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Senior Game Developer

Limit Break Inc.

Job Overview

Location

Tokyo

Job Type

Full-time

Full Job Description

📋 Description

• Design, implement, and maintain robust gameplay systems in Unity using C# for a mid-core, 3D mobile game from concept to live release.
• Collaborate closely with designers and artists to translate creative vision into functional, polished gameplay features.
• Design and implement modular, data-driven systems in Unity that support live configuration and dynamic content updates without code changes.
• Interface directly with the backend engineering team to ensure seamless client-server communication and data synchronization.
• Contribute to high-level architecture decisions for the game’s technical foundation, ensuring scalability from prototype to full production.
• Take full ownership of features from initial concept through polish and launch, ensuring quality, performance, and alignment with design goals.
• Diagnose and resolve critical issues related to performance bottlenecks, memory leaks, crashes, and build size using Unity’s profiling and debugging tools.
• Refactor and extend a large, established Unity codebase with minimal disruption, applying best practices for MonoBehaviours, ScriptableObjects, Prefabs, and Addressables.
• Lead the expansion of the engineering team from pre-production to full production, helping to recruit, mentor, and guide junior developers.
• Work autonomously while maintaining clear, consistent communication with cross-functional teams including engineering, design, and art.
• Participate in shaping the development workflow and technical standards for a new, ambitious gaming project with global ambitions.
• Contribute to the creation of a live service mobile game that integrates with real-world economies and digital communities as part of Limit Break’s strategic vision.
• Apply deep understanding of Unity’s engine lifecycle and mobile platform constraints to optimize for performance, battery life, and network efficiency.
• Ensure all systems are built with maintainability and scalability in mind to support long-term updates, player growth, and live operations.
• Help establish technical best practices and code quality standards for a growing team of engineers in a fast-paced, high-stakes development environment.

🎯 Requirements

• 8+ years of professional experience in game development
• 5+ years of professional experience working in Unity
• Strong Unity and C# skills with deep understanding of the Unity engine lifecycle
• Has shipped one or more live service mobile games using Unity
• Confidently work within and refactor large, established Unity codebases
• Proactive mindset with ownership of features from concept to polish
• Strong understanding of Unity architecture including MonoBehaviours, ScriptableObjects, Prefabs, and Addressables

🏖️ Benefits

• Opportunity to shape the workflow and assemble a top-tier team for an ambitious gaming project
• Work with global industry leaders in mobile gaming at a company backed by Buckley Ventures & Paradigm Ventures
• Be part of a pioneering initiative transforming digital gaming economies into real-world economic systems
• Collaborate in a passionate, experienced team focused on gaming excellence and creative innovation

Skills & Technologies

Redis

Docker

Senior

Onsite

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Limit Break Inc.

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About Limit Break Inc.

Limit Break develops blockchain-based games with embedded Web3 economies, leveraging its ERC-721-C standard and DigiDaigaku NFT collections to deliver free-to-play mobile titles that reward active participation and enable player ownership of digital assets.

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