Senior Product Designer

You are a versatile designer who thrives with ambiguity, who can move at [REDACTED] speed while keeping the UI fast + consistent.

Must Have

• Strong product UI/visual craft + portfolio of shipped work.
• Experience designing web AND mobile product experiences: can create dedicated mobile screens (not just "responsive web") and understands mobile UI patterns, navigation paradigms, constraints, and edge cases.
• Solid design systems experience (components/tokens/variants/docs + working with engineering for adoption).
• Comfortable owning features end-to-end (flows → UI → handoff → QA) in a high-velocity startup.
• AI-assisted / "vibe coding" prototyping mindset (uses modern tools to prototype quickly; production code not required, but code-based prototyping is a plus).
• Can run scrappy user research/testing and iterate based on customer feedback.
• Accessibility + responsive fundamentals (but again: must also design true mobile experiences).
• Strong cross-functional communication; can define success metrics with PM/Eng and iterate post-launch.

Key responsibilities

• Own end-to-end product design for features (problem framing → flows → UI → states/edge cases → handoff → QA → iterate).
• Design across web + true mobile experiences (dedicated mobile screens + mobile patterns; not just responsive web).
• Help build/maintain the design system (components/tokens/patterns/docs) and drive adoption with engineering.
• Prototype fast (Figma + AI/vibe-coding tools when useful) to validate direction.
• Partner tightly with Eng/PM to ship quickly, keep quality high, and improve post-launch with feedback.
• Do lightweight user research/testing (scrappy usability checks, customer calls, quick validation).
• Nice-to-have "extra output" when needed:…