Technical SEO

Page speed and Core Web Vitals consulting

I help teams investigate loading performance, responsiveness, and layout stability across their important pages. The work combines available field data, lab testing, and an understanding of how the website is used. I work with developers to identify the implementation changes worth testing and validate the results after release.

Freelance experience

Selected clients I have worked with

These brands are part of my freelance SEO portfolio.

The work behind the service

Look at the experience behind the performance score

A performance report is a starting point. Your team still needs to understand which resources or interactions create a problem and which users are affected. I review representative page types, devices, and target markets, then work through the relevant browser behaviour with the developers who can change it.

Scope and deliverables

What I can work on

We agree on the scope after reviewing your requirements. A project can focus on one of these areas or combine the relevant work.

Performance baseline

Review available Core Web Vitals and other field data alongside repeatable lab tests. We select representative templates and define the device and network conditions relevant to the investigation.

Loading and resource investigation

Examine image delivery, styles, scripts, and important rendering dependencies. The goal is to identify concrete implementation work rather than pass on an unprioritised list of tool suggestions.

Interaction and layout review

Investigate responsiveness and unexpected movement on the relevant pages. This can include JavaScript work, component behaviour, font loading, and other page-specific causes worth testing.

Developer support and follow-up

Prepare requirements, review proposed fixes, and compare the available measurements after implementation. Field data and lab tests are reviewed in their own context.

Working together

How the project works


  1. Choose representative pages

    We agree on the templates, devices, and user journeys to investigate.


  2. Trace the causes

    I use browser tools and the available data to identify practical changes with your team.


  3. Measure the changes

    We retest the implementation and review subsequent field data where it is available.

Experience and related work

Experience with JavaScript websites at scale

My freelance portfolio documents performance work on a JavaScript website with millions of visits, including collaboration with frontend and infrastructure teams and analysis by country and device.

More about my technical background

Before we start

Questions about this service

Can you work on React or Next.js websites?

Yes. We can investigate the relevant rendering and resource-loading behaviour with your frontend team. The exact scope depends on the application and the pages affected.

Will you guarantee a particular score?

No. The work focuses on diagnosing issues, implementing agreed changes, and measuring their effects. Results depend on the website, its dependencies, and the conditions being measured.

Do you implement all the code changes?

We agree on responsibilities at the start. I can investigate, prepare requirements, review code examples, and validate changes while your developers manage the application implementation.

Page speed and Core Web Vitals consulting

Discuss your project

Send representative URLs, the devices or markets affected, and any performance reports or recent changes your team has already investigated.

Send an enquiry Or contact me on LinkedIn