Core Web Vitals & WordPress Speed Optimization

Summary

Root-cause speed work for WordPress sites failing PageSpeed Insights — from WPMU DEV Expert Services engagements where a generic checklist was not enough.

Challenge

Most slow WordPress sites do not have one problem. They have a stack of them: a heavy LCP element, render-blocking CSS, delayed or bloated JavaScript, cache rules fighting the CDN, and plugin or theme conflicts hiding underneath. Installing another optimization plugin usually makes it worse.

Solution

Each engagement started with diagnosis, not settings:

• PageSpeed Insights and Core Web Vitals analysis, backed by waterfall inspection
• LCP root-cause work: the actual element, its loading path and what blocks it
• Critical CSS generation and asset optimization tuned to the real theme
• Delay and defer decisions for JavaScript, checked against interactive features
• Page cache, object cache and CDN behaviour verified as one system
• Plugin, theme, hosting and third-party causes separated before any change

Depending on the root cause, delivery was either a precise configuration change or a targeted code patch — including temporary MU-plugin protection for affected sites while a permanent fix was prepared.

Result

Fixes based on an identified root cause and verified after delivery, with the reasoning documented for the site owner — not a random bundle of optimization toggles.

Stack

WordPress, PageSpeed Insights, Core Web Vitals, Hummingbird, caching, CDN

Production Bug Fixes for WordPress Plugins Used at Scale

Summary

Five years of shipping reviewed, production-safe bug fixes for commercial WordPress plugins at WPMU DEV — including SmartCrawl, Forminator, Hustle Pro, Smush, Shipper and Beehive.

Challenge

Bugs in plugins installed on real customer sites are rarely simple. A defect can come from the plugin, the theme, hosting, cache layers or a third-party integration — and a careless fix can break thousands of sites on the next update. Every change has to be diagnosed properly, reviewed and safe to release.

Solution

Working inside established Git and pull-request review workflows, and following WordPress Coding Standards, I delivered targeted fixes such as:

• Sitemap index pagination corrections in SmartCrawl
• Gutenberg link-popover compatibility fixes
• Conditional SEO interface behaviour, shown only when relevant
• Clean, non-fatal error handling for invalid third-party API credentials
• Compatibility and defect fixes across PHP, WordPress REST APIs and Gutenberg interfaces

For escalated cases, I separated plugin behaviour from theme, hosting, cache and third-party causes, protected affected sites with temporary MU-plugin patches, and handed product developers root-cause reports they could act on immediately.

Result

Maintainable, reviewed changes shipped to production plugins — fixed at the root cause, not patched over, and documented so the team could support them long-term.

Stack

PHP 7.4–8.x, WordPress, Gutenberg, REST API, Git, PHPCS

Email Shield — Multisite Email Governance Plugin for a SaaS Platform

Summary

A network-level custom plugin that gives a WordPress multisite SaaS platform full control over outgoing email, sender reputation and risky tenants — built for Amazon SES and SNS.

Challenge

On a multisite SaaS platform, every subsite sends email through a shared infrastructure. One tenant sending bad mail can damage sender reputation for everyone. The platform needed per-site control, trial-aware limits and an automatic response when bounce or complaint rates became dangerous — without giving network admins manual work for every incident.

Solution

I designed and built Email Shield as a network-activated custom plugin:

• Classifies marketing and system email through the pre_wp_mail filter before anything is sent
• Applies per-site and trial-aware sending limits across the network
• Suspends risky tenants automatically when reputation thresholds are crossed
• Processes authorized Amazon SNS bounce and complaint events through a secured REST API endpoint
• Includes SES tenant provisioning and FluentCRM sender controls
• Gives super admins a network dashboard and weekly reputation reports
• Stores its data with WordPress options and object cache — no custom database tables
• Uninstalls cleanly, leaving no orphaned data behind

Result

Delivered as a production release with full technical documentation, a CHANGELOG and a staging test plan, then promoted to production after member validation on staging.

Deliverables

Custom plugin, REST webhook endpoint, network admin dashboard, weekly reporting, documentation, staging test plan and clean uninstall routine.

Stack

WordPress Multisite, PHP, REST API, Amazon SES, Amazon SNS, FluentCRM