Production AI SaaS platform: a Claude-powered agent engine in Rails plus the full React/TypeScript frontend, built end to end in 2 months.
The problem
The product needed an agent that could chain dozens of tools without falling over, stream its responses in real time, and connect to a user's third-party accounts, all without LLM costs eating the margin.
What I built
Built a Claude-powered agent with 65 custom tools, multi-step tool orchestration, and real-time SSE streaming, plus a multi-platform activation pipeline whose 10 OAuth integrations connect a user's third-party accounts on their own.
Results
Cut LLM API costs about 90% with prompt caching, context compaction, and multi-model routing: Sonnet for the agent loop, Haiku for the light work.
