You will build the simulation and evaluation infrastructure that powers the training of frontier AI agents. By developing containerized sandboxes and orchestration systems, you will enable research labs to improve agentic models through rigorous simulation. This role offers the rare chance to work on the infrastructure layer of LLM-based agent self-improvement.
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San Francisco, USA$170k-$350k + Equity
Featured roleSan Francisco, USA$170k-$350k + Equity
Founding Engineer at well-funded AI infrastructure startup
Join a team of elite engineers from Waymo and SpaceX building the simulation platform for AI agent self-improvement. As a Founding Engineer, you'll develop the containerized sandboxes and orchestration systems that frontier AI labs use to train and evaluate their most capable models. This is a rare opportunity to apply the engineering discipline of self-driving cars to the LLM era, owning massive technical domains in a high-trust, seed-stage environment with significant enterprise traction. If you thrive on technical ambiguity and want to build the infrastructure layer for the future of AI agents, this is the role for you.
Overview
Why this role stands out
Company
About the company
well-funded AI infrastructure startup
Responsibilities
What you will do
- Design and scale distributed backend systems, including containerized simulation sandboxes and high-throughput orchestration pipelines.
- Build robust grading and evaluation infrastructure to provide the reward signals necessary for RL-based agent training.
- Collaborate directly with AI researchers to translate complex agentic workflows into reliable, production-grade infrastructure.
Candidate profile
Who this is a fit for
- Proven track record of building complex distributed systems, ML pipelines, or platform infrastructure at high-growth, technically ambitious companies.
- Strong systems thinking and fundamentals in distributed systems, with the ability to move quickly across a full-stack TypeScript and Kubernetes environment.
- Founder mentality with an obsession for shipping fast, navigating ambiguity independently, and maintaining high technical standards.
What makes it remarkable
Why this role is remarkable
- Work at the frontier of AI infrastructure, building the simulation environments used by leading research labs to train and reward next-generation agents.
- Join an elite founding team with deep experience scaling simulation systems at world-class autonomous vehicle and aerospace companies.
- Massive technical ownership in a low-ego environment where you will influence the core product architecture and ship code daily.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
About Jack & Jill
Meet Jack
Jack gets to know what you are great at, what you want next, and makes sure Jill considers you for the right opportunities.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
Jack