Product design expertise pages
These pages cover the main areas I work across most often: SaaS, marketplaces, mobile products, startup design, design systems and UX strategy.
SaaS Product Design
SaaS product designer helping teams improve onboarding, dashboards, UX clarity, design systems and scalable product experiences.
Marketplace UX Design
Marketplace UX design for two-sided platforms, discovery products and trust-led user flows. Better structure, clearer journeys and stronger product thinking.
Product Design Systems
Design systems specialist helping teams create scalable UI systems, stronger consistency and more efficient product design across growing digital products.
UX Strategy Consulting
UX strategy consultant helping teams improve product clarity, user journeys, structure and design direction across digital products.
Mobile App Design
Mobile app designer in the UK helping teams create stronger app UX, cleaner interfaces, better flows and more coherent digital products.
Startup Product Design
Product designer for startups helping founders shape stronger products, sharper UX and more credible interfaces from early stage to launch and growth.
Full-Stack Product Designer
William Mattey is a full-stack product designer who designs and ships products end to end — product strategy, UX, UI, and working front-end code — for founders in startups, fintech, and SaaS.
AI Product Designer
AI product designer for founders building AI-powered products. William Mattey designs and ships AI products end to end — strategy, UX, UI, and working front-end code.
Product Builder
Product builder for founders who need their product made real. William Mattey takes products from 0-to-1 — strategy, design, and working front-end code — as one hire.
Product Designer UK
UK-based product designer for startups, fintech and SaaS. William Mattey offers senior product strategy, UX, UI and full-stack build from the UK, working remotely with founders and teams.
Front-End Designer
Front-end designer who designs and builds. William Mattey bridges design and engineering — UX and UI plus production front-end code in Next.js, React and TypeScript.