Service pillar
Core Web Vitals audit
One-shot deliverable, EU jurisdiction, B2B contracts.
Pricing is individual. I reply within one working day.
- 28-day CrUXfield data baseline
- LCP, INP, CLSper template attribution
- Effort-pricedfix list with estimates
- 14-day windowfrom kickoff to report
What I ship
A written report with field-data baselines per template family, lab profiling for the slowest five templates, an attributed fix list with effort estimates, and a verification protocol. Plus a 60-minute walkthrough so your team can act on it without me.
Why a separate audit, not just optimisation
Most WordPress performance work conflates diagnosis with implementation. The diagnosis becomes whatever the implementer was going to do anyway. Buyers who already have an in-house team, or who want a defensible second opinion, need the audit decoupled. That is what this engagement is.
Who this is for
- WordPress and WooCommerce sites with field-data regressions visible in Search Console
- Headless WordPress front ends on Astro or Next.js that pass lab tests but fail CrUX
- Multi-site networks where one template family is dragging the property average
- Procurement contexts where a third-party audit is required before the fix budget is approved
Engagement model
Senior B2B contracts on EU jurisdiction. Two-week window from kickoff to report. Pricing is individual. Implementation can follow as a separate engagement.
Frequently asked questions
How is this different from your speed optimisation service?
Speed optimisation is implementation; this audit is the diagnosis. You get a prioritised fix list with effort estimates that you can hand to your own team or to mine. If you want me to also implement, that becomes a separate engagement scoped from the audit findings.
Do you measure field data or lab data?
Both. Field data from CrUX is what Google ranks on, and what your real users experience. Lab data from Lighthouse and WebPageTest is what lets us attribute a regression to a specific element or script. The audit always reconciles the two.
Which Core Web Vitals do you cover?
All three: Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. INP became a Core Web Vital in March 2024 and is now the metric that fails most WordPress sites that previously passed under FID. I treat INP as first-class.
What does a deliverable look like?
A written report with field-data baselines per template, lab profiling for the slowest five templates, an attributed fix list with effort estimates, and a verification protocol. Plus a 60-minute walkthrough for your team. Pricing is individual.
Will the fixes also help my AI search visibility?
Indirectly. Core Web Vitals is a real ranking signal in Google web search and a quality proxy that AI answer engines also weigh. A site with passing CrUX gets crawled more often and renders cleaner snippets, which compounds with the GEO and LLMO work I do separately.
Explore other WordPress services and knowledge base
Strengthen your business with professional technical support in key areas of the WordPress ecosystem.
Audit, hardening, and incident risk reduction.
NIS2 and DORA scope mapping, supplier register, incident runbook.
Stability, updates, and post-launch support.
Custom WordPress engineering and architecture.
Core Web Vitals, caching, and faster delivery.
Migration to Astro, Next.js, and headless WordPress.
Related categories
Supporting articles
A comprehensive WordPress security hardening guide for 2026 covering server configuration, authentication with Passkeys, WAF setup, CSP headers, database protection, headless security, and a 25-point audit checklist.
Passkeys, read-only runtime, edge WAF versus Wordfence, CSP nonces, supply chain, and logging for WordPress. Hardening is operations, not a plugin list.
Still using "admin"? You are being hacked right now. The definitive guide to securing WordPress authentication: 2FA, Passkeys, Fail2Ban, Cloudflare Turnstile, login monitoring, and incident response procedures.
Cluster reading
Method and case work
- Achieving 100/100 Core Web Vitals: 2026 guide
- Core Web Vitals 100/100 case study (2026)
- Interaction to Next Paint optimisation guide (2026)
Specific failure modes
Adjacent services
- Speed optimisation (implementation)
- Headless WordPress (architectural change)
- Cloudflare edge deployment
Reference
Recommendations and reviews of working with WPPoland
Selected recommendations from WordPress, WordCamp and e-commerce leaders - with a focus on delivery on time, technical depth, and a business-driven approach to WordPress development.
Karolina Czapla
Marketing Strategist, Performance & Digital Strategy
“Working with Mariusz on WordCamp has shown me how rare it is to combine deep technical skill with genuine leadership. He plans, coordinates and delivers with precision, while giving the team space to grow and contribute....”
Co‑organiser, WordCamp Gdynia 2024 & 2025
Anna Kamińska
Talent Acquisition Specialist / HR People Partner
“Mariusz's portfolio speaks for itself. It reflects his precision, versatility and sense of responsibility. You can trust him to guide a project from idea to delivery, keep stakeholders informed and make sure things are d...”
