Senior Software Engineer & Technical Lead

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

I'm John, an awardwinning software engineering specialist based in sunny cloudy Brighton, UK.

I am a friendly and enthusiastic senior engineer and technical leader backed by over twentythree years of handson experience.

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

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

  • helping prospective car buyers find just the right configuration for their next sports car;
  • helping develop the online identity of Volvo's emerging premium EV brand;
  • engaging businesses, politicians, academics, and world leaders to shape global agendas;
  • ... and enhancing the website of a local toyshop so that they could continue trading during lockdown.
More about me

Featured Case Studies

  1. Featured case study

    The World Economic
    Forum

    Senior JavaScript developer heavily involved in delivering a Reactbased 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.
  2. Featured case study

    Lotus
    Cars

    Longrunning legacy platform engineering for Lotus Cars across vehicle configurators, model pages, preowned sales, dealership tools and launch marketing.

    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 gofaster brand, now turned EV company. Built with Gatsby, React, and TypeScript.

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

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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Have a complex web platform issue?

Tell me what is blocked, what has changed, and what needs to be true after the fix. I'll come back with a practical next step.