Андрій

Andrii Kostrov
Middle Manual QA Engineer | Web & CMS Testing | API/SQL
Ukraine (Remote) | [open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | TG: @Andrii_Kostrov

PROFESSIONAL SUMMARY

Manual QA Engineer with 4.5 years of hands-on experience testing web applications, including e-commerce platforms.
Skilled in functional, regression, and smoke testing, writing detailed bug reports and test documentation, and working
closely with development teams throughout the release cycle. Actively uses AI tools (Claude) in daily QA-adjacent work
— requirement analysis, test documentation drafting, structured decision-making. Practical experience with REST API
testing (Postman), Chrome DevTools for defect investigation, and SQL for backend data validation. Created 3,000+
detailed bug reports across 120+ web projects. Strong attention to detail and ability to work independently.

PROFESSIONAL EXPERIENCE

Manual QA Engineer — White Label Agency
Nov 2021 – May 2026
Performed functional, regression, and smoke testing of web applications — including e-commerce sites with product
catalogs, shopping carts, and payment flows
Tested REST APIs using Postman — validating HTTP methods, status codes, JSON payloads, and data exchange
between system components
Applied SQL queries to validate data integrity and backend consistency
Investigated defects using Chrome DevTools — analyzing network requests, console errors, and layout issues
Created 3,000+ detailed bug reports with clear reproduction steps and supporting evidence
Maintained test documentation — test cases and checklists — across multiple concurrent client projects
Verified UI implementation against Figma and Adobe XD designs using PerfectPixel
Collaborated with developers to clarify requirements, discuss edge cases, and verify fixes before release
Used AI tools (Claude) daily to analyze requirements and structure test documentation
Managed up to 4–5 concurrent projects independently without close supervision
Identified a critical tax miscalculation defect in a payment form on a US e-commerce site before launch, preventing
incorrect customer charges
Prior Professional Experience
2010 – 2021 | Ukraine
• Roles in sales and client-facing services before transitioning into QA; developed strong communication and
negotiation skills through direct client work.

TECHNICAL SKILLS
Testing Types: Functional, Regression, Smoke, UI, Exploratory, Cross-browser, Cross-platform, Acceptance Testing
Tools: Postman, Chrome DevTools, ClickUp, Userback, Figma, Adobe XD, PerfectPixel
AI Tools: Claude — daily use for requirement analysis, test documentation
API & Database: REST API, HTTP, JSON, SQL, PostgreSQL
Web Technologies: HTML/CSS, client-server architecture
Soft Skills: Attention to Detail, Analytical Thinking, Self-organization, Teamwork

EDUCATION & CERTIFICATIONS
Master of Engineering, Mechanical Engineering
Sumy State University — 2004–2010
The Fundamentals of Software Testing
QATestLab Training Centre — Aug 2021