Help us build the operating system for human longevity
Originate new product concepts from scratch, not just improve what exists
Design complete user journeys that translate complex biometric data into clear, motivating daily guidance
Ensure every flow serves behaviour change, not just usability: ask why a feature exists and what it helps the user to accomplish, not just how it should work
Hold the line on experience quality across the full app
Plan and run your own user research: interviews, usability tests, diary studies, and in-app feedback loops
Turn qualitative and quantitative signals into actionable design decisions
Build and maintain a clear picture of who our users are, what motivates them, and where we lose them
Bring user evidence into every design conversation
Produce wireframes, high-fidelity mockups, and interactive prototypes in Figma, moving fast without sacrificing precision
Design for the constraints of mobile: clarity, performance, and one-handed use
Maintain consistency across components, patterns, and interaction models
Collaborate closely with product and engineering to ship what you design
Define success metrics for your work and track them
Test your assumptions before and after launch
Spot what isn't working and fix it, with or without a brief

6 to 7 years of experience as a product or UX designer, with a portfolio that shows end-to-end ownership
Proven ability to originate product concepts, not just refine existing ones
Deep mobile app design experience: you understand iOS patterns, constraints, and work with a small screen
Strong user research skills: you design the study, run it, synthesise it, and act on it
Expert-level Figma skills and a clean, efficient design process
Fast prototyping and concept validation: you build lightweight, testable prototypes early to prove or disprove an idea before committing to full design
Able to design for behaviour change: you understand how habits form and how design can support or undermine them
Strong written English: your product design copy is natural and is an integral part of your designed flows
Takes ownership: makes well-reasoned calls independently rather than waiting for direction
Based in EU/UK timezone

Product Designer

Key skills