Vadim

Vadym Semko
Unity Developer
Ukraine, Dnipro • [відкрити контакти](див. вище в блоці «контактна інформація») • contra.com/RoninDvlpr • github.com/RoninDvlpr

PROFESSIONAL SUMMARY
Adaptive Unity Developer with 7 years of experience in full-cycle mobile game development.
Proficient in C# and SOLID principles, having delivered 30+ projects ranging from rapid
prototypes to full commercial releases. Seeking to apply established expertise while expanding
into broader technical feature sets and new domains.

CORE COMPETENCIES
Engine & Languages: Unity, C# / .NET.

Architecture: OOP, SOLID, Design Patterns, Event-driven & Data-driven approaches, Code
Refactoring, Reusable module creation.

Physics & Simulation: 2D/3D Dynamics & Kinematics, Joints & Effectors, Spatial Queries
(Raycasts/Overlaps), Collision Matrix Optimization, Character & Vehicle Controllers.

Animation & VFX: DOTween, Unity Animator, 3D Humanoid Animations Integration, Spine &
DragonBones Integration, Particle Systems.

UI & UX: Adaptive UI (uGUI), Editor Scripting (IMGUI), Unity Input System.

Backend & Multiplayer: Photon (Turn-based), PlayFab (Matchmaking, User Data Persistence),
OpenAI API, Google Play Services, Custom APIs, Cryptography (BouncyCastle).

Services Integration: Analytics (Firebase/Unity Analytics/GameAnalytics), Advertising
(AdMob/Unity Ads), IAP.

Distribution & Content Delivery: Android/iOS Deployment & Store Compliance (including
GDPR/COPPA), Cross-Platform Builds (PC, WebGL), Addressables.

Tools: Git (GitHub/GitLab), AI Assistants (GitHub Copilot, ChatGPT, Gemini), JIRA, Adventure
Creator, Adobe Illustrator, Photoshop.

Additional Skills: Systems Game Design.

PROFESSIONAL EXPERIENCE
Unity Developer | Orion Gaming World | October 2024 - December 2025
Acted as the primary developer responsible for the full lifecycle of mobile titles for a small-scale
studio.
Shipped a mobile (iOS/Android) title for children, managing everything from core loops to UI
systems.

Ensured full GDPR & COPPA compliance for data collection, meeting strict Google Play
requirements for children-directed games via filtered advertising and privacy protocols.

Integrated Spine animations with synchronized body-part colliders for precise gameplay
interaction.

Implemented Adaptive UI to ensure visual consistency across various devices' aspect ratios.

Unity Game Developer (Freelance/Consultant) | January 2026 - Present & May 2019 -
September 2024
Operated as a full-cycle developer for international clients, delivering 30+ functional prototypes
and MVP products.

Rapid Prototyping: Translated abstract game design concepts into playable MVPs for various
genres, focusing on clean, modular code for ease of scalability.

SDK Integration: Integrated an array of third-party SDKs for analytics, monetization, social
sharing, and multiplayer functionality (Photon, Playfab).

Consultation: Consulted non-technical clients, helping define project scopes and feature sets.
Provided game design insights, refining gameplay balance and UX flow to improve player
retention for client projects.

Leadership: Acted as the primary technical stakeholder, mentoring a junior developer and
ensuring code quality through peer code reviews and architectural guidance.

SELECTED PROJECTS
Gameplay videos and live builds for the projects below are available at: contra.com/RoninDvlpr

Dice Hero | Mobile dice-poker and auto-battler hybrid
● Engineered a system of interconnected core (dice poker, auto-battler) and meta
(CCG-style characters, squad management) mechanics from first iteration to commercial
launch.
● Oversaw the implementation of the live monetization store by a junior developer.

Dancing Animals | Mobile kids’ educational game
● Developed core gameplay loops, refactored components to improve stability and support
new features, and integrated Spine animations with dynamic physics colliders.
 ● Navigated complex mobile store privacy compliance to successfully publish a
directed-at-children application.

Life Tower | Mobile/WebGL adaptation of the work-life balance tabletop game
● Delivered the educational project in accordance with the Estonian Gender Equality
Commissioner’s Office requirements.
● Implemented classroom social multiplayer mechanics using PlayFab.

EDUCATION
Master's Degree in Information Security and Systems Engineering | Dnipro National
University | 2014