Web performance engineering US · UK · EU
I’m Alfred, a web performance engineer based in the Netherlands.
I investigate slow pages, make the agreed code changes, and measure the result. Start with a free check of one page from your store.
protectorguardrail.com
Multilingual industrial-products site. Built and tuned end to end.
1.7 s
Largest Contentful Paint (LCP)
In this test, the largest visible image or text block appeared after 1.7 seconds.
Lighthouse mobile test from 5 August 2026. Individual visitors may experience different results.
Read the measurement detailsThis industrial-products website is an example of my development work. The measurements below come from a mobile lab test; they do not measure sales or the experience of every visitor.
These are automated Lighthouse checks. The SEO score does not measure search rankings, and the accessibility score is not a full accessibility audit.
Run a new PageSpeed testLighthouse mobile test, measured 5 August 2026. Results can differ between runs.
Customers wait before they can see what you are selling, especially on a phone.
A tap seems to do nothing, or the page freezes while it updates.
Text, images, or buttons shift just as someone tries to read or click.
These symptoms can have different causes. The first check helps decide what to investigate.
I help store owners and small teams find and fix slow pages. The work starts with the pages and interactions your customers use.
Understand what makes your pages feel slow.
I check loading speed, responsiveness, and unexpected layout movement. These are measured by Core Web Vitals. Where Google has enough visitor data for your site, I use it alongside browser tests to investigate the cause.
I make the changes to your website.
Depending on the problem, I may resize images, reduce JavaScript work, review third-party scripts, or improve caching. I work with Vue, Nuxt, Astro, WordPress, and Shopify.
Keep track of performance after changes.
If regular checks would help, I can set up monitoring for loading speed, responsiveness, and layout stability. Visitor data shows longer-term trends; browser tests help investigate changes sooner.
Start with one page and a short email from me.
Send me a page URL and your email address. I check the available visitor data and run a browser test, then reply with the main issue I find and whether I can help.
If there is something useful to fix, I explain the proposed changes, price, and delivery before you decide to go ahead.
I make the agreed changes and compare the relevant measurements before and after. I explain what improved and any limits of the test.
I’m a web engineer based in the Netherlands. I work with Vue, Nuxt, and TypeScript, as well as Astro, WordPress, and Shopify.
My work focuses on finding why a page is slow and changing the code behind it. I use visitor data when it is available, then browser tests to investigate specific problems.
You work directly with me, from the first check to the code changes. The project above shows a site I built and tested; I’m now looking for my first three customers for this performance service.
The first check is free. Further work comes with a written scope and fixed quote.
Free
One key page
Find out whether there is a problem worth investigating.
Fixed quote after the check
First three customers for this service
One agreed change, with measurements before and after.
Custom quote
Scoped after the first check
For several performance problems or changes across different page types.
If you would like regular performance checks after the work, I can quote for those separately.
Send me a product page, collection page, or another page that feels slow. Tell me what happens and which device you are using, if you know.
Prefer email? hello@alfredwesterveld.com