M2IE (Marshmallow Interactive Entertainment Co., Ltd.) Marshmallow Interactive Entertainment Co., Ltd.
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CareersAI Product Engineer　·　Product & Technology

AI Engineer (Full-stack / LLM Applications)

Build Tonakai fast, with AI at the core of how you work

Experienced hireFull-timeIntern · path to full-time
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Responsibilities
  • Plan, design and build Tonakai (web and app)
  • Build features and automation with LLMs and AI agents
  • Rapid development and testing built on AI coding tools
  • Continuous improvement based on real marketing work
Requirements
  • Fluent daily use of generative AI tools (ChatGPT, Claude, Gemini, etc.) (including AI coding tools and LLM APIs)
  • Development experience in web, app or backend
  • The drive to ship products using AI
Salary
  • Annual salary ¥5M–¥9M (based on experience and skills)
Before you apply
  • Ebisu office, Tokyo (on-site)
  • Business-level Japanese or above required. Bilingual Japanese/Chinese, Korean or English welcome
  • Ideally 5+ years of hands-on experience. With less, show your interest and ability to learn through your work
  • Non-Japanese nationals need a status of residence that permits work
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