Tool Engineer, Game Engine

This role develops and maintains editors and tools used for game development. The work focuses on the Cyllista Game Engine, including level editors and other tools for creators and engine developers. The role also includes developing and maintaining game-runtime modules that integrate with the editor.

The stated responsibilities include developing editors with Qt for Python, developing and maintaining game-development tools in Python, and developing and maintaining C++ modules for the game runtime that work with the editor.

The development environment names Python, C++ and Lua as programming languages, Qt and Qt for Python (PySide) as GUI APIs, and Windows as the platform.

Required qualifications are professional experience using C or C++, experience developing tools on Windows, and experience using GUI frameworks such as Qt or WPF. Experience developing asset-management systems, designing or implementing formats for game data such as level data, and professional Python experience are listed as preferred qualifications.

The role is expected to develop tools from the perspective of game designers and artists, regularly hear and prioritize their requests, understand their workflows, and propose improvements.

The position is listed as full-time employment. Working hours are 10:00–19:00, with eight scheduled working hours and a 60-minute break from 13:00–14:00. Average monthly overtime is stated as approximately 18.5 hours based on 2025 results. The work locations are offices in Shibuya and Meguro, Tokyo. Annual salary is determined according to experience and ability, with the stated annual range of ¥4.5 million to ¥12 million. A semiannual performance incentive is also available outside the annual salary. The posting lists weekends, public holidays, seasonal and year-end holidays, annual paid leave, social insurance, and benefits and support programs for regular employees. Side jobs are prohibited.