Develop tools for consumer game production, including launchers, data-entry utilities, Unreal Engine editor extensions, converters and checkers, while supporting middleware and OSS adoption.
About this role
The role develops applications and libraries supporting Cygames game titles and other content. Responsibilities include developing consumer-facing applications, in-house SDKs and libraries used in game development, and internal tools. The engineer also investigates and improves issues such as memory shortages and performance problems, updates libraries and SDKs, migrates to modern technologies, and maintains the development environment.
The required experience is at least three years of team-based application development using Kotlin, Java, or similar technologies. Candidates must be able to implement user interfaces using Jetpack Compose or Android View while applying Android operating-system characteristics. The role requires the ability to implement server data communication while accounting for normal and error behavior, and to understand Android SDK and standard open-source libraries such as Android Jetpack in order to select and implement them appropriately.
The development environment mainly uses Kotlin, including Java, with Git and GitHub for version control and GitHub Actions for CI/CD. Named tools and libraries include Android Studio, Gradle with Kotlin DSL or Groovy, Firebase, and Jetpack Compose. Development may also use cross-platform frameworks such as Kotlin Multiplatform, Compose Multiplatform, and Unity.
Additional experience welcomed by the posting includes ongoing feature additions and operational development for events or campaigns, releasing Android applications to app stores, developing or operating B2C applications or web services including social games, developing applications for other platforms such as iOS, using cross-platform frameworks, understanding mobile application architectures such as MVVM and Clean Architecture, and using generative AI tools such as GitHub Copilot or ChatGPT.
The role works with game and entertainment content. The posting describes support programs including training, study and skills-upgrade initiatives, influenza vaccination, an in-house osteopathic service, free soft drinks, lunch support, company clubs, social gatherings, and a game playroom. The work locations are in Shibuya and Meguro, Tokyo. Employment is contract-based, and working location, workload, and compensation are discussed during interviews.
This is an AI-generated summary of the employer's original posting — details can be incomplete, out of date or simply wrong. Always confirm everything on the official posting before applying.
Similar jobs
Develop runtime systems and tools for real-time physics simulation in a console game engine, applying C/C++, mechanics, collision detection, linear algebra, and low-level optimization.
Design and develop real-time graphics systems for game consoles, using low-level graphics APIs and shader development to build game-engine rendering capabilities.
Supports quality assurance for amptalk’s core products by testing new features, retesting existing functionality after changes, and identifying defects before releases reach customers.
Develop client-side systems for console game titles using an in-house engine, Unity, or Unreal Engine, including gameplay flow, player and enemy behavior, UI, and physics-based effects.
Lead technical evaluation, architecture design, production-readiness decisions, and standardization across multiple generative AI development teams. Support LLM, RAG, agent, evaluation, and guardrail selections while guiding secure, available, auditable, and cost-conscious production architectures.