About the role

What we’re building\
Respan is building the self-driving observability and evals platform for AI teams, used by 60+ YC companies and hundreds of AI teams.

The role

You will own the frontend architecture of Respan's platform: trace visualizers, eval dashboards, prompt editors, and the design system that ties it all together. This is a senior role with real architectural ownership. We are looking for someone who is opinionated about code quality, focused on performance, and can mentor the team on frontend best practices while still shipping fast.

What you’ll do:

Architect and build high-performance UI with React and Next.js
Own the frontend architecture, component library, and design system
Collaborate closely with design to ship pixel-perfect, accessible interfaces
Mentor other engineers on frontend best practices and code quality
Drive performance optimization across the platform UI

What you must have:

5+ years of frontend engineering experience with TypeScript and React
Deep knowledge of modern CSS, layout systems, and animation
Strong opinions on code quality, testing, and component architecture

Strong plus:

Experience building complex data-heavy UIs such as dashboards, editors, or visualizers
Track record of building and maintaining design systems
Experience with performance profiling and optimization
Contributions to open-source frontend projects or libraries

About the company

Respan (formerly Keywords AI) gives teams a unified control plane to trace and evaluate agent behavior without guesswork, automatically surface issues, and fix what breaks faster. Respan connects production observability, automated and human-in-the-loop evaluations, and an adaptive AI gateway to close the loop between detection, decision, and action - so agents improve continuously in production.

Respan is trusted by 100+ AI startups and enterprise teams. Today, the platform process 1B+ logs and 2T+ tokens every month, supporting more than 6.5M end users.