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QA Tester (Games, Functional)
- Considering positions:
- QA Tester (Games, Functional), Video Editor, Short-form Specialist, Game Designer (Level, Mechanics), сценарист ігрових квестів та діалогів, Esports Coach, Analyst, Data Scraper, Parser, Audio Transcriber, Editor, ігровий копірайтер та автор гайдів, Content Creator, SMM
- Age:
- 22 years
- City of residence:
- Odesa
- Ready to work:
- Remote
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KOSTIANTYN YERIN
Technical QA Tester | Game Systems & Technical Designer
Bucharest, Romania | [open contact info ](look above in the "contact info" section) | [open contact info ](look above in the "contact info" section)
LinkedIn: [open contact info ](look above in the "contact info" section) | Portfolio: Notion Portfolio Workspace
SKILLS
• Technical QA & Tools: Functional, Regression & UI/UX Testing, Bug Lifecycle (Jira), Compliance &
Asset Review, Python (Requests/BS4), REST APIs.
• Game & Tech Design: Node Graphs (Visual Scripting), Event-Driven Architecture, FSM, Entity
Optimization & Object Pooling, Lua, XML Data Setup.
EXPERIENCE
Game QA Tester (NDA Protected) | Major Game Development Studio | Jan 2026 – Present
• Execute functional, regression, UI, and integration testing on live builds under strict NDA.
• Isolate and document physics breaks, desyncs, and complex edge cases via internal bug trackers.
• Audit game assets, level logic, and UGC systems against design docs and technical compliance
rules.
• Collaborate directly with engineers to optimize reproduction pipelines and validate player UX.
Technical Designer & UGC Developer | Independent / Modding | Oct 2025 – Present
• Gameplay Systems: Built competitive and rogue-lite modes (Survivor's Throne, Hook Wars,
Alchemy's Curse) featuring trajectory physics, custom HUDs, and meta-progression.
• Optimization: Refactored spawner logic from polling to event-driven execution, eliminating lag spikes
under engine entity bottlenecks (up to 1,000 entities).
• Modding & Scripting: Authored modular Lua scripts and XML databases for custom NPC behaviors,
reactive dialogue trees, and combat tuning in S.T.A.L.K.E.R. Anomaly.
• Dev Tools: Built Python scrapers to convert doc tables into structured JSON/CSV datasets;
developed an internal context-aware Gemini API tool for documentation chunking.
Esports Analyst & Coach | Independent | Oct 2020 – Present
• Analyzed tactical shooter macro loops, TTK balance, player decision trees, and engagement
heatmaps to formulate data-driven competitive balancing frameworks.
AWARDS & RECOGNITION
• Silver Award — HoYoverse UGC Guide Contest (Sep 2026): Engine optimization & zero-lag spawner
logic.
• Bronze Award — HoYoverse UGC Guide Contest (Aug 2026): Data-driven game loops & entity
management.
• Outstanding Works Prize — HoYoverse UGC Guide Contest (Jul 2026): Complex node logic
breakdown.
EDUCATION & LANGUAGES
Kharkiv State Academy of Physical Culture: Bachelor's in Esports Coaching & Analytics (Defense:
98/100, 2025)
Languages: English (Professional Working / B2), Ukrainian (Native), Russian (Native)
Technical QA Tester | Game Systems & Technical Designer
Bucharest, Romania | [
LinkedIn: [
SKILLS
• Technical QA & Tools: Functional, Regression & UI/UX Testing, Bug Lifecycle (Jira), Compliance &
Asset Review, Python (Requests/BS4), REST APIs.
• Game & Tech Design: Node Graphs (Visual Scripting), Event-Driven Architecture, FSM, Entity
Optimization & Object Pooling, Lua, XML Data Setup.
EXPERIENCE
Game QA Tester (NDA Protected) | Major Game Development Studio | Jan 2026 – Present
• Execute functional, regression, UI, and integration testing on live builds under strict NDA.
• Isolate and document physics breaks, desyncs, and complex edge cases via internal bug trackers.
• Audit game assets, level logic, and UGC systems against design docs and technical compliance
rules.
• Collaborate directly with engineers to optimize reproduction pipelines and validate player UX.
Technical Designer & UGC Developer | Independent / Modding | Oct 2025 – Present
• Gameplay Systems: Built competitive and rogue-lite modes (Survivor's Throne, Hook Wars,
Alchemy's Curse) featuring trajectory physics, custom HUDs, and meta-progression.
• Optimization: Refactored spawner logic from polling to event-driven execution, eliminating lag spikes
under engine entity bottlenecks (up to 1,000 entities).
• Modding & Scripting: Authored modular Lua scripts and XML databases for custom NPC behaviors,
reactive dialogue trees, and combat tuning in S.T.A.L.K.E.R. Anomaly.
• Dev Tools: Built Python scrapers to convert doc tables into structured JSON/CSV datasets;
developed an internal context-aware Gemini API tool for documentation chunking.
Esports Analyst & Coach | Independent | Oct 2020 – Present
• Analyzed tactical shooter macro loops, TTK balance, player decision trees, and engagement
heatmaps to formulate data-driven competitive balancing frameworks.
AWARDS & RECOGNITION
• Silver Award — HoYoverse UGC Guide Contest (Sep 2026): Engine optimization & zero-lag spawner
logic.
• Bronze Award — HoYoverse UGC Guide Contest (Aug 2026): Data-driven game loops & entity
management.
• Outstanding Works Prize — HoYoverse UGC Guide Contest (Jul 2026): Complex node logic
breakdown.
EDUCATION & LANGUAGES
Kharkiv State Academy of Physical Culture: Bachelor's in Esports Coaching & Analytics (Defense:
98/100, 2025)
Languages: English (Professional Working / B2), Ukrainian (Native), Russian (Native)
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The candidate's resume is posted at https://www.work.ua/resumes/20661649/