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.
Performance Optimisation and Core Web Vitals for Modern Web Platforms
The usual sign is a site that feels slower after changes, harder to ship, or too expensive to keep tuning one regression at a time.
Performance work for modern front ends where page loads feel slow, Core Web Vitals are slipping, or scripting cost is hurting key user journeys.
Short Answer
The site may still work, but key pages feel slower, less stable, or harder to explain than they should. LCP, INP, and CLS problems usually come from rendering, images, scripts, fonts, data loading, layout behaviour, or third‑party code. What matters is connecting the metric to a real route, journey, or release change, then improving performance in a way the product and team can keep.
Why It Matters
For product and commercial teams, the value is less friction: I trace slow routes, heavy scripts, and unstable templates back to the choices affecting conversion, trust, and release confidence.
Where This Fits
- Core Web Vitals diagnostics across release, redesign, and migration work.
- JavaScript, image, and caching changes that improve real user performance.
- Performance reviews for live Next.js and modern front‑end stacks.
What I Look at First
I start with the affected templates and field data, then work through rendering, images, fonts, third‑party scripts, caching, data loading, deployment history, and production reproduction.
Common Engagements
- Short regression investigations after a launch or release.
- Performance audits that turn LCP, INP, CLS, and script cost into an ordered fix list.
- Hands‑on remediation for the fixes most likely to move field data.
What Usually Changes
- Routes, templates, assets, scripts, and rendering paths that create regressions are isolated.
- Lab scores, field data, and local reproduction evidence are separated so the team can focus on real bottlenecks.
- Fixes are prioritised by user impact, commercial exposure, and engineering complexity.
- The team has a defensible plan for images, scripts, caching, rendering, and release verification.
- Release confidence improves without chasing arbitrary performance scores.
How This Usually Works
Recovery Sprint
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.
Embedded Delivery Support
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.
This May Not Be the Right Fit If
- You only need a one‑off Lighthouse report and do not yet have room to change code, content, scripts, images, or release behaviour. If a real regression needs diagnosis, Next.js Core Web Vitals Regression Fix is the better starting point.
- The team needs cosmetic speed advice rather than diagnosis tied to field data, templates, and user journeys. If the pressure is mainly third‑party scripts, Third‑Party Script Performance Optimisation is the more focused route.
Related Case Studies and Project Work
More Specific Service Pages
Next.js Core Web Vitals Regression Fix
Recover lost Core Web Vitals after a release before the site feels slower and key routes start hurting conversion, crawl efficiency, or release confidence.
Next.js Hydration Mismatch Fix
Diagnose hydration mismatches before Hydration failed errors, brittle UI, and production‑only rendering bugs start compounding into release risk across user journeys.
Third‑Party Script Performance Optimisation
Reduce third‑party script cost when GTM, analytics, consent, or personalisation tooling starts dragging down performance on key journeys for real users.
Related Services
Vercel Deployment Debugging
Debug Vercel production issues where builds, deployments, revalidation, auth, or environment differences are blocking releases and weakening production confidence for delivery teams.
Technical SEO for JavaScript Applications
Engineering‑led SEO work for JavaScript sites where rendering, crawlability, metadata, or migration changes are keeping important pages out of search.
Next.js Performance and Stability
Debug live Next.js stacks that became slower, less stable, or harder to reason about after a release, redesign, dependency change, or script rollout.
Next.js Platform Consulting
Senior Next.js architecture work for legacy platforms, difficult migrations, and live stacks that need clearer delivery direction before more work piles on.
Related Technical Articles
Optimising Next.js Performance with Incremental Static Regeneration (ISR). Optimising Next.js Performance with Incremental Static Regeneration (ISR)
How ISR improves Next.js performance by mixing static speed with controlled freshness, and where it fits best over fully dynamic rendering for changing content.
Caching Strategies in React. Caching Strategies in React
React performance work is often about avoiding repeated effort. This guide looks at memoisation, browser caching, and smarter data‑fetching choices.
How to Improve Your Time to First Byte (TTFB). How to Improve Your Time to First Byte (TTFB)
Time To First Byte (TTFB) is a crucial influence on website performance. The easy answer is increasing server resources, but there are other considerations too.
HTML Video and the preload Attribute. HTML Video and the
preloadAttributeUnderstand the HTML video preload attribute, including auto, metadata, none, browser behaviour, bandwidth cost, playback expectations, and trade‑offs.
Image Optimisation with next/image. Image Optimisation with
next/image`next/image` explained with responsive sizing, lazy loading, layout shift reduction, and why image optimisation matters in real Next.js applications.
Angular Change Detection: How It Works and How to Optimise It. Angular Change Detection: How It Works and How to Optimise It
Angular change detection explained through zone triggers, OnPush, signals, template cost, manual checks, and practical rendering optimisation at scale.
