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Applied AI Engineer, Video Agent

HeyGen· Engineering
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Hybrid (San Francisco, CA), Hybrid (Palo Alto, CA), Hybrid (Los Angeles, CA), Hybrid (Toronto, ON)$180k - $240kfull-timePosted 2w ago

About the role

Role focused on building and improving the Video Agent, an end-to-end AI agent that plans, scripts, selects avatars/voices/visuals, integrates tools, and interfaces with rendering pipelines. Own features from idea to launch, work with in-house models, and collaborate across product, research, and rendering teams.

Responsibilities

  • Build the agent. Design the tools, prompts, and context the agent works with. Improve how it plans, how it recovers from mistakes, and how it handles long, multi-turn conversations.
  • Measure quality. Build evals and offline replays of real sessions. Run experiments behind feature flags and read the results honestly. Watch real user sessions and agent traces to find where things go wrong.
  • Ship across the stack. Build user-facing features in TypeScript and React. Build backend services and long-running workflows in Python and Go.
  • Work closely with others. Partner with product managers, designers, and the research and rendering teams that the agent depends on.

Qualifications

  • You have built and shipped an AI agent that real people use. A system where a model calls tools, plans across several steps, and acts on the results.
  • You know how to tell whether an AI system got better. You have built evals or test sets for model behavior.
  • You are a strong full-stack engineer. 2+ years of professional experience. Fluent in TypeScript and React on the frontend and Python on the backend.
  • You have strong product sense and ownership.

Skills

Required:AI agent design and developmentEvaluation and experimentationFull-stack developmentProduct sense

Benefits

  • $180,000 – $240,000 annually
  • Equity in a high-growth AI company
  • 401K Match
  • Health, dental, and vision benefits
  • Flexible PTO
  • Opportunity to help define a new category in AI video
  • High ownership, high velocity, and direct impact on revenue growth
Last updated Oct 7, 2026. Interested? Apply on the company site.
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About HeyGen

Free AI Video Generator: Create Stunning Videos with AI

Create AI videos from your ideas using HeyGen. Input text, image, or audio to create complete videos with narration, captions, visuals, and animations.

AI video generatorAI avatarstext-to-videoimage-to-videovoice cloninglip-syncvideo translationlocalization
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