Services

Vercel and Next.js Deployment Debugging

Start here when the issue only shows up in build or production on Vercel and the cost is failed releases, stale content, or broken live behaviour.

Choose the right Vercel production fix when builds, deployments, revalidation, or auth are blocking release confidence.

Common situations

  • Failing builds and unstable deployment pipelines on Vercel.
  • Time‑outs, memory pressure, and large build workloads.
  • ISR, revalidation, and production auth problems after deployment.

Choose the production issue type that best matches the current failure.

Choose the closest scenario

  2. Scenario

    Next.js Site Broke After Deploy

    Stabilise a Next.js production incident after deploy when the app works locally but the live site is now broken, inconsistent, or only failing against production conditions.

Related consulting support

  1. Capability

    Next.js Platform Consulting

    Bring in senior Next.js architecture support when a legacy platform, older front end, or hard‑to‑maintain site needs migration planning, platform rescue, and clearer delivery direction.

  3. Capability

    Headless Architecture Consulting

    Bring in headless CMS consulting when CMS architecture, SEO controls, preview trust, or revalidation decisions are about to lock in operational pain.

  4. Capability

    Technical SEO for JavaScript Applications

    Bring in engineering‑led SEO help when Google is not indexing important JavaScript pages because rendering, crawlability, metadata, or migration changes are getting in the way.

Related project experience

  1. Linkudo

    Freelance full‑stack developer for this modern reimagining of the classic browser‑based word association game. Built with Next.js, Node.js, Supabase, and Redis.

    Screenshot of the Linkudo website; part of John Kavanagh's development portfolio.

  2. Nando’s

    Senior software engineer on the UK and Ireland replatform, migrating Nando’s customer‑facing 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 development portfolio.

Related technical articles

Tell me what needs fixing

Send me the affected page or route, point me at the code if that helps, and tell me what you expected to happen versus what is happening now. If this connects to a Next.js migration, technical SEO drop, performance issue, launch, or platform move, include that context too. I'll come back with the clearest next step.

Send the details
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