John is available for hire

John Robert Pett

Verified Expert in Engineering

UI Developer

Location

Leeds, United Kingdom

Toptal Member Since

February 1, 2017

John is an award-winning UI developer with 10 years of experience and a keen eye for design, animation details, and code quality. His recent projects include work for Adidas, HMRC, Channel 4, Le Col Cycling, Resident Advisor, and Robinsons Soft Drinks. John has a bachelor's degree in visual communication from Leeds University and brings a wealth of interface development knowledge to independent and enterprise businesses alike.

UI Development CSS3 Animation User Interface (UI)Caching WordPress Themes React Git WordPress JavaScript CSS HTML5 Sass jQuery HTML5 APIs UI Design

Portfolio

Container Studio

CSS, Git, HTML, HTML5, Information Design, JavaScript, Jest, Material UI, React...

Savvy Marketing

JavaScript, React, WordPress, SCSS, Design, Git, PHP, HTML, Shopify, Sass...

Accenture

JavaScript, React, SCSS, Git, HTML, Jest, Storybook, 2D, 3D, Sass, HTML5...

Experience

SCSS - 10 years JavaScript - 10 years React - 10 years Git - 10 years UI Development - 10 years Interaction Design (IxD) - 10 years User Interface (UI) - 10 years Next.js - 4 years

Availability

Part-time

Preferred Environment

JavaScript, React, WordPress, SCSS, Webpack, CSS3, HTML5, Vanilla JS

The most amazing...

...thing I've done was shaping Adidas retail in Beijing with RFID-integrated touchscreens, giving users a rich media experience.

Work Experience

Lead UI Developer

2016 - PRESENT

Container Studio

Implemented the UI for Unmade, using the browser to assist in designing and manufacturing knitwear. This won a D&AD award for the agency and made Unmade the most innovative textile startup in the industry, setting a standard for fashion tech.
Worked for Harbour Space University as a lecturer of creative coding and a developer on the team building its main website. The project helped launch Harbour Space as a leading institution in technology education.
Created the online presence of musician and performer David August. The site received critical acclaim from industry peers for style and typography.
Led the redesign and development of the East Street Arts charity. Created a full-stack solution with generative design patterns to reduce employees' work when creating assets for the website.
Served as a senior website developer for The Seasons, part of the Maybourne Hotel Group. Created an events and activities portal, which generated a community of repeat visitors to the local area and hotel.

Technologies: CSS, Git, HTML, HTML5, Information Design, JavaScript, Jest, Material UI, React, SCSS, WP Engine, Sass, TypeScript, Storybook, User Experience (UX), User Interface (UI), User Interface Engineering (UIE), Responsive UI, Responsive UX Design, Adobe CC, Webflow, Figma, API Integration, UI Design, UX Design, HTML5 APIs, Angular, UI Development, SVG Animation, WordPress REST API, WordPress API, Next.js, Shopify API, Webpack, WordPress, PHP, Design, Typography, GreenSock Animation Platform (GSAP), Google Maps API, UI Animation, APIs, Interaction Design (IxD), CSS3 Animation, CSS3, Vanilla JS, Mobile UI, Touch Interactions, Video.js, Animated Interactions, Web Project Management, HTML5 Canvas, Responsive Web Design (RWD), Photoshop CC, Adobe Illustrator, SVG, Interactive UI, HTML Email, HTML Templates, Mailchimp, Moment.js, jQuery, 2D, SEO Tools, Scroll Animations, Landing Pages, Accessibility, Web Accessibility, Tailwind CSS, Web Performance Optimization (WPO), WordPress Themes, REST APIs

Senior UI Developer

2021 - 2022

Savvy Marketing

Developed software to integrate Le Col cycling's website and marketing into Strava to create activity-based competitions and reward schemes. This created a unique online experience for users to engage with the brand via daily activities.
Created multiple competition applications for Robinsons Soft Drinks, including interactive games. My work included HTML5 canvas game development and animation work, and audience capture scaled beyond anything previously achieved within the brand.
Built multiple applications to assist Adidas Sportswear's internal communications department in streamlining its online marketing, including campaigns, audience capture, and user management.

