Trajectory
Member of Technical Staff - Design Eng
San Francisco · On-site · Staff · Full-time · Posted May 26, 2026
About the job
Design and build product interfaces that make continual learning understandable, usable, and trustworthy, including visualization, evaluation, monitoring, and developer experience.
What you'll do
- Own visualization, interaction, and developer experience surfaces, including trajectory views, evaluation workflows, and monitoring dashboards.
- Create polished core product interfaces on top of Trajectory’s RL infrastructure.
- Help define the product’s visual language, interaction patterns, and philosophy in collaboration with founders and design partners.
What they ask for
- Strong frontend or design engineering experience (TypeScript/React or similar).
- Experience building polished, production user interfaces.
- Strong product taste and the craft to deliver high-quality software experiences.
- Experience building AI-powered products or agent systems.
Nice to have
- Experience building data visualization or complex technical UIs, or observability or debugging interfaces.
- Background at high-craft product companies or developer tooling startups; experience working closely with designers is also welcomed.
Tools
TypeScript, React
AI focus
Build interfaces for a platform that helps companies use product signals to continually post-train agentic models.
Model-written summary · the original posting is authoritative