Founding Engineer

San Francisco, US
Full-time
Visa Sponsorship

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

Automate enterprise workflows through chat

Other roles at Jinba

Interested?

Let me introduce you to the founders.

Skip the process

Job details

Salary

$150,000 - $250,000

Location

San Francisco, US

Experience

3+ years

Company

NameJinba
IndustryB2B
Team Size2

Funding

Total raised

$500K

Last stage

Seed

Investors

Y Combinator

Founders

Takuya Norisugi

Takuya Norisugi

Co-Founder & COO

LinkedIn
Shoya Matsumori

Shoya Matsumori

Co-Founder & CEO

LinkedIn

What happens next.

No applications, no recruiter spam. Just the intro.

01

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

02

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

03

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.