> Markdown version of [/jobs/ext/4613242-founding-engineer](https://www.wearedevelopers.com/jobs/ext/4613242-founding-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Founding Engineer - **Company:** Techtree Partners LLC - **Location:** San Francisco, CA, United States - **Experience:** Experienced - **Contract:** Internship / Graduate position - **Skills:** Artificial Intelligence, Software Engineering, Agentic-AI - **Published:** November 7, 2026 - **Apply:** https://www.juju.com/job/28_25197_28ee80360b2c5782296580ad6ab6a121 ## About the Role 2 to 8 years of hands-on software engineering, with production systems you built yourself Zero-to-one experience: founder, technical co-founder, CTO, or a founding or very early engineer at a high-growth startup An unusually fast learner, with something distinctive on your profile (a company you built, a hard technical project, olympiad or competition results, a top internship) You use AI agents heavily in your own work and have opinions about the tooling and harnesses you build You want to build intensely: this is a 6-day, in-person team in San Francisco Nice to have: early engineering at a top AI-native or YC startup; strong internships (quant firms, AI labs, top tech); a strong CS or engineering degree ## Description A pre-seed startup in San Francisco is building the operating system for AI-native service companies: a workforce of AI agents that runs a service business's day-to-day operations end to end. The founder is a second-time founder with a prior exit who has just relocated to SF, and the company recently closed its angel round with leading operator-angels from Europe and the US., You will be one of the first three engineers, and the first ones hired. This is a CTO-calibre seat: you set the technical direction, write most of the early code, and decide what "production-ready" means for agents that run real businesses.