Design, build, and maintain production-grade ML systems with a focus on Large Language Models (LLMs).
About this role
Noeon Research, a Tokyo-based deep-tech AI startup with an international team of about 30 people, is hiring a Senior Backend Engineer for its Automated Reasoning work. The role contributes to critical components of a distributed reasoning system, taking ownership of specific engineering artifacts such as services and libraries, and helping build a system that understands programming languages. The work centers on backend development, concurrency and threading, and distributed systems.
Requirements include at least 5 years of software engineering experience and hands-on experience in distributed systems, AI, AAA game development, or scalable web technology. Technical skills required are proficiency in Rust, C++, and C, Python, and some TypeScript, plus experience building backends. Knowledge of a modern web UI framework, containerization with Docker, graph data structures and algorithms, and prior startup experience are advantageous. A degree in Software Engineering, Computer Science, Mathematics, or a related technical discipline is required, along with fluent conversational and written business English (C1+).
The position is full-time in Tokyo and requires relocation. The target salary range is 14–17M JPY per year plus equity (options). The company offers a flexible schedule, Japanese social security with additional medical coverage and yearly health checkups, English and Japanese language training, visa sponsorship, relocation allowance, travel allowance, and monthly commute expenses in Japan.
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