Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a passionate Game Developer with over 4 years of experience specializing in Unity Engine. I've had the opportunity to work on games with more than 14 million downloads, focusing on performance optimization, backend integration, and creating user-friendly interfaces. I enjoy solving complex problems and collaborating closely with design and backend teams to bring engaging gameplay experiences to life. Currently, I work as a Senior Unity Developer, where I've led the design and implementation of core gameplay systems and tools to enhance developer productivity. I am always eager to learn new technologies and techniques to improve and create better games.…I am a passionate Game Developer with over 4 years of experience specializing in Unity Engine. I've had the opportunity to work on games with more than 14 million downloads, focusing on performance optimization, backend integration, and creating user-friendly interfaces. I enjoy solving complex problems and collaborating closely with design and backend teams to bring engaging gameplay experiences to life. Currently, I work as a Senior Unity Developer, where I've led the design and implementation of core gameplay systems and tools to enhance developer productivity. I am always eager to learn new technologies and techniques to improve and create better games.

Juan Sebastian Colina

Game Developer, Game Designer, Developer, +1





I am a passionate Game Developer with over 4 years of experience specializing in Unity Engine. I've had the opportunity to work on games with more than 14 million downloads, focusing on performance optimization, backend integration, and creating user-friendly interfaces. I enjoy solving complex problems and collaborating closely with design and backend teams to bring engaging gameplay experiences to life. Currently, I work as a Senior Unity Developer, where I've led the design and implementation of core gameplay systems and tools to enhance developer productivity. I am always eager to learn new technologies and techniques to improve and create better games.…I am a passionate Game Developer with over 4 years of experience specializing in Unity Engine. I've had the opportunity to work on games with more than 14 million downloads, focusing on performance optimization, backend integration, and creating user-friendly interfaces. I enjoy solving complex problems and collaborating closely with design and backend teams to bring engaging gameplay experiences to life. Currently, I work as a Senior Unity Developer, where I've led the design and implementation of core gameplay systems and tools to enhance developer productivity. I am always eager to learn new technologies and techniques to improve and create better games.

Available to hire

I am a passionate Game Developer with over 4 years of experience specializing in Unity Engine. I’ve had the opportunity to work on games with more than 14 million downloads, focusing on performance optimization, backend integration, and creating user-friendly interfaces. I enjoy solving complex problems and collaborating closely with design and backend teams to bring engaging gameplay experiences to life.

Currently, I work as a Senior Unity Developer, where I’ve led the design and implementation of core gameplay systems and tools to enhance developer productivity. I am always eager to learn new technologies and techniques to improve and create better games.

Skills

Unity 3D

.NET

GitHub

Experience Level

Expert

Unity 3D

Expert

.NET

Intermediate

GitHub

Intermediate

Work Experience

Senior Unity Developer at Roshka Studios

January 1, 2021 - Present

Designed and implemented core gameplay systems in Unity 3D, including movement, NPC behavior, combat mechanics, turn-based systems, and dynamic enemy waves. Led refactor of key combat systems ensuring scalability and clean logic separation. Developed custom tools to assist designers, enhancing iteration speed and reducing errors. Built a dynamic arrow projectile system using object pooling and DoTween. Created modular enemy architectures and turn manager systems to optimize maintenance. Integrated UI systems for battle dialogues and status indicators using Unity UI Toolkit. Optimized memory and frame rate using pooling, custom culling, and profiling tools. Led monetization integration with rewarded ads, interstitials, and IAPs. Maintained and evolved a live mobile game with over 20 million downloads, collaborating with backend and design teams to improve retention and reduce bugs.

Backend .NET at Roshka

June 30, 2023 - July 19, 2025

Maintained and supported a critical bank payment API used by multiple financial clients. Successfully upgraded the system from .NET Framework 4 to .NET 6, improving performance, maintainability, and security compliance.