Senior Software Engineer & Technical Lead

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

I'm John, an awardwinning independent software engineering specialist based in sunny rainy 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:

More about me

Featured Projects

  1. Featured Project

    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 development portfolio.
  2. Featured Project

    Lotus
    Cars

    The automotive ecommerce website, configurator, and online marketing channels for the muchloved British sports car manufacturer: Lotus. Built on top of WordPress with HTML5, CSS and JavaScript.

    Screenshot of the Lotus website; part of John Kavanagh's development portfolio.
  3. Featured Project

    LEGO

    Senior developer producing an allnew ecommerce platform with React. Designed to handle high traffic volumes and support multilanguage and multiple currencies.

    Screenshot of the LEGO website; part of John Kavanagh's development portfolio.
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Previous Clients

Availability

I am currently leading a new digital transformation engagement. I have limited availability for selected consulting and engineering delivery from September 2026.

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Untangling a delivery problem?

Send the symptoms, constraints, and affected routes. I'll help identify whether the issue sits in the application, platform, content model, deployment path, or search surface.