Design and operate shared identity, authentication and authorization services using Ruby or Kotlin, leading integrations and migrations across Money Forward products in an English-working team.
About this role
The AI Product Builder develops new products and features across Money Forward’s HR software. This is a full-cycle engineering role using generative AI to shorten discovery, prototyping and delivery while connecting technical decisions with customer needs.
Work covers LLM experiments, requirements, architecture, implementation, testing, deployment and operations. Engineers collaborate with product managers and HR-domain specialists, considering security, data governance and infrastructure as well as rapid AI-assisted development.
Applicants need at least five years of web-application development, experience taking products from planning to release, hands-on generative-AI prototyping and machine-learning fundamentals. Business-level Japanese and English reading for technical documents and LLM papers are required; English speaking is not required. High English proficiency is not expected on entry, but applicants must be willing to improve and aim for TOEIC 700 within one year.
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