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About the Role

We are seeking a Game Programmer to support technical implementation across game projects of varying scope, from small-scale productions up through AAA titles. This individual contributor role focuses on hands-on development of gameplay systems, prototyping, and tooling within a prototype-driven environment. You will implement game mechanics, contribute to reusable libraries, and grow your expertise across multiple engines, primarily Unreal Engine C++.

Responsibilities

Implement gameplay systems and mechanics under the guidance of senior engineers, translating design concepts into functional code.
Build iterative prototypes to test new gameplay ideas and support project pitches, focusing on proof of concept, playability, and feel.
Contribute to existing reusable technical libraries and frameworks (networking, simulation, core utilities) following established patterns.
Design modular, decoupled systems — such as ECS architectures — that scale cleanly across projects.
Work primarily in Unreal Engine C++, while adapting to and supporting other platforms or engines as project requirements evolve.
Create and optimize internal tools and editor extensions that empower designers and artists to work more independently and efficiently.
Assist with the automation of technical workflows and CI/CD pipelines to improve build stability and deployment speed.
Identify and resolve performance bottlenecks, ensuring smooth gameplay and stability across different hardware targets.
Work as a technical partner to designers and producers, providing feedback on technical feasibility and proposing practical solutions to creative challenges.
Collaborate with distributed teams across different regions, ensuring technical alignment and consistent implementation of features.
Share progress openly, flag blockers early, and actively participate in technical discussions to help the team find the best path forward.
Proactively maintain clear technical notes and documentation for the systems you build to support team scaling and knowledge sharing.
Adopt test-driven development (TDD) and write unit tests for critical gameplay logic, ensuring reliability and confidence in refactoring.
Proactively experiment with new patterns and industry trends to bring innovative technical solutions to the team.
Participate in code reviews, receiving guidance from senior engineers to improve your craft while providing constructive feedback to teammates.
Actively seek feedback, ask questions, and engage with the team's knowledge base to accelerate your growth as a game programmer.

Requirements

Applicants must be currently residing in Japan and possess valid authorization to work in Japan.
Strong Programming Foundation: Show good proficiency in C++ and a solid understanding of computer science fundamentals (data structures, algorithms, and memory management).
Version Control Proficiency: Comfortable working with Git or similar version control systems in collaborative environments.
Demonstrated Interest in Game Development: A portfolio of personal projects, prototypes, or contributions to existing games or mods that demonstrate your ability to turn an idea into a functional system.
Problem-Solving Mindset: Ability to break down complex technical challenges into manageable tasks and find practical, maintainable solutions.
Collaborative Spirit: Experience working with others (whether in a professional team, a game jam, or an open-source project) to achieve a shared goal.
Familiarity with Unreal Engine (C++), though a strong foundation in other engines or languages is welcome.
Interest or experience with modern architecture patterns, such as ECS, data-oriented design, or modular system architecture.
Showing an understanding of what makes a game mechanic, or system engaging, intuitive, and fun is a definite plus.
Experience building custom tools, editor extensions, or automation scripts to improve development workflows.
Experience working in multicultural environments or an interest in the Japanese game development industry; Japanese language proficiency is a plus but not required.

Skills

Technical Curiosity
Prototyping Mindset
Engineering Discipline
Debugging & Profiling
Versatility
Collaborative Communication
Adaptability

Location

Japan

Work Type

Full-time
Contract
Hybrid
Remote

Benefits

Competitive compensation package with performance-based incentives.

About the Company

Keywords Studios is a global provider of creative and technical services to the video games industry, with over 13,000 professionals across 70+ studios in 25+ countries.
We support clients across the entire game lifecycle through three core Service Lines: Create — Game development, art production, and audio; Globalize — Localization, localization QA, functional testing; Engage — Marketing, LiveOps, community, and player support.
In Japan, Keywords Studios delivers its full range of services across Create, Globalize, and Engage, supporting leading publishers and developers through both local and international production teams.
Our presence includes the Tokyo-based development studio Wizcorp, alongside established localization, QA, player support, and marketing capabilities serving some of the most influential companies in the Japanese games and entertainment industry.
Keywords Studios is increasingly trusted by Japanese partners to support productions that span multiple regions—combining Japanese creative leadership with global delivery capacity across Asia-Pacific and beyond.
As one of the world’s most influential and production-intensive markets, Japan represents a strategic growth area for Keywords Studios.
This role plays a key part in strengthening client partnerships, driving business opportunities, and ensuring high-quality delivery across projects.
A collaborative, growth-oriented global culture.

Equal Opportunity

Keywords Studios is strongly committed to protecting your personal information. By sending your CV/Resume, you are agreeing to our terms and conditions and consent to your data being managed and retained in accordance with our data privacy and retention policy https://www.keywordsstudios.com/en/applicant-privacy-notice/.