As a Founding AI Engineer, you will define the foundations of a sophisticated agentic matchmaking system. You will design human-like chat agents, optimize RAG pipelines, and build robust evaluation harnesses. Working directly with co-founders in a high-ownership environment, you will bridge the gap between AI research and production-ready products that reason and act.
This job is no longer actively hiring. Talk to Jack to find live roles.
AI Engineer at fast-growing agentic AI startup
Are you ready to build the future of agentic AI? We are looking for a Founding AI Engineer to join an elite team of fewer than 10 people in Berkeley. You will own the end-to-end loop for human-like chat agents and intelligent matchmaking systems, working directly with co-founders to move AI from research to production. If you have 2-4 years of experience with LLMs, RAG, and high-performance TypeScript/Python, this high-ownership role at a well-funded startup offers the chance to define the technical foundations of the next generation of AI products.
Want to apply for this role?
C
This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
Berkeley, United States
Compensation
Not Disclosed
Company
Confidential company
Role overview
About the company
Fast-growing agentic AI startup
What you will do
- Ship end-to-end agentic matchmaking systems, moving from research to production with measurable accuracy improvements.
- Design and maintain context engineering pipelines including RAG, summarization, and memory management for complex conversations.
- Build internal observability tools and evaluation harnesses to track model performance, latency, and hallucinations.
Who this is a fit for
- Professional experience or a standout portfolio building LLM applications with providers like OpenAI or Anthropic.
- Strong proficiency in TypeScript for product code and Python for model operations and data evaluation.
- Hands-on expertise with RAG, vector databases, and prompt engineering to solve real-world reliability challenges.
Why this role is remarkable
- High-impact founding role with direct reporting to co-founders in a team of fewer than 10 people.
- Opportunity to build complex agentic systems from scratch, including tool-use, reasoning, and memory foundations.
- Backed by top-tier VCs in an iterative, fast-moving environment where your decisions define the product roadmap.
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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
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 your profile’s a match and Confidential company wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.