Web Performance Engineering

Slow stores lose sales.
I make yours fast.

Your customers abandon slow pages. Google ranks slow sites lower. I find what’s actually slowing your e-commerce store — using real-user data — and fix it. More speed, more conversions, more revenue.

No commitment. No sales call. Just real numbers for your site.

The cost of a slow site

7%
conversion drop per 100ms of load delay
1s
slower → up to 20% fewer mobile conversions
higher bounce when LCP passes 3 seconds

Sources: Google Deloitte / Akamai conversion studies. Speed isn’t a vanity metric — it’s directly tied to how many visitors buy.

What I do

I don’t sell generic “make it faster” hand-waving. I use real-user field data, then make specific changes that move your revenue.

Core Web Vitals audit

Real-user field data from Google’s Chrome UX Report, not synthetic guesswork. I find exactly what makes your store slow for actual visitors.

Performance fixes that ship

Concrete code changes — image pipelines, render-blocking JS, third-party scripts, caching, hydration. Vue, Nuxt, Astro, WordPress, Shopify.

Ongoing monitoring

Dashboards on your real-user p75 LCP, INP and CLS. Catch regressions before they cost you revenue and rankings.

How it works

Three steps. The first one is free.

01

Free field-data audit

I pull your site’s real Google CrUX numbers and a Lighthouse pass — no commitment, no sales call. You get a plain-English report of what’s slow and why it matters.

02

Prioritized fix plan

A ranked list of changes by revenue impact, not vanity scores. You see the expected payoff before anyone writes code.

03

Ship + measure

I implement the fixes, deploy, and we watch the real-user numbers move. You keep the dashboards and the gains.

AW

About Alfred

I’m a web engineer based in the Netherlands who specializes in performance. My stack is Vue, Nuxt and TypeScript, and I’ve shipped fast sites on Astro, WordPress and Shopify.

Most agencies run a Lighthouse report and guess. I start from your store’s real Google Chrome UX data — what actual visitors experience — because that’s what affects rankings and conversions.

I work directly with store owners and small teams. No account managers, no bloated retainers. Just someone who cares about your numbers.

Core Web VitalsVue / NuxtTypeScriptAstroCrUX field data

Get your free performance audit

Tell me about your store. I’ll pull your real Core Web Vitals numbers and send back a short report — usually within one business day.

Prefer email? hello@alfredwesterveld.com