Сергій

Serhii Chekun
Software Engineer | C# .NET | Unity
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Rivne, Ukraine

Portfolio github.com/Chekushka [open contact info](look above in the "contact info" section)

Summary
Software Engineer with 3+ years of commercial experience in the C# ecosystem, specializing in both Unity
and .NET Backend systems. I have successfully shipped multiple high-performance projects with 50,000+
downloads, leveraging SOLID, Dependency Injection, and Async/Await to build scalable architectures.
Expert in DOTS-based optimization and architecting robust Web APIs for high-traffic environments.
A proactive problem-solver with a proven track record in technical mentorship and code reviews.
Dedicated to delivering clean, maintainable code that bridges the gap between interactive user experiences
and high-performance server-side logic.
Additionally, I have experience developing Python-based applications and implementing Machine Learning
models in cloud environments (AWS/​Azure).

Skills
Core & Languages Unity Engine & Graphics
C#, .NET, Python, SQL, OOP, SOLID Principles, Unity 2D/​3D, URP (Universal Render Pipeline),
Design Patterns, Algorithms & Data Structures, Shader Graph, DOTS (ECS, Job System, Burst), New
LINQ, Clean Architecture, Async/Await (Tasks), Input System, Physics, Profiling & Optimization,
Cross-platform application development WebGL.

Plugins & Assets SDKs & Integrations
DOTween, Cinemachine, Feel, TextMeshPro, Mobile Monetization (AdMob, IronSource), Social
Addressables, UniTask, Newtonsoft.Json. Integration (Facebook SDK), REST API, Entity
Framework Core (basics), SQL, Custom Analytics &
Tools Auth Systems, Machine Learning (Foundational),
Git /​GitHub, AWS /​Azure (Cloud Deployment), Data Analysis
Docker, Visual Studio, JetBrains Rider, Figma,
Trello/​Jira. English
Upper-Intermediate

Professional Experience
05/2023 – Present Self-Employed
Ukraine Unity Developer
Orchestrated full-cycle game development for mobile and web platforms,
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launching multiple titles that each surpassed 50,000 downloads.
Engineered and integrated custom backend solutions, including analytics
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platforms, referral systems, and user authorization services to support scalable
player bases.
Developed a unique web-based puzzle game with seamless Telegram Bot
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integration, showcasing cross-platform versatility.
Implemented robust monetization and social features using AdMob, IronSource,
•

and Facebook SDKs, ensuring profitable project economics.
Optimized game performance and code architecture by leveraging modern Unity
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technologies like DOTS and the New Input System.
Enhanced player engagement and "game feel" by utilizing advanced toolkits such
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as Cinemachine, DOTween, and Feel.
09/2024 – 05/2025 Independent Project | .NET Backend & Unity Integration
Ukraine C# / .NET Developer
Developed a scalable ASP.NET Core REST API with EF Core & PostgreSQL to
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manage states for 50,000+ players.
Implemented JWT-based auth and Docker containerization, ensuring secure and
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stable cross-platform communication.
Engineered a Remote Config service for real-time game balancing, bridging the
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gap between backend logic and Unity client.

12/2023 – 05/2025 GoITeens
Ukraine Unity Mentor / Tutor
Taught C# programming and Unity game development fundamentals to
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teenagers, breaking down complex technical concepts into accessible lessons.
Supervised the full development lifecycle of student projects, guiding them from
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initial concept to finished, playable games.
Assisted students in implementing ambitious mechanics and solving technical
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challenges, resulting in high-quality portfolio projects.
Conducted code reviews and taught best practices in coding and project
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architecture.

06/2021 – 08/2022 Self-Employed
Ukraine Trainee/Junior Unity Developer
Developed multiple mobile game prototypes to master Unity’s core mechanics,
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physics, and UI systems.
Gained hands-on experience with C# scripting, OOP principles, and algorithm
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implementation.
Researched and integrated essential Unity plugins and assets to streamline the
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development process.

2019 – 2021 University Projects / Research
Ukraine Machine Learning Integration: Engineered and trained ML models for data
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analysis, utilizing Cloud computing (AWS/Azure) for model training and
deployment.
Application Development: Designed and built standalone applications, focusing
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on robust architecture and seamless user integration.

Education
09/2021 – 01/2023 Master of Computer Science
Rivne National University of Water Management and Natural Resources
Advanced studies focused on software architecture, system analysis, and research
in modern development methodologies.

09/2017 – 07/2021 Bachelor of Computer Science
Lviv Lviv Polytechnic National University
Acquired a solid foundation in software engineering principles, focusing on
algorithms, data structures, and Object-Oriented Programming.