Senior Product Designer, AI

You will design and build AI-native interaction paradigms while partnering with engineering to implement and refine features in production. Additionally, you will develop evaluation frameworks and skills to ensure AI systems behave predictably and effectively.

Responsibilities

• Start with AI, stay with AI
• Use LLMs to clarify scope, draft specs, surface edge cases, and align the team before committing to a direction
• Prototype in code
• Build working interfaces with Cursor and Claude Code
• Partner directly with engineering to decide what moves into the product and what stays as a validated spike
• Bring it to production
• Fix small interaction and refinement issues directly on prod code
• Design new AI interaction paradigms for conversational interfaces
• Invent and validate novel patterns for how users converse with, direct, and trust AI systems
• Write evals, skills, and help on tools
• Build the scaffolding that makes AI reliable: evaluation frameworks, reusable skills, and tooling that helps Sigma's AI features behave predictably and improve over time
• Shape model behavior
• Iterate on evals and training to improve AI performance on design output

Requirements

• 4+ years in interaction design or design engineering
• Recent hands-on AI tooling experience
• Demonstrated use of AI coding assistants to ship real product
• Experience writing evals, agents, prompt libraries, or skills for AI systems
• Strong interaction design fundamentals
• Opinions about AI UX: trust signals, error recovery, progressive disclosure of reasoning and real examples

Benefits

• Equity
• Generous health benefits
• Flexible time off policy
• Paid bonding time for all new parents
• Traditional and Roth 401k
• Commuter and FSA benefits
• Lunch Program
• Dog friendly office

Key Skills