Vladyslav Keidaliuk
QA Engineer at CHECK24 specializing in web, API, and E2E testing. I combine exploratory testing with Cypress/TypeScript and Selenium/C# automation to improve release confidence.
Munich, Germany · Web, API & E2E testing · ISTQB CTFL
Work Experience
Quality Assurance Engineer
Test customer-facing telecommunications comparison products, combining exploratory testing with API validation and automated E2E coverage to support reliable releases.
Key Responsibilities:
- Design and execute functional, regression, exploratory, and API tests for critical user journeys
- Develop and maintain Cypress and TypeScript E2E tests with an emphasis on stable, maintainable coverage
- Investigate failures across UI and API layers and report defects with clear reproduction steps, evidence, severity, and business impact
- Collaborate with developers and product stakeholders during planning, implementation reviews, defect resolution, and release validation
- Maintain test documentation and reusable API checks using Jira, Confluence, Bitbucket, and Bruno
- Integrate AI workflows (Claude, Cursor, Codex) into daily QA activities for test design, investigation, and documentation
- Build internal tools with AI integrations to accelerate and support QA processes
Key Achievements:
- Reduced full regression testing time across all projects from ~8 hours of manual execution down to 30–40 minutes (>90% time reduction) by designing and implementing automated E2E test suites for critical user journeys
- Prevented a critical production incident that would have caused significant financial losses by identifying and isolating high-severity business-logic defects early in development
- Reduced manual regression effort by 10x across multiple key user flows by developing internal tools to automate test data preparation
- Identified complex database-level type mismatches and schema issues early in the development lifecycle, preventing downstream API defects and backend sync failures
Tools & Technologies:
Junior Software Test Automation Engineer
Web application for online card games in a multiplayer environment. Developed and maintained automated tests, contributed to the Test Automation Framework, and participated in daily project meetings.
Key Responsibilities:
- Participated in daily meetings for project updates and collaboration
- Supported and refactored existing code
- Developed and documented test cases
- Executed and maintained test cases
- Developed automated tests for the web application
- Created and maintained automated UI tests
- Performed API testing
- Reported defects based on observed failures
- Contributed to the development of the Test Automation Framework
Tools & Technologies:
QA Engineer (Trainee)
Developed and maintained automated tests to ensure the quality and reliability of web applications.
Key Responsibilities:
- Created and executed automated UI tests using C#, Selenium, NUnit, JS, and Cypress
- Wrote and debugged automated API tests with RestSharp
- Designed and maintained comprehensive test cases to ensure critical functionality
- Reported and analyzed bugs to enhance application stability and performance
- Utilized tools such as Azure DevOps, Jenkins, Chrome DevTools, and Visual Studio to support testing processes
Tools & Technologies:
QA Engineer (Student)
Focused on test automation for web applications, gaining hands-on experience with modern tools and technologies.
Key Responsibilities:
- Created and executed automated UI tests using Selenium, NUnit, and Cypress
- Wrote and debugged automated API tests with RestSharp
- Designed and maintained test cases following best practices to ensure robust coverage
- Applied SpecFlow and BDD to write test scenarios in a clear and structured format
- Gained hands-on experience with tools like Azure DevOps, Cosmos DB, Chrome DevTools, and Visual Studio
- Strengthened knowledge of testing principles, including test case design, defect reporting, and the importance of automation in SDLC
Tools & Technologies:
About Me
Hello! I'm Vladyslav
I am a QA Engineer at CHECK24 in Munich with professional experience across exploratory, functional, regression, API, and E2E testing. My current automation stack is Cypress and TypeScript, supported by earlier experience with Selenium, C#, NUnit, and RestSharp.
I work closely with developers and product stakeholders to investigate failures, communicate risk, and support confident releases. I am ISTQB CTFL certified and continue to strengthen my automation and software-engineering skills.
I also use AI tools for test design, investigation, documentation, and code review, while treating verification, project conventions, confidentiality, and human judgment as mandatory quality gates.
Education & Certifications
Education
Undergraduate exchange studies in Computer Science
Completed an exchange semester focusing on Data Science, Global Software Engineering, and language studies.
Relevant Coursework:
Undergraduate studies in Computer Science
Completed seven of eight semesters with a GPA of 96/100 (Excellent). Acquired deep foundational knowledge in software development, object-oriented programming, design patterns, information security, and cloud technologies. I was unable to return to Ukraine for the final semester due to the worsening war-related security situation; the university subsequently ended my enrollment, so no degree was awarded.
Relevant Coursework:
Certifications
UA Laboratory: Automated Testing in .Net
Skills & Technologies
A practical overview of where I can contribute immediately, where I work independently, and which tools support my QA workflow.
Testing & QA
Core strengths for release confidence, regression coverage, and product quality.
AI-Assisted QA & Workflow
AI-assisted investigation, documentation, prompt workflows, and MCP tooling.
Soft Skills
Team habits that help clarify risks, communicate defects, and keep work moving.
Tools & Frameworks
Daily QA stack for automation, API checks, bug tracking, and delivery support.
Programming Languages
Languages used to build automated tests, utilities, and supporting tooling.
Databases & Cloud
Data, cloud, and delivery platforms used around testing workflows.
My Projects
Evidence-based public and anonymized work examples. Employer case studies intentionally exclude confidential product names, data, screenshots, internal systems, and business metrics.
Multiplayer Web Test Automation
An anonymized case study from EPAM covering automated UI and API testing for a multiplayer web application.
Key Highlights:
- Automated UI and API test development
- Framework maintenance and code refactoring
MVG Departure Monitor
A public iOS home-screen widget that displays live Munich public-transport departures and provides a configurable live board.
Key Highlights:
- Real-time departure data for configurable Munich stops
- Home-screen widget plus full-screen live board
Expenser: Full-Stack Expense Manager & Self-Hosted Infrastructure
A multi-currency finance application and self-hosted micro-cloud project demonstrating API quality, data integrity, security, and end-to-end systems thinking.
Key Highlights:
- Multi-currency budget aggregation with cached exchange rates
- Token authentication, strict CORS, Helmet, and payload limits