AI Engineer - LLM Adoption Department (LLMAD)

Role summary

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Rakuten is seeking an AI Engineer for its LLM Adoption Department to help introduce large language models across the group. The role typically involves developing and integrating LLM-based applications, evaluating models, building reliable AI workflows, and supporting business teams with practical adoption. Candidates should have professional software engineering experience, strong Python skills, knowledge of machine learning or natural language processing, and familiarity with APIs, cloud platforms, or generative AI tools. Experience with prompt engineering, retrieval-augmented generation, model evaluation, and production deployment is highly valued. The successful candidate is expected to communicate well with international teams, translate business needs into scalable solutions, and stay current with rapidly changing AI technologies.

About the employer

Rakuten Group, Inc. is a major Japanese technology and internet company headquartered in Tokyo. Founded in 1997, it operates a broad ecosystem covering e-commerce, fintech, mobile communications, digital content, travel, online advertising, and professional sports. Its services are connected through the Rakuten membership and loyalty platform, serving customers in Japan and international markets. Rakuten is known for its large-scale technology operations, strong focus on data and digital innovation, and multilingual corporate environment. The company has been investing heavily in artificial intelligence, cloud technologies, mobile networks, and automation. Employees may work with teams across Japan and overseas, making collaboration and communication important. The culture can be fast-paced and entrepreneurial, with opportunities to contribute to products used by millions of customers.