Founding Engineer — AI Expert Marketplace & Agents

Crossing Hurdles; San Francisco (CA); On-site; USD 140,000 - 210,000; Full time

Benefits offered by this job

Meaningful equity

Job summary

Crossing Hurdles is partnering with an AI startup that connects researchers and AI companies with domain experts. The role centers on scaling the recruitment engine, building a broad API, and developing agents for expert screening and marketplace interactions.

You will work directly with the CTO to shape architecture for autonomous agents and real-time voice, contributing to a growing, platform-focused stack including TypeScript, Next.js, Python, Postgres, and AWS.

Qualifications

• 3+ years of full-stack experience with TypeScript, React, and PostgreSQL.
• Experience with LLMs, voice AI agents, or evaluation systems.

Responsibilities

• Own and scale the recruitment engine, the algorithm that finds niche audiences via network traversal, ads, referrals, outbound, and more.
• Build and extend the API that research tooling and AI data companies integrate against.
• Develop agents to screen experts through voice and chat, assess work, identify fraud, and enable reliable reviews.
• Create marketplace systems for opportunity matching, pricing, feasibility estimation, and repeat engagement.
• Design onboarding, project instructions, ongoing work, and payouts for the expert experience.
• Own production behavior; investigate failures across product, background jobs, and external services.
• Collaborate with the CTO to shape architecture for autonomous agents, real-time voice, and global marketplace; stack includes TS, Next.js, Python, Postgres, AWS.

Skills

Full-stack development

TypeScript

React

PostgreSQL

LLMs

Voice AI

Evaluation systems

Tools

Next.js

Python

PostgreSQL

AWS

Job description

Crossing Hurdles is partnering with an AI startup that connects researchers and AI companies with domain experts. The role centers on scaling the recruitment engine, building a broad API, and developing agents for expert screening and marketplace interactions.

You will work directly with the CTO to shape architecture for autonomous agents and real-time voice, contributing to a growing, platform-focused stack including TypeScript, Next.js, Python, Postgres, and AWS.