Technologies: JavaScript, React, WordPress, SCSS, Design, Git, PHP, HTML, Shopify, Sass, HTML Email, HTML Templates, Next.js, Mailchimp, WordPress API, Responsive Web Design (RWD), GreenSock Animation Platform (GSAP), HTML5 Canvas, Adobe CC, Animated Interactions, Video.js, UI Development, Figma, SVG Animation, WordPress REST API, Shopify API, Webpack, CSS, Typography, UI Animation, APIs, Interaction Design (IxD), CSS3 Animation, CSS3, Vanilla JS, Mobile UI, Touch Interactions, API Integration, Responsive UX Design, Responsive UI, User Interface Engineering (UIE), User Interface (UI), Photoshop CC, User Experience (UX), Adobe Illustrator, SVG, Interactive UI, Webflow, Moment.js, jQuery, 2D, SEO Tools, Scroll Animations, Landing Pages, Accessibility, Web Accessibility, Web Performance Optimization (WPO), WordPress Themes, REST APIs

Senior UI Developer

2019 - 2021

Accenture

Created a component library to rebrand Channel 4 television's online presence, allowing consistent design across all applications. My work was recognized as a benchmark for Accenture technology standards.
Developed software applications to assist His Majesty's Revenue and Customs (HMRC) in managing COVID-19. The project received direct praise in the press from Rishi Sunak, and all developers were awarded a badge for societal contribution.
Designed a component library to align design styles across all HMRC software and online applications. With great attention to accessibility, this became a world-renowned example of design for disability.

Technologies: JavaScript, React, SCSS, Git, HTML, Jest, Storybook, 2D, 3D, Sass, HTML5, HTML5 APIs, UI Development, UX Design, Interactive UI, Figma, Django, UI Design, TypeScript, Webpack, CSS, Design, Typography, UI Animation, APIs, Interaction Design (IxD), CSS3 Animation, CSS3, Vanilla JS, Mobile UI, Touch Interactions, Video.js, API Integration, Animated Interactions, Web Project Management, HTML5 Canvas, Responsive Web Design (RWD), Adobe CC, Responsive UX Design, Responsive UI, User Interface Engineering (UIE), User Interface (UI), Photoshop CC, User Experience (UX), SVG, HTML Templates, Moment.js, jQuery, SEO Tools, Scroll Animations, Landing Pages, Accessibility, Web Accessibility, Tailwind CSS, Web Performance Optimization (WPO), WordPress Themes, REST APIs

Front-end Developer

2015 - 2016

B-Reel

Worked on a creative data presentation for Yahoo and Cannes. Developed a web-based iPad app, enabling the easy display of digital content, animation for iOS, and JavaScript web animations. Tens of thousands of festival visitors saw this work.
Worked on GeoVegas for the Las Vegas tourist board, utilizing 360-degree panoramas in collaboration with Google. This work positively impacted tourism in Las Vegas and the surrounding area and businesses.
Developed an eCommerce and multimedia app for a new season campaign for Balmain and H&M. The app featured extensive browser animations and high-quality asset rendering, and all clothing sold out within 24 hours of site deployment.
Worked on Zalando's Share Your Sexy Campaign, using images from Instagram and third-party APIs to create user-generated content. This work contributed to increased sales for Zalando in Spain.
Contributed to Zalando's Ivy Park collaboration, using high-quality image assets and video in a brochure-style eCommerce platform. Clothing sales increased instantly upon project completion, launching Ivy Park in Europe.

