Expertise

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.

Expertise

SaaS Product Design

SaaS product designer helping teams improve onboarding, dashboards, UX clarity, design systems and scalable product experiences.

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Expertise

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.

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Expertise

Product Design Systems

Design systems specialist helping teams create scalable UI systems, stronger consistency and more efficient product design across growing digital products.

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Expertise

UX Strategy Consulting

UX strategy consultant helping teams improve product clarity, user journeys, structure and design direction across digital products.

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Expertise

Mobile App Design

Mobile app designer in the UK helping teams create stronger app UX, cleaner interfaces, better flows and more coherent digital products.

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Expertise

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.

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Expertise

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.

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Expertise

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.

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Expertise

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.

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Expertise

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.

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Expertise

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.

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