Rakuten is seeking a Senior AI Engineer to help drive adoption of large language models across its businesses. The role typically requires strong experience in machine learning, natural language processing, generative AI, and software engineering, together with practical knowledge of LLM frameworks, model evaluation, prompt engineering, APIs, and cloud platforms. Candidates should be able to design and deploy reliable AI solutions, improve existing systems, work with large datasets, and communicate effectively with product managers and engineers. The successful candidate is expected to lead technical initiatives, identify valuable LLM use cases, promote responsible AI practices, and support teams adopting these technologies in production.
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, advertising, and online services. Rakuten is known for connecting these businesses through its membership and loyalty platform, allowing customers to earn and use Rakuten Points across multiple products. The company has a substantial international presence and employs people from many nationalities, particularly in technology and data-focused roles. Its engineering teams work on large-scale platforms, cloud systems, artificial intelligence, cybersecurity, and mobile networks. Rakuten promotes innovation, collaboration, and the use of technology to improve customer experiences. Working there can provide exposure to complex, high-volume products and opportunities to influence digital transformation across several industries.
Japan offers strong opportunities in software engineering, artificial intelligence, data science, robotics, cloud computing, finance, manufacturing, and tourism. Tokyo has the largest international job market, while Osaka, Nagoya, Fukuoka, and Sapporo also offer growing technology communities. Workplace culture values reliability, teamwork, respect, and attention to detail; English-friendly roles exist, although Japanese ability expands career options. Living costs are highest in Tokyo, but public transport is excellent, cities are safe, and healthcare and everyday services are efficient. Japan has four distinct seasons, varied regional food, and easy access to beaches, mountains, and cultural sites. Most professional foreign workers need an employer-sponsored work visa, commonly the Engineer/Specialist in Humanities/International Services status. Prepare a valid passport, degree or relevant experience, employment contract, residence registration, and health insurance enrollment. Research housing, taxes, commuting, and relocation support before moving.
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