(Jira plugin), AI tools (Chat GPT, Github for Capilot, Codex)

General QA Engineer Mar 2022 - Feb 2025
Star Global
Worked as the sole QA engineer responsible for establishing the QA process, defined regression strategy and
release verification procedures, created test documentation and executed full testing cycle, API testing and
integration validation, close collaboration with developers and product managers
Responsibilities:
Worked as the only QA on the project, owning the whole testing process
Set up QA workflows from scratch (test approach, regression, release checks)
Worked closely with developers and product managers
Helped improve product quality through regular feedback and testing
Covered full testing cycle: from requirements review to release verification
Performed regression and checked builds before release
Created and maintained test cases, checklists, and reports
API & Integrations:
Tested APIs and checked integrations between services (Wordpress, Breezy)
Made sure data was handled correctly
AI related features:
Tested AI functionality (prompt validation, response checks)
Checked that responses were consistent and made sense
Tools: Postman, Swagger, Jira, Confluence, TestRail, DevTools, WordPress, Breezy, AI tools (Chat GPT, Capilot)

QA Engineer Sep 2020 - Feb 2022
TRIARE
Testing desktop and mobile applications. Working both as single QA and within small QA teams. Setting up QA
processes for new projects. Writing test plans, test cases, checklists, and reports. Mentoring junior QA engineers
Responsibilities:
Tested web, desktop, and mobile applications
Performed API testing
Perfomed regression, smoke and acceptance testing before releases
Covered full testing cycle: from requirements analysis to release verification
Worked as the only QA on the project
Set up QA workflows from scratch and owned the testing process
Created and maintained test cases, checklists, and reports
Debugging:
Investigated issues using logs and monitoring tools
Collaboration:
Worked closely with developers and product managers
Helped clarify requirements and fix issues
Tools: Postman, Swagger, DevTools, Charles Proxy, Jira, TestRail, Confluence, Git, Jenkins, Docker, Xcode, Android
studio

QA Engineer Oct 2019 - Jun 2020
MEV LLC
Testing desktop application for smart lamp device control. Firmware testing and log analysis. Automation test
implementation. Root cause analysis using logs
Responsibilities:
Tested a desktop application for smart lamp control (IoT project)
Checked end-to-end flow between device, backend and UI to make sure device state was reflected correctly
MQTT / Communication:
Worked with MQTT communication between device and backend
Verified that messages were sent to correct topics with valid payload
Checked data like device state, brightness, on/off status
Tested edge cases: reconnect after connection loss, missing messages, duplicates
Made sure updates from the device were correctly shown in the UI
Telemetry / Data:
Verified telemetry data coming from the device (state, values, changes)
Compared data between device, backend, and UI
Checked event order and basic timing (no obvious delays or mismatches)
Looked at how fast the system updates telemetry after changes
Firmware:
Tested device behavior after firmware updates
Checked that everything is stable after update
Logs & Debugging:
Looked into application and device logs
Investigated issues between device and backend
Helped find root causes when issues were not obvious
Tools: Postman, Swagger, Jira, Confluence, TestRail, MySQL, PostgreSQL, DevTools, MQTT broker, Selenide, Java

QA Engineer Mar 2015 - Oct 2019
 QATestLab
Testing mobile and desktop applications. Working both as a single QA and in QA teams. Creating and maintaining
detailed test documentation. Regression and smoke testing across multiple releases
Responsibilities:
End-to-end testing for web, desktop, and mobile applications
Investigated issues and identified root causes
Handled functional and regression testing
Tools: Jira, DevTools, log analysis tools, mobile testing tools (emulators, real devices), TestRail

Education
Master's Degree in Software 2012 - 2014
State Technological University

Bachelor degree in Software 2010 - 2012
Cherkasy Polytechnic College

Languages
English - Upper-intermediate (B2)
Ukrainian - Native

Certifications
WebDriverIO Automation Course - Star Global
Playwright Automation Course - Star Global
Manual QA Course - QATestLab
WebDriverIO Course - Udemy