Worked on the same team
Sarah‑Luisa Kwolek
IT Project Management & Product Owner, Web/App
“For over two years I could always rely on Mariusz to handle WordPress tasks calmly and professionally, from styling and templating to third‑party integrations. He brings steadiness to the team and keeps the frontend side...”
Mariusz was her client for WordPress work
Argert Boja
Senior Full‑Stack Developer
“Mariusz is the teammate everyone hopes for: strong full‑stack WordPress skills, clear explanations and a positive attitude even under pressure. He moves easily between custom plugins, performance work and Gutenberg layou...”
Worked alongside Mariusz on WordPress projects
Varun Patil
Growth & CRM Lead
“Beyond development, Mariusz understands SEO, analytics and growth. He talks directly with stakeholders, asks the right questions and ships solutions that move business metrics, from AMP to tracking to performance.”
Managed Mariusz on growth initiatives
Rafał Osiński
Founder @ EasyTrips.pl, Senior WordPress Dev
“I've known Mariusz through the WordPress community for many years. He's reliable, deeply involved and consistently shows up, at meetups, WordCamps and in projects. If you care about long‑term collaboration and someone wh...”
WordPress community co‑organiser
Daniel Blossfeld
Process Optimization & Digitalization Consultant
“I had the pleasure of working with Mariusz for almost three years. During that time, his WordPress development skills proved invaluable across a range of projects, from website builds to online member areas and even Shop...”
Mariusz was his client for WordPress work
Natalie Wiszczor
CRM & E-Mail Marketing Manager
“I had the great pleasure of working with Mariusz for over 4 years in the technical field. During this time, he proved to be a competent and reliable colleague. What stood out in particular was his friendly nature and his...”
Worked with Mariusz on different teams
Mark Chalklen
Head of Design & Build at Itineris Limited
“Mariusz is a great member of the team, always happy to get stuck into any task and happy to learn new things. A great communicator and all round nice guy to work with. Hard to beat on our weekly Strava leader board thoug...”
Managed Mariusz directly
Jessica Di Pasquale
Leading SEO initiatives with data-driven growth strategies.
“Mariusz is a very skilled, patient and expert guy. Always ready to help and to fix errors, I really appreciated working with him. He is such a great colleague!”
Managed Mariusz directly
Biki John
Content Marketing Aficionado & SEO Enthusiast
“It was great to work with Mariusz. I really appreciated his extensive knowledge of WordPress and how that came in handy whenever I needed support navigating the CMS. I commend Mariusz totally for his patience, good natur...”
Worked with Mariusz on different teams
Rafal Borowiec
Software Developer, Consultant, Manager and Lecturer
“I had an opportunity to work with Mariusz for 7 months. He excels in technical optimization for search engines (SEO). Mariusz has also strong expertise in AMP development, GTM, and GA. Mariusz feels very comfortable with...”
Managed Mariusz directly
Belinda Koch
Web-Tracking Analyst at TUI
“Mariusz is a great person to work with. He is extremely motivated to learn new things and share his knowledge, and is very knowledgeable on a wide range of topics. We worked together on digital analytics and tracking top...”
Worked with Mariusz on digital analytics and tracking topics
Ali Nezamolmaleki
Growth, SEO, Analytical thinking, AMP
“Mariusz is an extremely talented person in his field of work. He is always capable of giving a new perspective to solve problems and to think out of the box in situations where everything seems to be locked. Working with...”
Worked with Mariusz on the same team
Karol Jakubcewicz
Front-end / JavaScript Developer
“Mariusz is an incredibly experienced WordPress developer and SEO/SEM specialist I've had the pleasure to work with for almost two years. As a pilot of the team responsible for AirHelp's website development, he's been one...”
Worked with Mariusz on the same team
Paweł Lewczuk
Front-end developer, WordPress developer
“I collaborated with Mariusz on several projects and our cooperation was always exemplary. I believe there are many more joint projects ahead of us. Highly recommended!”
Mariusz was Paweł's client
Przemek Wroblewski
Software Developer with 20+ years of experience
“I found Mariusz as someone with great expertise and profound knowledge of frontend solutions. Powerful, knowledgeable and accountable WordPress developer. Has an easiness to build interpersonal relations with others. He ...”
Worked with Mariusz on different teams
Get the audit, not the sales pitch
Tell me the URL and the template families that worry you. I reply within one working day.
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