AI Engineer

Job Description ■ Responsibilities - Planning, design, and development of products and internal systems utilizing LLM / Generative AI - Application development utilizing LLM APIs such as OpenAI API - System construction utilizing AI Agent / RAG / Function Calling, Tool Use, etc. - Construction of search and generation systems utilizing internal data and knowledge - Automation of internal business operations using AI - AI implementation in customer support, marketing, operations, etc. - Evaluation, accuracy improvement, and prompt design of LLM - Technical selection of AI services, models, and frameworks - API integration between AI functions and existing products and internal systems - Rapid development of PoC and production based on effectiveness verification - Design considering security, privacy, cost, and quality in AI utilization - Discussions with the CEO and various business units regarding AI utilization What we particularly expect is that you do not simply accept vague requests such as "I want to do something with AI." You will understand the essence of the problem, judge whether AI should be used, or whether it should be solved with traditional system development or SaaS, and propose the optimal solution. Working Hours 10:00 - 19:00 Job Requirements [Required] All of the following are mandatory: - Practical experience in web application/software development - Experience developing applications or systems utilizing generative AI/LLM - Experience developing with Python, TypeScript, JavaScript, etc. - Experience developing using LLM APIs - Experience integrating with external services and existing systems using APIs - Ability to understand business-side challenges and translate them into technical solutions - Ability to consider quality and operation as a service that will actually be used, not just PoC - English proficiency sufficient to discuss specifications, technology, and priorities with the CEO and overseas members *Japanese language skills are not required. 【Welcome】 Experience in designing and developing systems using RAG Experience in designing and developing AI Agents / Agentic Workflows Experience in LLM Evaluation / Observability Experience in development using Vector Database / Embedding Experience in development using LangChain / LangGraph / LlamaIndex, etc. Experience in development using LLM APIs such as OpenAI / Anthropic / Google Experience in cloud development using AWS / GCP, etc. Experience in development using RDBs such as PostgreSQL Experience in web development using React / Next.js / Node.js / TypeScript Experience in business process automation and operation improvement using AI Experience in launching AI products from PoC to production operation Experience in quality evaluation, cost optimization, and latency improvement of AI functions Experience in developing services that handle sensitive data, such as healthcare. English Level Business Conversation Level (TOEIC 735-860) Japanese Level None Benefits Social Insurance, Commuting/Transportation Allowance, Five-Day Workweek, Summer Holidays, Winter Holidays, Paid Holidays, Congratulatory or Condolence Leave, Child-care Leave Job Contract Period Full-time employment Nearest Station 11-minute walk from Meguro Station, 3-minute walk from Fudomae Station