Technical Diagnostic
A focused review of affected routes, templates, deployment behaviour, crawl signals, CMS behaviour, performance bottlenecks, or code paths, followed by a prioritised fix plan the team can take into delivery.
When an issue only shows up in build or production on Vercel, the cost is usually failed releases, stale content, or broken live behaviour.
Debug Vercel production issues where builds, deployments, revalidation, auth, or environment differences are blocking releases and weakening production confidence for delivery teams.
Vercel issues become release problems when the app works locally but builds, deployments, revalidation, auth, images, caching, or production runtime behaviour are no longer predictable. The fault line may sit in the app, the build, environment variables, routing, or deployment setup. A dependable fix traces that boundary, separates Next.js code problems from platform configuration, and makes releases predictable again.
Delivery leaders usually need this when builds, deployments, environment differences, or production‑only behaviour are blocking safe shipping. I focus on restoring release confidence and live‑site stability.
Choose the production issue type that best matches the current failure.
I trace the failing build or deployment through environment configuration, logs, runtime behaviour, cache and revalidation paths, auth or API dependencies, and the differences between local and production.
A focused review of affected routes, templates, deployment behaviour, crawl signals, CMS behaviour, performance bottlenecks, or code paths, followed by a prioritised fix plan the team can take into delivery.
A short, concentrated engagement for a defined technical SEO, performance, CMS, Vercel, migration, or production issue where the business needs the cause isolated and the first fixes moved quickly.
Senior hands‑on support inside an existing team where architecture, implementation, review, and delivery judgement all matter, especially when the work cannot be handed over as isolated tickets.
Stabilise failing Next.js builds on Vercel before deployment failures start blocking releases, obscuring root causes, and slowing critical delivery work.
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.
Fix builds that take forever, time out, or run out of memory before route growth or data fan‑out turns deployment into a delivery bottleneck.
Fix content not updating and stale pages before ISR or revalidation problems make live freshness unpredictable for teams and users.
Stabilise NextAuth when authentication is broken in production and callback, middleware, cookie, or redirect issues start blocking real user access.
Engineering‑led SEO work for JavaScript sites where rendering, crawlability, metadata, or migration changes are keeping important pages out of search.
Headless CMS architecture advice for decisions around preview trust, SEO controls, revalidation, and editorial workflow before they become operational pain.
Senior Next.js architecture work for legacy platforms, difficult migrations, and live stacks that need clearer delivery direction before more work piles on.
Performance work for modern front ends where page loads feel slow, Core Web Vitals are slipping, or scripting cost is hurting key user journeys.
Fix window is not defined in Gatsby or Next.js by understanding SSR, guarding browser globals, lifecycle timing, dynamic imports, and third‑party modules.

When you set up a custom domain in Vercel, the default `vercel.app` subdomain still serves your site, which can lead to duplicate content. Here's how to fix it.

A practical guide to implementing authentication in Next.js with NextAuth.js, including sessions, callbacks, route protection, and router‑specific trade‑offs.

Middleware in Next.js provides a straightforward way to protect routes and manage user authentication. Here, I show how to implement effective route protection.