You will design and deploy production-grade AI agents for the world’s largest real estate institutions. As an early engineer, you'll own end-to-end product workflows that automate complex acquisitions and development tasks. This role sits at the intersection of long-running agents and physical-world impact, scaling a platform already generating 7-figure revenue.
AI Engineer at Index Ventures-backed agentic AI startup
Join an elite team backed by Index Ventures and leaders from OpenAI to build the agentic AI stack for the built world. This San Francisco-based startup is already at 7-figure revenue, automating trillion-dollar real estate workflows that used to take weeks down to hours. As a generalist AI Engineer, you will own the end-to-end development of production-grade agents using LangGraph and Python. If you want radical autonomy, 0.3-1% equity, and the chance to solve hard, unsolved problems at the intersection of AI and physical infrastructure, this is your chance to do your life's work.
Overview
Role overview
Company
BUILD, Inc.
Index Ventures-backed agentic AI startup automating institutional real estate workflows
Responsibilities
What you will do
- Design, build, and deploy production-grade AI agents using Python, LangGraph, and modern LLM frameworks to automate high-stakes real estate workflows.
- Partner directly with domain experts and trillion-dollar asset managers to translate manual processes into autonomous, long-running agentic systems.
- Ship full-stack features end-to-end, taking full ownership of reliability, context engineering, and the technical outcomes of your code in production.
Candidate profile
Who this is a fit for
- Has 3-5 years of engineering experience, ideally at elite vertical AI or high-growth startups like Harvey, Scale AI, or Ramp.
- Demonstrates proven experience shipping production-grade LLM-based systems or agents that solve non-trivial, multi-step reasoning problems for real users.
- Possesses a full-stack engineering toolkit with a strong ownership mindset, capable of navigating ambiguity and moving with extreme velocity in a startup environment.
What makes it remarkable
Why this role is remarkable
- Join a high-velocity team backed by Index Ventures and C-suite leaders from Blackstone and OpenAI with a clear path to 8-figure revenue.
- Work at the frontier of agentic AI, building systems that reason over complex documents and visual data to accelerate massive global infrastructure projects.
- Gain a "founder's track" experience with radical autonomy and significant equity, learning to build a generational company from zero alongside elite 11x.ai alumni.
Jack & Jill
How Jack & Jill work together
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
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.