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Software Engineer (Founding Team)

mcp-use (YC S25)

mcp-use (YC S25)

Software Engineering
San Francisco, CA, USA · Zürich, Switzerland
USD 100k-150k / year + Equity
Posted on Feb 3, 2026

Manufact (formerly mcp-use)

Open source SDK & cloud infrastructure for MCP Servers & ChatGPT Apps

Software Engineer (Founding Team)

$100K - $150K0.50% - 1.00%Zürich, ZH, CH / Zürich, Zurich, CH / San Francisco, CA, US
Job type
Full-time
Role
Engineering, Full stack
Experience
Any (new grads ok)
Visa
US citizenship/visa not required
Skills
Python, TypeScript
Connect directly with founders of the best YC-funded startups.
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Luigi Pederzani
Founder
Luigi Pederzani
Founder

About the role

TL;DR

mcp-use is building open-source dev tools and infrastructure for MCP to help dev teams quickly build and deploy custom AI agents with MCP servers.
Think of Vercel, but oss and vertical on MCP (Model Context Protocol).
mcp-use SDK is one of the most popular MCP libraries with 8,000+ stars on GitHub and 3,000,000+ downloads.
Used by 20% of US 500 like NASA, SAP, NVIDIA and more than 5,000 companies.

What you will own

  • Build the best dev tools for MCP development.
  • Develop the best platform to build and deploy MCP servers and agents.
  • Improve and expand the features of the mcp-use SDKs.

What we’re looking for

We want people with high agency, smart, and passionate about how LLMs interact with external systems via MCP.

The role requires being in-person at our office in Zurich + traveling with us when we go to SF. We do not offer remote work options.

What you are getting

  • You're setting the foundation.
  • Direct impact on 200,000+ developers building with mcp-use.
  • Work directly with founders and shape the company's technical strategy.
  • Good compensation + equity in a rocket ship.
  • Hacker house in the best part of Zurich + long periods in SF.

About the interview

Interview Process

  1. Tell us about things you've built before. Include URLs if possible.
  2. Intro call
  3. Take-home project / oss contribution
  4. Paid trial

We expect you to have used mcp-use library and skimmed through our docs.

About Manufact (formerly mcp-use)

mcp-use is building open source dev tools and infrastructure for MCP. We help dev teams quickly build and deploy MCP servers for AI agents & MCP Apps for ChatGPT. Our SDKs crossed 4M+ downloads and 9,000 Github stars. Dev teams use us at a variety of companies, including both startups and enterprises such as NASA, NVIDIA, SAP.