Vasyl

VASYL SUDIAKOV
Kyiv, Ukraine | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Telegram: @StahlHerzoG | Open to remote
work (EU / US)

Software QA Engineer (API / Backend / High-Load Systems / SaaS / Databases)

PROFESSIONAL SUMMARY
QA Engineer with extensive experience testing high-load SaaS platforms, complex APIs, and
data-intensive distributed systems. Specialized in backend validation, API testing, database verification,
and ensuring data integrity across microservices architectures. Proven ability to identify critical defects
early through deep root-cause analysis, strong regression strategies, and collaboration with engineering
teams. Experienced validating REST APIs, event-driven systems (Kafka), and large-scale data pipelines
supporting production platforms.

CORE SKILLS
• API Testing: REST APIs (GET, POST, PUT, PATCH, DELETE), Postman, Swagger
• Backend Testing and Data Validation: SQL queries, data integrity verification
• Databases: MS SQL, PostgreSQL, ClickHouse, MongoDB
• High-Load and Distributed Systems: Kafka event validation, log analysis, microservices
• Testing Types: Functional, Regression, Smoke, Integration, API, Performance
• Tools: Jira, Confluence, Azure DevOps, Jenkins, Git, DevTools, Qase.io
• Automation and Performance Testing: Ranorex (codeless), Apache JMeter, basic Python
• UI and Cross-Platform Testing: BrowserStack, Figma design verification
• Methodologies: Agile, Scrum, Kanban, CI/CD workflows

PROFESSIONAL EXPERIENCE
Software QA Engineer - PAR Technology Corporation | Sep 2019 - Jan 2026
• End-to-end API testing for a high-load SaaS platform.
• Backend validation via SQL (MS SQL, PostgreSQL, ClickHouse) and Kafka event streams.
• Tested distributed microservices interactions and verified data consistency.
• Cross-browser and mobile testing (iOS, Android) using BrowserStack.
• Regression testing and release validation in CI/CD pipelines.
• Automated repetitive testing workflows using Ranorex.
• Collaboration with developers and DevOps to investigate production issues.
Quality Assurance Engineer - Dynamo Development, Inc. | Jul 2017 - Aug 2019
• Functional, smoke, and regression testing of web and mobile systems.
• API validation and backend testing for client-server architecture.
• Created test cases, checklists, and bug reports in Jira.
• Participated in Agile ceremonies across the SDLC.
QA Engineer - Skifia.biz | Apr 2014 - Nov 2016
• Manual testing of e-commerce platforms and payment flows.
• Functional, regression, and load testing.
• Prepared test plans, checklists, and bug reports in Jira.

EDUCATION
Psychology (Medical Psychology) - Interregional Academy of Personnel Management, Kyiv (2004 - 2008)
Laboratory Diagnostics - First Kyiv Medical College, Kyiv (1994 - 1996)

COURSES
• Software Testing Course - QALight
• Automated Testing (Selenium / Java) - QALight