Treasure AI
Senior AI Engineer
Japan (Hybrid)RemotePosted Today¥10,000,000 – ¥10,000,000
Full TimeSeniorRemoteJP
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Job Description
Senior AI Engineers at Treasure AI lead the development of sophisticated AI features — owning LLM integrations, agentic workflows, and AI product experiences from design through production. You own th
Key Highlights
- Lead the design and implementation of AI-powered features: LLM integrations, retrieval-augmented generation, agentic pipelines, and AI-augmented workflows
- Own prompt engineering rigor — structure prompts systematically, evaluate outputs, iterate based on production signal, and document what works
- Develop LLM integration patterns for the pod: streaming responses, function calling, context window management, fallback handling, and evaluation
- Understand the AI solution space well enough to recommend the right approach — knowing when to reach for prompting, RAG, fine-tuning, or agentic patterns, and when to bring in additional expertise
- Contribute production-grade code in Ruby/Rails and TypeScript/React; hold a high bar for code quality in AI and non-AI features alike
Qualifications
Required Qualifications
- 4–7 years of software engineering experience with significant focus on AI/ML features or LLM-powered product development
- Strong proficiency in prompt engineering, LLM API integration, and building AI features that perform reliably in production
- Experience with RAG, agentic workflows, or function-calling/tool-use patterns with language models
- Experience making AI solution tradeoffs in production — choosing between prompting, RAG, fine-tuning, and agentic approaches based on real constraints
- Solid full-stack skills in Ruby/Rails and TypeScript/React
- Fluency with Claude Code, GitHub Copilot, and our customer-facing agent platform
- Experience evaluating LLM outputs systematically — evals, test cases, production monitoring
- Operational awareness of AI systems in production: latency management, cost at scale, multi-tenant routing, and customer data boundaries
- Track record of meaningful code reviews that grow teammates’ technical capabilities
Skills & Technologies
RubyRailsTypeScriptReact
About the Company
Treasure AI
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Job Details
Employment Type
Full Time
Experience Level
Senior
Salary Range
¥10,000,000 – ¥10,000,000
Location
Japan (Hybrid)
Work Mode
Remote
Posted
Today
Country
JP