[Breakthrough AI tech] Research Engineer (AI Systems & Model Optimization) – fast growing AI startup – Up to ¥20M +Location: Japan (Hybrid)

Our client is an innovative AI company developing proprietary machine learning technologies and advanced AI products for a global market. With strong financial backing and a world-class team of researchers and engineers, they are focused on pushing the boundaries of AI through novel architectures, large-scale experimentation, and cutting-edge research.

As a Senior Research Engineer, you will bridge research and production by transforming advanced AI concepts into scalable, high-performance systems. Working closely with research scientists, you will design and optimize training pipelines, build robust infrastructure for large-scale experimentation, and improve the efficiency of model training and deployment.

Key Responsibilities

• Collaborate with AI researchers to implement and scale advanced machine learning models
• Design and optimize distributed training and inference systems
• Develop tooling and infrastructure for large-scale data processing and model experimentation
• Improve model performance, reliability, and computational efficiency
• Contribute to the evaluation and implementation of novel AI algorithms and architectures
• Support the deployment of research outcomes into production-ready systems

Requirements

• Experience building, training, or operating large-scale AI/ML systems
• Hands-on experience with modern AI technologies such as LLMs, multimodal models, conversational AI, or other advanced machine learning systems
• Strong software engineering skills, particularly in Python and PyTorchExperience with distributed computing and large-scale training environments (e.g., Deep
• Speed, FSDP, Ray, Kubernetes, etc.)
• Interest in applying cutting-edge AI research to real-world products
• Business-level Japanese proficiency
• Benefits
• Competitive compensation package with equity participation
• Flexible hybrid work environment
• Professional development budget for conferences, courses, certifications, and learning resources
• Comprehensive leave and family support programs
• Opportunity to work alongside leading AI researchers on next-generation technologies