Senior Software Engineer & Technical Lead

Hands‑on technical leadership for digital transformation programmes, specialising in complex Next.js and React replatforming, migrations, platform architecture, performance, and technical SEO.

  1. Cox & Kings
    Cox & Kings

I'm John, an award‑winning software engineering specialist based in sunny Brighton, UK.

I am a friendly and enthusiastic senior engineer and technical leader backed by over twenty‑three years of hands‑on experience.

I help teams and clients design, build and improve websites, applications and web platforms, pairing architecture, delivery judgement and hands‑on TypeScript, React, HTML, and CSS.

My portfolio is diverse; I work with global clients, solving real-world problems, including:

  • helping develop the online identity of Volvo's emerging premium EV brand;
  • leading the headless replatforming of a much loved chain of restaurants, modernising its UK & Ireland web estate;
  • helping prospective car buyers find just the right configuration for their next sports car;
  • ... and optimising the online ordering system of Brighton's last independent milkman.
More about me

Featured Case Studies

  1. Featured case study

    Lotus
    Cars

    Long‑running legacy platform engineering for Lotus Cars across vehicle configurators, model pages, pre‑owned sales, dealership tools and launch marketing.

    Screenshot of the Lotus website; part of John Kavanagh's selected project work.
  2. Featured case study

    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.
  3. Featured case study

    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.

How I Usually Help

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Availability

I am currently leading a new digital transformation engagement, with availability for selected consulting and engineering delivery from September 2026. Short diagnostics or urgent work may be possible sooner.

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Looking for technical direction?

I support teams that need senior judgement on React, Next.js, headless CMS architecture, performance, migrations, and technical SEO.

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