Senior Game Developer

Japan·TokyoFull-timesenior

Software EngineeringGame Developer

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Quick Summary

Key Responsibilities

What you’ll do Design, implement, and maintain robust Unity/C# gameplay, UI, and client systems for a live mobile game. Build modular, data-driven features that respond safely to live configuration,

Requirements Summary

Who you are and what you’ve done 7+ years professional game development experience, including 4+ years with Unity and C#. Shipped multiple games, including at least one Unity title.

Technical Tools

Software EngineeringGame Developer

Senior Game Developer

Locations: Tokyo

About us:

Deep expertise. Personal and Industry evolution. Impeccable craft. These are Limit Break’s founding principles.

Limit Break is founded by global industry leaders in mobile gaming. We are unlocking its potential beyond games to transform digital markets into real-world economies and digital worlds into vibrant communities who will take gaming economies for both players and traders to new limits. We combine the power of technology, and creative vision to create experiences that connect people from all corners of the globe.

Limit Break is backed by leading investors that include Buckley Ventures & Paradigm Ventures. The adoption rate and a number of public and private partnerships is proving it to be the next wave of technology of the future and Gaming is leading the way.

About the Role:

Limit Break is looking for an exceptional Game Developer to help build ambitious, high-quality mobile games with a team that moves fast and thinks deeply about the player experience.

As a strong individual contributor, you will own meaningful gameplay and technical systems, work through complex engineering challenges, and collaborate closely with talented developers, artists, designers, and product leaders.

This role is for someone who wants to grow through responsibility, challenge, and impact. At Limit Break, you’ll work on problems that demand sharp judgment, technical depth, and a high standard of execution.

Join a team where strong engineers are trusted, challenged, and given room to do the best work of their careers.

Responsibilities: What you’ll do

Design, implement, and maintain robust Unity/C# gameplay, UI, and client systems for a live mobile game.
Build modular, data-driven features that respond safely to live configuration, remote content, and backend-driven state.
Own features from design through implementation, polish, release, telemetry, debugging, and post-launch iteration.
Collaborate closely with design, art, backend, QA, and production to turn ambiguous feature goals into reliable player-facing experiences.
Partner with backend engineers on API contracts, client-server flows, error handling, version compatibility, and production diagnostics.
Improve client architecture, performance, tooling, and engineering quality through thoughtful code reviews and maintainable system design.
Diagnose and fix production issues across devices, builds, content, networking, and Unity lifecycle edge cases.

Qualifications: Who you are and what you’ve done

7+ years professional game development experience, including 4+ years with Unity and C#.
Shipped multiple games, including at least one Unity title.
Deep understanding of Unity lifecycle, MonoBehaviours, ScriptableObjects, Prefabs, Addressables, serialization, and asset/content loading.
Strong C# engineering fundamentals, including async programming, cancellation/cleanup patterns, memory/performance awareness, and maintainable architecture.
Experience building data-driven or live-service systems that support remote config, content updates, events, or backend-driven behavior.
Comfortable owning complex features end to end, from ambiguous requirements to polished production behavior.
Strong debugging instincts for mobile client issues, including logs, crashes, performance, networking, and device-specific behavior. Able to work autonomously while communicating clearly with engineers, designers, artists, QA, and production.
Has built or shipped at least one game in a small-team environment, taking ownership across multiple major facets of development.
Proficiency in English.

Nice to have. What an ideal candidate looks like

Bilingual preferred in English and Japanese.
Experience with Free-to-play titles.
Familiarity with CI/CD pipelines.

Apply now:

If you are confident, driven and are looking for an exciting role, this job could be a great opportunity for you.

Apply to careers@limitbreak.com to explore this new opportunity.

This is an international blockchain gaming company that operates regionally, and is opening offices in multiple locations around the globe.

We value diversity at our company. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or any other applicable legally protected characteristics in the location in which the candidate is applying.