Senior Software Engineer & Technical Lead

Hands‑on technical leadership across complex Next.js and React platforms, digital transformations, technical SEO, performance, migrations and platform architecture.

  1. LEGO
    LEGO

I'm John, an award‑winning software engineering specialist based in sunny cloudy 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 a major browser vendor explore AI‑driven tools for clearer, more useful browsing experiences;
  • helping develop the online identity of Volvo's emerging premium EV brand;
  • engaging businesses, politicians, academics, and world leaders to shape global agendas;
  • ... and creating a digital home and web shop for a fledgling Sussex vineyard.
More about me

Featured Case Studies

  1. Featured case study

    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. Featured case study

    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.
  3. Featured case study

    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.

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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