Reactor is building the inference platform for real-time world models. Our goal is to democratize access to real-time intelligence to unlock next-generation use cases in media, physical AI and omni-directional models. We already run the largest and fastest catalog of world models on the market, and work closely with all major model labs to run and optimize their world models, including Alibaba, Amazon, and NVIDIA. Our team is made of alumni from leading firms such as Apple, Meta, Amazon, Microsoft, Luma AI, Adobe, Stability AI, and more. We've raised $74M led by Lightspeed, with Amplify Partners, WNDR, NVIDIA, Sapphire, and other Tier 1 investors participating. Jeffrey Katzenberg, co-founder of DreamWorks Animation, sits on our board of directors.

The Role

Robotics teams want to run the newest models on their robots. You'll build the product that makes that work.

You'll spend real time with our robotics customers, watch how they work, and turn what you see into software: a fix today, a feature next week, a platform capability when the same problem keeps showing up. One day that's debugging a robot-to-cloud connection. The next it's tightening a policy deployment workflow, or building a simulation view in the browser so a customer can see what their robot is about to do.

We want someone who can follow a problem all the way through the stack, and who cares as much about what the user sees as about how it's built.

This role is in person at our SF office.

What You'll Do

Work directly with customers. Sit with their workflows, dig into failures, and figure out what would make their week easier.
Turn open-ended asks into clear requirements, then decide what's a quick fix, what's a feature, and what belongs in the platform.
Ship across the web UI, backend services, APIs and infrastructure.
Trace problems across robot software, networking, cloud services and model inference, using logs, measurements and reproducible tests.
Build simulation and visualization tools that let customers set up environments, inspect robot behavior and test policies.
Keep up with robotics research and tooling, try what looks useful, and bring it into the product when it earns a place.

Who You Are

You've shipped production software from first idea to people actually using it.
Hands-on robotics experience. Deploying learned models or policies on physical robots is a big plus.
You build across the stack, from front-end interfaces to backend services and infra.
Product judgment: you talk to users, work out what they actually need, and decide what to build.
You debug across application, networking and infrastructure boundaries without assuming the bug lives in one place.
You read robotics research and can turn a good idea into working software.

Bonus points

Python, C++, Rust, TypeScript/React or Go.
ROS 2, MuJoCo or Isaac Sim.
Interactive 3D, browser graphics or simulation interfaces.
Policy serving, teleoperation, robotics datasets or evaluation workflows.
Cloud infra, containers, WebRTC and real-time streaming.

You don't need all of these. We care most about what you've built, how you handle unfamiliar problems, and whether you can turn a customer's need into software.

Benefits

Competitive SF salary and meaningful early equity
Visa sponsorship and relocation support
Generous health, dental, and vision coverage

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