Internship - Software Engineer

About this role

Why Manufact? At Manufact, we’re building the infrastructure layer for the next generation of software: AI agents. Our platform helps developers build, test, and deploy MCP servers and AI-powered applications that integrate directly with tools like ChatGPT and Claude. We’re creating the foundation for a world where software is consumed not just by humans, but by autonomous agents. In a short time, our open-source SDKs have reached millions of downloads and are used by thousands of developers and companies worldwide. You’ll be joining a very small, fast-moving team with roots in Zurich and San Francisco. This is an opportunity to work directly with the founders and contribute to a product used at scale by cutting-edge AI teams. Joining Manufact at this stage means high ownership, fast learning, and real impact from day one. Your Role At Manufact, you won’t just “do tasks”. You’ll help build core infrastructure for AI agents. This is a hands-on engineering internship where you will primarily work on backend systems, while also contributing to DevOps and parts of the frontend as needed. You’ll ship real features used by developers building AI products, and see your work in production quickly. What You Will Do Build core backend systems Develop and improve backend services using TypeScript Work on APIs, SDKs, and infrastructure powering MCP servers and apps Help design systems that are scalable, reliable, and developer-friendly Contribute to DevOps and infrastructure Assist in deploying and maintaining cloud infrastructure Improve developer workflows, CI/CD pipelines, and testing systems Help ensure reliability and performance of the platform Work on testing and developer tooling Use Playwright to build end-to-end tests and improve product reliability Contribute to tools that developers use to build and debug MCP apps Touch frontend when needed Support simple frontend features or internal tools Help improve developer experience across the product Ship fast and iterate Work closely with the founders to prioritize and deliver features Take ownership of projects from idea to production Iterate quickly based on real user feedback What Success Looks Like You’ve shipped features that are actively used by developers Backend systems you worked on are stable, scalable, and easy to use Testing coverage and reliability have improved through your contributions You’ve taken ownership of projects and delivered them end-to-end You’ve learned how to operate in a fast-paced startup environment Who You Are You are studying Computer Science or a related field (or equivalent experience) You have solid programming skills, ideally in TypeScript or similar languages You are comfortable working on backend systems You are curious about DevOps, infrastructure, and distributed systems You enjoy building and shipping real products, not just prototypes You take ownership and like moving fast Bonus: Experience with Playwright or automated testing Exposure to cloud platforms (AWS, GCP, etc.) Interest in AI, LLMs, or developer tools Why Join Manufact Work directly with founders and shape a YC startup from the inside Build infrastructure for AI agents used by thousands of developers Gain hands-on experience across backend, DevOps, and product engineering High ownership and steep learning curve Flexible start date (the sooner, the better)