Next.js specialists
Next.js App Router introduces server component paradigms that require deep understanding of caching layers, streaming, and client-server boundaries.
Audit server vs client component splits, fetch cache tags, and dynamic rendering flags.
Eliminate SSR hydration mismatches, browser API leaks, and server action timeouts.
Optimize font loading, image sizes, and bundle splits to achieve 90+ Lighthouse score.
Next.js caches aggressively at several layers, and the majority of confusing behaviour — stale data, changes that do not appear, differences between local and production — comes from one of those layers rather than from the code being wrong.
The diagnostic question is which layer: the fetch cache, the full route cache, the router cache in the browser, or a CDN in front of everything. They fail in similar ways and are fixed differently.
The error text is famously unhelpful, but the underlying reasons are few.
The second large category is work placed on the wrong side of the boundary: a component marked as client-side pulling in server-only code, or a server component being handed something that cannot cross the boundary.
These usually appear as build failures rather than runtime ones, which is fortunate. The fix is normally moving the boundary rather than adding directives until the error goes away.
Slow pages are more often slow queries than slow rendering. Before optimising bundles or images, find out how long the data fetching takes, because that is frequently the whole number.
When it genuinely is the frontend, the wins are almost always the same three: fonts, images, and a large dependency that could be loaded on demand.
Yes. An emergency Next.js engineer can help you immediately roll back the broken deployment, inspect build and runtime function logs, fix SSR/hydration crashes, and safely restore the production release.
Almost always caching. Local development disables most of the caching layers that production enables, so stale data and missing updates appear only once deployed.
Rarely. Most App Router problems are configuration and boundary issues rather than framework defects, and upgrading mid-incident adds risk without addressing the cause.
