Founding Engineer
Techtree
Operating System For AI-Native Service Businesses
Location: San Francisco
Employment Type: Full-time
Location Type: On-site
Level: Mid-Senior Level
About The Company
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.
The Role
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.
There are three flavours of this role, and strong candidates often span more than one:
- Product-minded engineer: takes a vague customer problem to a shipped, polished product in days
- Agent / LLM engineer: builds agent harnesses, tool use, evals and orchestration that hold up in production
- Full-stack / infra engineer: builds the platform, data layer and reliability that let agents run at scale
What You'll Do
- Build the core agent platform from zero with the founder
- Ship end-to-end product for the first design partners, fast
- Own architecture, tooling and engineering culture as the team grows
- Talk to customers directly and turn what you learn into product
What You Bring
- 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
Working Here
- In person in San Francisco, 6 days a week, alongside the founder
- Relocation supported; O-1 visa route for exceptional international candidates (a start in Vienna before moving to SF is possible)
- Competitive SF base plus meaningful founding equity; co-founder-level equity for exceptional candidates
- Process: intro call with the founder, deep-dive, technical interview, close
Apply now
Vacancy posted 2 days ago
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