Founding Engineer

ABOUT THE ROLE Full-stack engineer who understands vibe coding tools and how recent AI frameworks work. You'll build both frontend and backend for our enterprise workflow automation platform. RESPONSIBILITIES - Architect and build both frontend and backend systems powering our vibe coding platform - Define technical strategy: system design, data modeling, service boundaries, and infrastructure choices - Integrate AI models and build reliable natural language to action pipelines - Collaborate directly with customers to translate enterprise needs into product solutions - Evolve infrastructure for reliability, observability, and performance at enterprise scale - Ship fast while building sustainable, maintainable systems REQUIREMENTS Experience - 5+ years building products quickly - TypeScript (backend and frontend), React - Deep understanding of system design, database architecture, and scaling distributed systems - Modern deployment and infrastructure (Vercel, Cloudflare Workers). Infrastructure as code (Terraform). CI/CD pipelines (GitHub Actions) - Experience with AI frameworks (Vercel AI SDK, Mastra) and patterns (agentic loops, tool calling, streaming, MCP) Bonus - Understanding of tools like OpenCode and how they work - Shipped AI/LLM products to production. - LLM observability and production debugging (Langfuse, Datadog). - Experience at early-stage startups - Major contributions to OSS projects Mindset - Founder mentality: hard work, independence, ownership - Ready to work in person in San Francisco ABOUT JINBA We help large enterprises build automated workflows using plain English. Unlike traditional no-code tools that bolt a chat agent onto their interface, Jinba is built as a native vibe coding platform from the ground up. YC W26. International team across SF and Tokyo. Growing fast with major enterprise contracts.