Senior Fullstack Engineer AI, RAG Automation

Top 3 Reasons To Join Us Premium Healthcare package insurance 13th month salary, Performance bonus 16 days annual leave The Job

• Architect, deploy, and maintain end-to-end AI applications, leveraging either RAG architectures or complex multi-agent automation workflows.
• Build high-performance, secure backend services (e.g., Python/FastAPI, Node.js) and clean, intuitive frontends (e.g., React, Next.js).
• Actively research, benchmark, and prototype new AI models, developer tools, and automation frameworks to keep our product suite ahead of the curve.
• Work closely with product stakeholders and engineering teams to ensure that deliverables meet the rigorous quality standards typical of Japanese clients and businesses.
• Seamlessly integrate third-party APIs, vector databases, LLM orchestration platforms, and workflow automation engines.

Your Skills and Experience

• At least 4 years of professional experience in Fullstack software development.
• At least 1 year in one of the following:
  • RAG (Retrieval-Augmented Generation): Experience building live RAG pipelines utilizing vector databases (e.g., Pgvector, Pinecone, Qdrant) and orchestration frameworks (e.g., n8n, LangChain, LlamaIndex).
  • AI Automation Workflows: Experience designing and deploying autonomous AI agents, multi-agent workflows, or complex LLM-driven automation (using tools like n8n, Langflow, Flowise, or custom crew/agent frameworks).
• Proven experience working within a Japanese company or delivering projects for Japanese clients. You are comfortable with the detail-oriented, systematic, and high-quality expectations of the Japanese business ecosystem.

You love tracking AI developments, reading research papers, and tinkering with new open-source tools. You are excited to recommend and build proof-of-concepts (POCs) for fresh product ideas.

Why You'll Love Working Here

-      Competitive salary and benefits including Premium Healthcare package insurance

-      13th month salary, Performance bonus

-      16 days annual leave

-      Comprehensive Training Courses (Languages, Technical and Soft-skill)

-      Language Certificate allowance (TOIEC and Japanese)

-      Lunar New Year gifts

-      Lunch and bus/ parking allowance

-      Fun team activities and outings

-      Sponsored happy hour and sport clubs

-      Comfortable work space and friendly colleagues