Technical Lead & Senior Software Engineer

Hands‑on engineering leadership for complex digital transformation programmes. I help product and engineering teams turn fragile legacy web estates into robust platforms that are faster and easier to maintain, scale, govern, and improve.

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

I am an enthusiastic senior software engineer and technical leader with 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:

More about me

Featured Case Studies

  1. Featured case study

    IMG
    Licensing

    Long‑term technical direction and hands‑on development for IMG Licensing's digital platform, spanning its original rebuild, ongoing evolution, major redesign, and migrations to Next.js, Sanity, and Vercel.

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

    Microsoft Edge
    DevTools

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

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

    Virgin Atlantic
    & Holidays

    Lead engineer on Virgin Atlantic & Holidays' large‑scale replatforming programme, unifying twelve disparate applications within a new headless architecture built with React and Next.js.

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

Availability

I'm leading a global digital transformation, with limited availability for longer engagements until early 2027. Short‑term consultancy is still available sooner by agreement.

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Planning a platform change?

I help teams make difficult platform work clearer, from architecture decisions and migrations to launch recovery, performance, and search visibility.