Founding Engineer

The role

You will build both frontend and backend for an enterprise workflow automation platform. You will architect systems, integrate AI models, and collaborate with customers to translate needs into product solutions.

What you will do

• 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

Required qualifications

• 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)
• Founder mentality: hard work, independence, ownership
• Ready to work in person in San Francisco

Nice to have

• 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

About the company

Jinba helps large enterprises build automated workflows using plain English. It is a YC W26 company with an international team across SF and Tokyo.