Senior Open Source Design Engineer

Arize AI is a leading AI & Agent Engineering observability and evaluation platform, empowering AI engineers to ship high-performing, reliable agents and applications. The role involves designing, prototyping, and shipping interfaces that enhance the interaction between AI teams and their systems, focusing on both user experience and agent experience.

Responsibilities:

• Design and build compelling product experiences for Arize Phoenix across UI-driven and programmatic workflows
• Create interactive visualizations for embeddings, traces, evaluation runs, and agent/tool workflows
• Develop reusable components and templates for our design system, from concept to production
• Build Agent Experience primitives: interaction contracts, human-in-the-loop workflows, and agent-friendly UI surfaces
• Enable agents to query, navigate, trigger evaluations
• Shape the patterns that define how humans and AI agents collaborate within a shared workspace
• Prototype new AI features and UI patterns for visualizing performance, surfacing anomalies, and explaining AI behavior—especially for multi-step agent systems
• Use AI-assisted UI generation to accelerate prototyping while maintaining craft, accessibility, and consistency
• Push the boundaries of what's possible when your users include both humans and machines

Requirements:

• Strong frontend engineering skills (React, TypeScript)
• Deep thinking about interaction design, information architecture, and developer experience
• Curiosity about AI systems and eagerness to learn how agents, evaluations, and observability work
• Enjoyment of prototyping quickly and iterating toward polish
• Care about accessibility, performance, and craft
• Thrive in open-source communities and async collaboration