Case Studies

Selected case studies from complex web platform and product engineering work for major brands.

  1. Virgin Atlantic
    & Holidays

    Lead engineer on this massive replatforming project, unifying twelve disparate applications under a new headless architecture with React and Next.js.

    Screenshot of the Virgin Atlantic & Holidays website; part of John Kavanagh's selected project work.

  2. Microsoft Edge
    DevTools

    Principal engineer leading AI‑driven browser tooling within Microsoft Edge DevTools, delivering in‑browser features including real‑time content simplification, integrated issue reporting, and structured developer feedback pipelines.

    Screenshot of the Microsoft website; part of John Kavanagh's selected project work.

  3. Nando’s

    Senior software engineer on the UK and Ireland replatform, migrating Nando’s customer‑facing websites from legacy Drupal to a unified headless platform built with Next.js and Storyblok, with a focus on performance, accessibility, and SEO.

    Screenshot of the Nando’s website; part of John Kavanagh's selected project work.

  4. John Lewis
    & Partners

    Senior developer as part of team 'Findability'. Led the digital implementation of the 'John Lewis & Partners' rebrand alongside new feature development, user journey optimisation, and performance improvements.

    Screenshot of the John Lewis website; part of John Kavanagh's selected project work.

  5. The World Economic
    Forum

    Senior JavaScript developer heavily involved in delivering a React‑based rebuild of the World Economic Forum online platforms, including leading the introduction of new user features.

    Screenshot of The World Economic Forum website; part of John Kavanagh's selected project work.

  6. Selfridges

    Lead front‑end developer within the e‑commerce Customer Experience team. Leading the delivery of new features, as well as considerable refactoring and improvement of the existing platform's performance.

    Screenshot of the Selfridges website; part of John Kavanagh's selected project work.

  7. Polestar

    Senior developer working on this highly animated, interactive website and automotive configurators for Polestar, once Volvo's fledgling go‑faster brand, now turned EV company. Built with Gatsby, React, and TypeScript.

    Screenshot of the Polestar website; part of John Kavanagh's selected project work.

  8. Boohoo
    Group

    The migration of several individual Group brand e‑commerce websites onto a newly developed, unified, React‑based platform. Enabling shared functionality and customisable components.

    Screenshot of the Boohoo Group website; part of John Kavanagh's selected project work.

  9. Lotus
    Cars

    Long‑running front‑end development for Lotus Cars, supporting its WordPress website, vehicle configurators, model pages, pre‑owned sales, and dealership tools.

    Screenshot of the Lotus website; part of John Kavanagh's selected project work.

  10. IMG
    Licensing

    An all‑new identity and website. Making careful use of their extensive library of client imagery, this was a ground‑up build using Gatsby, Contentful, and Netlify for this world‑leading licensing company.

    Screenshot of the IMG Licensing website; part of John Kavanagh's selected project work.

  11. Wreel
    Agency

    Gatsby, React, TypeScript, GraphQL, and Contentful development for Wreel Agency's animated, content‑managed website, interactive creative portfolio, and long‑running brand evolution.

    Screenshot of the Wreel Agency website; part of John Kavanagh's selected project work.

  12. LEGO

    Senior developer producing an all‑new e‑commerce platform with React. Designed to handle high traffic volumes and support multi‑language and multiple currencies.

    Screenshot of the LEGO website; part of John Kavanagh's selected project work.

  13. Plex.tv

    A complex React front‑end development for Plex's media library and player, improving browser access to personal video, audio, and image collections.

    Screenshot of the Plex.tv website; part of John Kavanagh's selected project work.

  14. Condé Nast
    Style.com

    Senior front‑end development for Condé Nast's Style.com, a fashion and technology‑led e‑commerce marketplace integrating editorial content and vendor stock systems.

    Screenshot of the Style.com website; part of John Kavanagh's selected project work.

  15. HSBC Corporate
    Banking

    Lead UI development for a set of HSBC digital transformation projects, including a React, TypeScript, Node.js, and AEM rebuild of commercial banking applications.

    Screenshot of the HSBC Corporate Banking website; part of John Kavanagh's selected project work.

  16. MOSCOT
    Eyewear

    Senior front‑end development for MOSCOT's WordPress to Shopify replatform, producing Liquid, Sass, and Node.js templates for its eyewear e‑commerce website.

    Screenshot of the MOSCOT Eyewear website; part of John Kavanagh's selected project work.

  17. BBC
    Future Media

    The sole UI developer for the award‑winning fourth major version of the British Broadcasting Corporation homepage and the first step in a thorough new online identity and look and feel.

    Screenshot of the BBC Future Media website; part of John Kavanagh's selected project work.

  18. Red
    Central

    Gatsby, TypeScript, GraphQL, and Contentful development for Red Central's media‑led creative studio website, delivered as the sole developer.

    Screenshot of the Red Central website; part of John Kavanagh's selected project work.

  19. Tony's
    Chocolonely

    Front‑end development for Tony's Chocolonely's colourful custom website and Chocoshop rebuild, using a standalone Node.js workflow to produce animated templates for integration into Laravel.

    Screenshot of the Tony's Chocolonely website; part of John Kavanagh's selected project work.

  20. Bose

    Front‑end development for Bose's accessible Product Support platform, using Mustache, AEM, Khoros, and Storybook to support manuals, guides, troubleshooting, and community content.

    Screenshot of the Bose Product Support website; part of John Kavanagh's selected project work.

  21. ToyBoxX

    Gatsby, React, TypeScript, GraphQL, and Contentful development for ToyBoxX's animated, multi‑layered recording studio website, with parallax, glitch effects, and CMS‑managed content.

    Screenshot of the ToyBoxX website; part of John Kavanagh's selected project work.

  22. Navico

    Principal UI development for Navico's multi‑site, multilingual e‑commerce platform, using Node.js, Handlebars, Sass, Razor templates, and Episerver across three marine brands.

    Screenshot of the Navico website; part of John Kavanagh's selected project work.

  23. Linkudo

    Sole full‑stack development of Linkudo, rebuilding a classic Flash word association game as a mobile‑first Next.js product with puzzle generation, APIs, caching, and share‑card automation.

    Screenshot of the Linkudo website; part of John Kavanagh's selected project work.

  24. Dataffirm

    Front‑end development for Dataffirm's complex real‑time Angular fintech platform, using machine learning and big data to surface investment signals.

    Screenshot of the Dataffirm website; part of John Kavanagh's selected project work.

  25. Cox & Kings
    Travel

    Responsive front‑end template system for Cox & Kings' luxury travel e‑commerce website, delivered as 70+ components and 30 HTML templates for integration into an existing legacy platform.

    Screenshot of the Cox & Kings website; part of John Kavanagh's selected project work.

  26. Macmillan Education

    Senior front‑end development for Macmillan Education's Open Mind platform, turning book‑based learning into interactive QTI and Polymer web components.

    Screenshot of the Macmillan Education website; part of John Kavanagh's selected project work.