Technologies: React, JavaScript, SCSS, HTML, CSS, Sass, GreenSock Animation Platform (GSAP), HTML5 APIs, HTML5, UI Development, CSS3, CSS3 Animation, Responsive Web Design (RWD), Google Maps API, Angular, iPad, Mobile UI, SVG Animation, Git, Typography, Webpack, UI Animation, APIs, Interaction Design (IxD), Vanilla JS, Touch Interactions, Video.js, API Integration, Animated Interactions, HTML5 Canvas, Adobe CC, Responsive UX Design, Responsive UI, User Interface Engineering (UIE), User Interface (UI), Photoshop CC, User Experience (UX), SVG, Interactive UI, Moment.js, jQuery, 2D, SEO Tools, Scroll Animations, Landing Pages, Accessibility, Web Accessibility, Web Performance Optimization (WPO), WordPress Themes, REST APIs

Interaction Designer

2013 - 2015

AIG Edenspiekermann

Created online cartography products for Heathrow Airport using Leaflet. These products simplified the airport experience and reduced airport transport times as customers could move through the airport more easily.
Designed and developed the agency's website, featuring a unique grid system to display its work and gain a strong web presence among its peers.
Created an interactive touchscreen for Transport for London (TfL), a government agency, using the TfL data API. This work received a Queen's Contribution to Design Award as a first-in-kind use of technology in the cartography space.
Researched and developed mobile mapping in Heathrow Airport using HTML5 APIs and used it to develop navigation tools for airport users.
Created a city map in the browser for Vancouver, Canada, using Leaflet and tiling techniques to create graphically rich maps with JavaScript. This increased tourists' ease of navigation within their respective cities.
Led the UX design for digital applications across the company.

Technologies: HTML5, JavaScript, CSS, Design, Typography, HTML, Sass, UI Design, UI Development, Adobe Illustrator, SVG, Leaflet, Google Maps API, Adobe CC, SVG Animation, WordPress API, SCSS, WordPress, PHP, Git, GreenSock Animation Platform (GSAP), UX Design, Cartography, UI Animation, APIs, Interaction Design (IxD), CSS3 Animation, CSS3, Vanilla JS, Mobile UI, Touch Interactions, Video.js, API Integration, Animated Interactions, HTML5 Canvas, Responsive Web Design (RWD), Responsive UX Design, Responsive UI, User Interface Engineering (UIE), User Interface (UI), Photoshop CC, User Experience (UX), Interactive UI, HTML Email, HTML Templates, Mailchimp, Moment.js, jQuery, 2D, Processing.js, SEO Tools, Scroll Animations, Landing Pages, Accessibility, Web Accessibility, Web Performance Optimization (WPO), WordPress Themes, REST APIs

Experience

Channel 4

https://www.channel4.com/

An on-demand TV and film application for British TV Channel 4. Video streaming and content information are available via this portal. I built a React Storybook component library to align all design elements across all related Channel 4 applications.

Adidas Home Court Arena

https://startdesign.com/case/redefining-the-retail-experience/

An interactive tabletop application for Adidas in Beijing that allows users to find associated marketing and product information in-store. This project led to multiple international Adidas stores utilizing the same approach to in-store promotion.

Harbour Space

https://harbour.space/

A brochure-style site for a new technology university in Barcelona, Spain. As the front-end developer and UI designer, I created interactive pages to attract new students (worldwide) to the university.

HMRC Government Portal

https://www.gov.uk/

Created reusable components for all government-related sites to maintain a consistent design and user experience. My UI development and interaction design were vital in making this project a benchmark for government services.

Gravis Capital

https://www.graviscapital.com/

Developed a Craft CMS app for Gravis Capital to display its investment portfolio in a clean, modern, and informative way. I delivered CSS and JavaScript animations and a clean implementation of a mobile responsive design.

Le Col Cycling Club

https://lecol.cc

A React and Next.js application integrated with Strava, allowing users to accumulate points via exercises and competitions. I created CSS and JavaScript animations to display datasets from users' Strava profiles.

Applied Wayfinding

http://appliedwayfinding.com/

Completed multiple web cartography projects, including interactive signage and urban mapping. These solutions use web technologies to make cities more navigable and consumable for local residents and tourists.

