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 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:

  • leading a team of developers for the world's local bank, rebuilding their commercial banking platform;
  • 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;
  • ... and bringing a local rock band closer to their fans online during lockdown.
More about me

Featured Case Studies

  1. Featured case study

    Nando’s

    Senior software engineer on the UK and Ireland replatform, migrating Nando’s customerfacing 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.
  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

    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.
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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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Want to find out more?

If you need senior handson support with a complex React or Next.js platform, migration, performance issue, or technical SEO problem, send me the context and I'll tell you where I can help.