Vasyl

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

PROFESSIONAL PROFESSIONAL EXPERIENCE
SUMMARY Software QA Engineer - PAR Technology Corporation
QA Engineer with extensive experience Sep 2019 - Apr 2026
• End-to-end API testing for a high-load SaaS platform.
testing high-load SaaS platforms,
complex APIs, and data-intensive • Backend validation via SQL (MS SQL, PostgreSQL, ClickHouse) and Kafka
event streams.
distributed systems. Specialized in
backend validation, API testing, database • Tested distributed microservices interactions and verified data
verification, and ensuring data integrity consistency.
across microservices architectures. • Cross-browser and mobile testing (iOS, Android) using BrowserStack.
• Regression testing and release validation in CI/CD pipelines.
CORE SKILLS • Automated repetitive testing workflows using Ranorex.
• Collaboration with developers and DevOps to investigate production
• API Testing: REST APIs (GET, POST, PUT, issues.
PATCH, DELETE), Postman, Swagger Quality Assurance Engineer - Dynamo Development, Inc.
• Backend Testing and Data Validation: Jul 2017 - Aug 2019
SQL queries, data integrity verification • Functional, smoke, and regression testing of web and mobile systems.
• Databases: MS SQL, PostgreSQL, • API validation and backend testing for client-server architecture.
ClickHouse, MongoDB • Created test cases, checklists, and bug reports in Jira.
• High-Load and Distributed Systems: • Participated in Agile ceremonies across the SDLC.
Kafka event validation, log analysis,
microservices QA Engineer - Skifia.biz
• Testing Types: Functional, Regression, Apr 2014 - Nov 2016
Smoke, Integration, API, Performance • Manual testing of e-commerce platforms and payment flows.
• Tools: Jira, Confluence, Azure DevOps, • Functional, regression, and load testing.
Jenkins, Git, DevTools, Qase.io • Prepared test plans, checklists, and bug reports in Jira.
• Automation and Performance Testing:
Ranorex (codeless), Apache JMeter, basic PROJECT HIGHLIGHTS
Python
• UI and Cross-Platform Testing: Data Central
BrowserStack, Figma design verification • Manual QA for a high-load SaaS platform focused on API, backend, and data
validation.
• Methodologies: Agile, Scrum, Kanban,
• REST API testing in Postman and Swagger; verification of payloads, status
CI/CD workflows
codes, and error handling.
• Validation of integrations between multiple POS systems, backend services,
EDUCATION and data-processing workflows.
DMN
Interregional Academy of Personnel • Functional, smoke, and regression testing of web-based business workflows
Management, Kyiv and internal modules.
Psychology (Medical Psychology) | 2004 - • Validation of integrations and core backend logic; bug reporting and fix
2008 verification.
First Kyiv Medical College, Kyiv • Testing of location-based functionality, including address, branch, region, and
Laboratory Diagnostics | 1994 - 1996 service-area related scenarios.
Мій Дім Онлайн
COURSES • Manual QA of web and mobile features, resident flows, forms, and
notifications.
• Software Testing Course - QALight • Regression and release validation, test documentation, and defect
• Automated Testing (Selenium / Java) - investigation.
QALight • Direct communication with customers and stakeholders to clarify issues,
reproduce defects, and validate expected behavior.
LANGUAGES Web Stores (Magento)
• Manual testing of catalog, search, product pages, cart, checkout, and
• Ukrainian - fluent
Ukrainian - native payment flows.
• Russian - native • Verification of promotions, shipping, returns, user accounts, and related
• English - upper-intermediate integrations.
• Basic load and performance testing of key e-commerce flows to check
stability under increased user activity.