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Sergey Kosyak
Manual QA Engineer
SUMMARY

Manual QA Engineer with commercial experience in cross-platform
Mobile (iOS/Android) and Desktop GameDev testing. Experienced in
functional, regression, game mechanics, localization, and event
analytics testing. Skilled in mobile traffic analysis via Charles Proxy,
log debugging with Android Logcat, Xcode, ADB, test documentation
in Jira/Confluence, and basic SQL. Successfully acted as Temporary
QA Lead (4 months), driving test planning and feature delivery.
CON TACTS
SKILLS
Location
Functional testing regression testing Mobile Testing
Ivano-Frankivsk, Ivano-Frankivsk Oblast,
Web Testing Static testing Requirements analysis
Ukraine
Remote
Postman Swagger DevTools Xcode Firebase SQL
Email
Jira Bug reports Test Documentation
[open contact info](look above in the "contact info" section)
Phone
Project documentation SDLC process STLC process Agile [open contact info](look above in the "contact info" section)
SCRUM Kanban GitHub CI/CD Telegram
https://t.me/i_heavydirtysoul
WORK EXPERIEN CE LinkedIn
[open contact info](look above in the "contact info" section)
Manual QA Engineer at Mystic Flame 2025 - present kosyak-60bbaa3a1/
• Acted as Temporary QA Lead (4 mos), owning testing processes, task
estimation, and feature delivery. LAN GUAGES
• Authored and maintained Project Charters, defining project scope
and feature specifications. Ukrainian C2
• Executed Functional, Regression, Smoke, and Exploratory testing for
Mobile (iOS/Android) and Desktop projects. Russian C2
• Tested game mechanics, balance, UI flows, and character animations English B1
across various devices and screen resolutions.
• Conducted Localization testing for multi-language builds, verifying
text truncation, layout integrity, and fonts.
• Verified event analytics, tracking parameters, and custom metrics
implementation across user flows.
• Intercepted, analyzed, and debugged mobile client-server traffic on
iOS and Android using Charles Proxy.
• Analyzed crash reports and application logs using Android Logcat,
Xcode Console, and ADB.
• Executed basic SQL queries to verify backend data persistence and
account state sync.
• Created Test Cases and Checklists in Jira/Confluence; tracked defects
and collaborated in Agile/Scrum teams.
EDUCATION

Occupational and Physical Therapy at Zaporizhzhia National 2017-2021
University
ADDITION AL COURSES AN D TRAIN IN GS

QA Manual with AI at Hillel IT School 2025
https://certificate.ithillel.ua/view/13351002 EXCELLENT 1ST PLACE

HOBBY

Passionate about computer technology and innovations, constantly
exploring new gadgets and software. Enthusiast of computer games,
with a strong interest in game mechanics, balance, and user
experience. Avid reader of technical literature and fiction, always
exploring new genres and authors.