As a Founding Design Engineer at Trajectory, you will craft the product experience that makes continual learning legible and intuitive.
You will own the visualization, interaction, and developer experience surfaces that help customers understand, debug, and trust continually improving models. This includes trajectory visualization, evaluation workflows, monitoring dashboards, and the core product interfaces that sit on top of our leading RL infrastructure.
You’ll work directly with the founders and industry-leading design partners (Series B+ AI vertical product companies) to translate frontier RL systems into a clean, developer-first product experience. You will help define the visual language, interaction patterns, and product philosophy of Trajectory.
We are building the interface for continual learning. This role sets that bar.
Note: Some travel may be required - we work closely with design partners across the world.
Trajectory is a research and product lab founded by three Stanford alumni - Michael (DeepMind Robotics Reasoning), Arjun (RL post-training at Apple), and Ronak (Windsurf/DeepMind; trained SWE-1, the coding model that learned from real product signal and beat the labs).
Their work showed the future: products will own models that continually learn from real user workflows.
Trajectory makes that plug-and-play. We use live product telemetry to RL-train custom agentic models - no synthetic environments, no hand-crafted rewards.
We’ve raised $15.5M led by Conviction, backed by Fei-Fei Li, Jeff Dean, and founders of Notion, Linear, Hugging Face, and Dropbox.
We’re building our early team of founding Members of Technical and Product Staff to define the future of continually learning systems.