Video AI Agent Engineer — Build & Measure Smarter Agents

We Love AI Jobs; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

HeyGen is hiring for a Video Agent role in San Francisco, on-site. You will design the agent's tools and prompts, improve planning and recovery from mistakes, and ship user-facing features in React with backend services in Python and Go.

You will work closely with product managers, researchers, and rendering teams to deliver end-to-end video agent capabilities. The role emphasizes building evals, running experiments, and owning features from ideation through launch and follow-up, with a focus on

Qualifications

• You have built and shipped an AI agent that real people use.
• You have built evals or test sets for model behavior and can distinguish real improvement from noise.

Responsibilities

• Build the agent. Design tools, prompts, and context to improve planning and recovery from mistakes.
• Measure quality. Build evals and offline replays of real sessions; run experiments behind feature flags.

Skills

AI agents

AI evaluation

TypeScript

React

Python

Go

AB testing

Feature flags

Tools

TypeScript

React

Python

Go

Job description

HeyGen is hiring for a Video Agent role in San Francisco, on-site. You will design the agent's tools and prompts, improve planning and recovery from mistakes, and ship user-facing features in React with backend services in Python and Go.

You will work closely with product managers, researchers, and rendering teams to deliver end-to-end video agent capabilities. The role emphasizes building evals, running experiments, and owning features from ideation through launch and follow-up, with a focus on