UI Product Designer

Proton is building an AI operating system for wholesale distribution. The UI Product Designer will shape the product’s look and interactions, own the design system across four products, prototype and iterate with AI tools, and learn directly from customers.

Responsibilities:

• Prototype in code with Claude Code or Cursor to feel an interaction before we commit
• Own the design system: components, interactions, documentation, and the harder part, getting every squad to use them
• Define what AI looks like here. Nobody has settled patterns yet, so you'll decide what it looks like when a rep trusts an agent and when they overrule one
• Work inside our agentic scrum model. We don't run two-week sprints; cadence follows what a team and its agents can ship, and you'll help work out what design looks like in that
• Get in front of customers constantly, including onsite. Distributors work in warehouses and on sales floors, and the best design calls come from standing next to a rep

Requirements:

• Command of typography, layout, color, hierarchy, and iconography, with motion when it earns its place
• Shipped products, real users, real ownership, alongside PM and engineering
• Daily, hands-on use of AI in your practice. Claude Code, Cursor, or equivalent, used to ship real work rather than generate comps
• A portfolio. Products or features you took from concept to launch where you set the visual language yourself
• You can author one beautiful screen and write the rules that let others make fifty consistent ones
• You've worked inside traditional scrum and know what those rituals were for
• Complex B2B, enterprise, or ERP-adjacent software, with high-frequency users and workflows people can't opt out of
• Agentic products, and the patterns for trust, correction, and handoff between a person and an agent
• Early-stage SaaS startups