Hey, Callum here.
I design digital products that people actually use.

I'm a UK-based Product, UX and UI designer with over 15 years of experience. I work with startups and established companies to launch new products, refine existing platforms, and simplify the things that frustrate their users.

Callum Chapman, UK-based Product, UX and UI designer

I treat every project like it's my own — because I know what it takes to build something that lasts.

I don't just hand over mockups and move on. I get close to the problem, understand the users, and design solutions that hold up in the real world — not just in a pitch deck.

Through Circlebox Creative, I've also built, shipped and sold my own products, so I know what it's like to live with the design decisions long after the project ends. It changes how you think.

Some of my favourite projects

Work I've done for startups, scale-ups and established companies across fintech, healthtech, insurance and retail.

Revise — Trusted by top 10 pharma companies — 1 of 4
2020–Current

Revise

I’ve been leading design at Revise since 2020, starting with their Covid-19 clinical trial recruitment websites and now focused on Relay — their investigator portal that keeps sponsors in sync with clinical trial sites at scale. I handle everything from branding and UX to pitch decks and marketing sites.

Product DesignUser ExperienceMarketingBranding
Canaccord Genuity: Quest® — Analytical investment platform for institutional investors — 1 of 2
2015 & 2024

Canaccord Genuity: Quest®

Quest® is Canaccord Genuity’s institutional investment platform, covering around 20,000 global equities with proprietary cash flow analysis. I designed the original platform back in 2015, and was asked back in 2024 to redesign it from the ground up — bringing it in line with modern design standards while keeping the depth that institutional investors rely on.

Product DesignUser Experience
Howsy — Online lettings platform, acquired by Dexters Estate Agents — 1 of 2
2019–2022

Howsy

Howsy — originally launched as NoAgent — made renting simpler for landlords and tenants. I was the lead designer from day one, fine-tuning their web and mobile apps over many years until the platform was acquired by Dexters Estate Agents in 2022.

Product DesignUser ExperienceMarketing
Airtime Rewards — Earn credit towards your phone bill, just by shopping
2019–2022

Airtime Rewards

Airtime Rewards lets 4.5m+ members earn credit towards their mobile phone bill by shopping with over 200 partner brands like Boots, Greggs, Argos and Tesco. I was hired to lead the redesign of their iOS and Android apps, working closely with an external branding team.

Product DesignUser Experience
Hazy — Automatic GDPR compliance for secure data sharing — 1 of 2
2017–2019

Hazy

Hazy is a secure data sharing platform that makes GDPR compliance automatic — developed by top academics and trusted by the likes of UCL, Microsoft Ventures and the Ministry of Defence. I was hired as the lead designer to design their web application and marketing website.

Product DesignUser ExperienceMarketing
Quorso — The #1 Intelligent Management Platform for Store Performance
2016–2017

Quorso

Quorso helps retail managers spot where budgets are bleeding and turn insight into action that improves the bottom line. I was the lead designer for the entire product in its early stages, taking it from idea to launch — shaping the dashboard and workflows used by teams across hundreds of stores.

Product DesignUser Experience
Artificial — Quote-to-bind insurance software for high-profile London firms
2015–2021

Artificial

I originally worked with Artificial when they were a design agency, partnering with their team on dozens of client projects. When they pivoted into insurance, I designed and built their quote-to-bind software alongside their in-house designer — now used by high-profile insurance firms across London.

eCommerceUser ExperienceInterface Design
Opendesk — A global platform for local making
2014–2016

Opendesk

Opendesk is a global platform for local making — connecting customers to a library of digital furniture designs and a network of local craftsmen who build them on demand, anywhere in the world. I was hired to lead the redesign of their eCommerce website.

Product DesignUser Experience
Chelsea Kitchen — High-end London food delivery from top chefs
2014

Chelsea Kitchen

Chelsea Kitchen is a high-end London food delivery service, bringing fully prepared meals cooked by some of the city’s top chefs straight to your door. I worked with LogicSpot (now Unified) as the lead designer on the launch of the business.

eCommerceUser ExperienceInterface Design

Services

What I can help you with.

Whether you're building from scratch, redesigning what's already there, or fixing what isn't working, I'll help you ship something your users will thank you for.

Product Design

From first concept to production-ready screens. I embed with your team to define the real problem, explore the right solutions, and deliver designs your engineers can build.

UX Design

Research, flows, wireframes, and prototypes — all grounded in how your users actually behave, not how you assume they do.

UI Design

Pixel-level interface design that's clean, consistent, and built to scale. No decorative fluff — every element earns its place.

Design Systems

Component libraries, guidelines, and documentation that keep your product looking and feeling coherent as you scale — without needing me in the room.

Got a project in mind?

Send me a few lines about what you're working on. No pitch deck needed — just the basics. I'll get back to you within a day.