Description

Freelance backend engineer specializing in scalable game services, cloud-native architectures, and data-driven platforms. I build reliable APIs, high-performance servers, and developer-friendly systems using ASP.NET Core, Python, PostgreSQL, containers, and modern cloud stacks.

Industry field of expertise

Languages

Korean
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Berlin (up to 50km)

CosmoUniverse
Senior Software Engineer Technical Lead
November 2025 - March 2026 (4 months)
Backend engineer building scalable game services for mobile action RPGs.
Developing a backend platform that enhances PlayFab workflows for studios.
Designing APIs, data pipelines, and internal developer tools.
Focused on reliability, scalability, and clean architecture.
Tech stack: ASP.NET Core, React, containerized microservices, cloud-native architectures, PostgreSQL, and distributed messaging systems.
Stealth
Startup Software Programmer
December 2024 - July 2025 (7 months)
Implemented AI-driven game engine.
Built automated pipelines for game data processing.
Managed the game server on GCP.

Tech stack: Python, AI coding tool(cursor, claude code)
Python AI Agent Google cloud
Stratosphere Games GmbH
Technical Director
VIDEO GAMES AND ANIMATION
February 2020 - August 2024 (4 years and 6 months)
Berlin/Brandenburg Metropolitan Region, Germany
• Led technical direction and system architecture for live, multiplayer mobile game projects.
• Oversaw backend and client-side engineering for titles including Homeworld Mobile and Dawn of Ages.
• Designed and operated scalable server infrastructure leveraging PlayFab, Azure Functions, ASP.NET Core, Photon/Quantum, Cosmos DB, and SignalR.
• Collaborated closely with gameplay and design teams to integrate Unity clients with robust, low-latency networking solutions.
• Ensured high availability and strong runtime performance through cloud-native architectures and modern CI/CD workflows.
• Managed and mentored engineering teams, establishing best practices in coding standards, testing, and deployment processes.
Microsoft Azure ASP.NET Core Jenkins Unity 3D PostgreSQL

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Bachelor of Arts (B.A.)
Soongsil University
2004
Bachelor of Arts (B.A.)

Max Choi

Senior Backend Engineer Technical Lead

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