Senior Machine Learning Engineer - Large Language Models

About the Role

We are seeking a Senior Machine Learning Engineer - Large Language Models to join our innovative team at Noeon Research. This position offers the opportunity to work on cutting-edge projects in the field of AI, specifically focusing on Large Language Models (LLMs). As a Senior Machine Learning Engineer, you will play a crucial role in designing and maintaining production-grade ML systems.

What You'll Do

• Design, build, and maintain production-grade ML systems with a strong focus on Large Language Models (LLMs).
• Own and evolve the LLMOps lifecycle: data preparation, fine-tuning, evaluation, deployment, monitoring, and iteration.
• Develop evaluation frameworks for LLM quality, robustness, and regression tracking.
• Collaborate closely with researchers, product engineers, mathematicians, and infrastructure teams to translate research prototypes into reliable production systems.
• Contribute to architectural decisions around agentic systems, RAG pipelines, and hybrid ML + symbolic components.

Requirements

• 3+ years of experience in Machine Learning or Applied AI roles.
• Hands-on experience deploying ML models to production environments.
• Practical experience with LLMs (open-source or proprietary) in real-world applications.
• Experience operating ML systems under production constraints (latency, cost, observability, reliability).
• Experience working in fast-moving startup or R&D-driven environments is a strong plus.

Nice to Have

• Strong Python proficiency; experience with ML frameworks.
• Solid understanding of modern LLM stacks: fine-tuning, inference optimization, RAG, prompt/agent orchestration.
• Experience with MLOps / LLMOps tooling: experiment tracking, evaluation pipelines, monitoring, CI/CD for models.
• Familiarity with containerization and deployment (Docker, Kubernetes or equivalents).
• Experience with cloud or on-prem GPU environments.
• Understanding of distributed systems concepts is a plus.

What We Offer

• Target salary range of 16-22M JPY per year plus equity compensation.
• Flexible schedule allowing you to work independently outside scheduled team meetings.
• High autonomy in your work, promoting a collaborative environment.
• Low bureaucracy, focusing on performance and results rather than strict processes.
• Medical allowance covering additional medical costs and yearly health checkups.
• Support for Japanese language training.
• Visa sponsorship and relocation allowance.
• Travel and commuting allowances, along with Japanese social security benefits.
• Maternity and childcare leave, and life support services.