Composer Trade

https://www.composer.trade/

A Next.js application focused on a clean and modern design aesthetic with particular attention to SEO. Indexability was increased tenfold by using multiple Google tools for SEO optimization. Design implementation with Tailwind plugin development was a large part of this project.

Unmade

https://www.unmade.com/

Unmade also uses its technology in collaboration with major brands like New Balance. Responsible for web development of a browser-based application that allows users to manipulate and design knitting patterns on their own devices and purchase their unique creations.

Transport for London

http://appliedwayfinding.com/projects/real-time-digital-information-mapping/

A real-time, interactive mapping platform for use as a prototype for the future of city navigation. The initial prototype placed on Oxford Circus in London to test the validity of interactive software applications in the urban environment.

Balmain x H&M

https://projects.balmain.com/gb/balmain/projects/balmain-x-hm

Development of a web application targeted at the iPad, tablets, and touch devices to promote the collaboration of Balmain and H&M. The applications contained an eCommerce component, a brochure-like section for garment promotion, and several videos and interactive elements to promote the brands.

Teamable

https://www.teamable.com/

Teamable is an AI-powered recruitment platform requiring an informative UI to present their business and individual subscription plans for the multi-tool software they offer, built with a static WordPress website with Figma.

Haseltine Lake Kempner

https://www.hlk-ip.com/

An animated site for IP visionaries HLK. Built using WordPress — utilizing animation with both CSS and GSAP — to create some unique touches and a sense of excitement for the brand, plus a lot of colours!

Leeds Alumni Digital Magazine

https://magazine.alumni.leeds.ac.uk/

An online magazine for alumni of Leeds University in West Yorkshire. Using WordPress, I built a reusable structure to house articles, ongoing activities, and the latest news at the centre for education in the North of England. Work included management and liaison between the design studio and the client university, allowing stakeholders to inform how the product worked.

Resident Advisor

https://group.ra.co

A public portal built on WordPress. The portal gives access to all areas of business in which this digital music platform exists. This gateway improved commercial awareness for international event promoters, allowing new businesses a separate web space.

Skills

Languages

SCSS, JavaScript, CSS, HTML, HTML5, Sass, CSS3, PHP, TypeScript

Frameworks

Next.js, Video.js, Vanilla JS, Tailwind CSS, Jest, Material UI, Django, Angular

Libraries/APIs

React, jQuery, HTML5 APIs, Google Maps API, WordPress API, WordPress REST API, GSAP, REST APIs, SoundCloud API, Leaflet, Tumblr API, Spotify API, Moment.js, Shopify API, HTML5 Canvas, Vimeo API

Tools

Git, Webpack, Figma, Adobe Illustrator, Mailchimp, Adobe CC, Photoshop CC, GitHub

Paradigms

UI Design, Web Performance Optimization (WPO), UX Design, Responsive Web Design (RWD)

Platforms

WordPress, GreenSock Animation Platform (GSAP), Shopify, Craft CMS, Webflow, Vercel, Contentful

Other

Typography, UI Development, CSS3 Animation, User Interface (UI), SEO Tools, Scroll Animations, Landing Pages, HTML5 Video, Caching, WordPress Themes, Design, UI Animation, APIs, Cartography, Interaction Design (IxD), SVG, Interactive UI, HTML Email, HTML Templates, User Experience (UX), User Interface Engineering (UIE), Responsive UI, Responsive UX Design, Web Project Management, Animated Interactions, API Integration, Mobile UI, Accessibility, Web Accessibility, Google Structured Data, Storybook, Information Design, Processing.js, 2D, 3D, Strava API, iPad, SVG Animation, Gatsby, Touch Interactions, Vimeo, Radix

Storage

WP Engine, Google Cloud

Education

2006 - 2009

Bachelor's Degree in Visual Communication

Leeds University - Leeds, United Kingdom

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring