Web performance expert consultant
Turn milliseconds into millions
Your visitors deserve a flawless experience. By optimizing your website's performance, you improve your SEO, conversion rates, and user experience. I am the accelerator of your digital success.
Trusted by leading brands
Overall score
Google PageSpeed Insights
Poor
Optimizations across dozens of technologies
What my clients say about my services
Excellent work.
Paul has significantly improved the site's speed and perfectly aligned it with Google's recommendations.
Professional, thorough, and efficient, I highly recommend.
Nicolas - April Moto
Digital & E-commerce Director
We are very satisfied with Paul's work. He is quick, available, and particularly effective. Since his arrival, very good results have been observed, both in terms of performance and responsiveness. A real asset for our team.
Léo - Luxury brand
E-commerce Product Owner
I don't know if we've said it enough.
But if you want to improve your loading speed,
Make Google happy and get your Core Web Vitals in the green,
Contact Paul Delcloy.
Florian Darroman - Les Makers
Co-founder
A dedicated expert for your website performance
Over 8 years of web optimization experience. Audit, optimization and monitoring: a comprehensive approach for measurable results.
A complete technical audit
Every engagement starts with a thorough diagnosis. Core Web Vitals analysis, network waterfall, bottleneck identification – for an impact-prioritized action plan.
- ✓ Core Web Vitals analysis (LCP, INP, CLS)
- ✓ Network waterfall and bottleneck identification
- ✓ Action plan prioritized by impact and effort
Optimization Checklist
Actions identified during the audit
applied
Hands-on optimization
I don't just recommend: I implement. Page weight reduction, Critical Rendering Path optimization, elimination of render-blocking resources – every millisecond gained translates into better conversion rates and SEO rankings. I work directly in your codebase, across all layers: front-end, back-end, infrastructure.
- ✓ JavaScript and CSS bundle reduction
- ✓ Image optimization and modern formats
- ✓ Cache and CDN strategy
Every intervention is documented and measured. You track your metrics in real time, with before/after data on each optimization.
Measurable and lasting results
The goal isn't a one-time Lighthouse score, but real, lasting performance measured on your actual users via CrUX data.
- ✓ Green Core Web Vitals on all pages
- ✓ Better SEO rankings and optimized crawl budget
- ✓ Higher conversion rates, lower bounce rates
Core Web Vitals
LCP
Good
INP
Good
CLS
Good
Latest articles
Discover how a specialist optimizes your applications' speed to improve conversion and productivity.
Improve the Largest Contentful Paint with image optimization tips, critical CSS and JS, and effective server strategies.
Speculation Rules allow the browser to preload pages before the click. Feedback on Rayban and CHANEL with measured LCP gains.
Hiring a web performance expert or agency
Web performance is a discipline in its own right. Whether you're looking for an expert or a web performance agency, the key is working with a specialist who deeply masters the subject.
Revenue Impact Calculator
Estimate your monthly gain after web performance optimization
Current revenue / month
$0Revenue after optimization
$0+0.5% conversion
Estimated gain / month
$0Source: WPO Stats ↗ — Correlation studies between web performance and conversion rates
For over 8 years, I've been helping companies of all sizes optimize their web performance. Whether you need an expert or a web performance agency, the choice depends on your context – but technical expertise remains the key factor. Learn how to choose the right partner for your optimization projects.
Frequently Asked Questions
What is web performance?
Web performance (or WPO) is the art of providing fast display and good fluidity of web pages in browsers. During their loading and throughout their use, the pages of the website must load following a set of precise best practices. For a complete definition, check out the web performance definition.
Why call on a web performance expert?
Web performance is a new and complex field in web development. Profiles of web performance consultants are rare in the market and possess a comprehensive skill set in communication, UX, front-end and back-end development to best integrate into your technical teams.
Your teams certainly do not have the time to conduct web performance audits of your site or to test the speed of its pages. That’s why it is beneficial to delegate this essential part of your site's conversion (which contributes to SEO ranking) to a web performance agency or an expert in the field.
Who is web performance for?
Web performance speaks to both the bots and the users of your site. Google has been encouraging good performance since 2021 with its Core Web Vitals Update. From a user perspective, a fast site is one that exudes quality and can reflect the quality of your brand. Some case studies, like those from Amazon, correlate loading time with the conversion rate of their online store.
What technologies do you work with?
Originally a full-stack developer, I am capable of optimizing both front-end and back-end performance. My advantage over other performance web agencies is my mastery of tools like Dynatrace or Datadog for identifying code optimization opportunities on the server side. On the client side, I work with all types of front-end stacks (React, VueJS, Astro, HTML / CSS / JS, ...) and mobile.
How to test the performance of my website?
Multiple tools allow you to see the performance of the website. On Google PageSpeed, a bot is sent to your site, which will return a score out of 100 points. Other tools like Dareboost or GT Metrix also provide synthetic testing.
Contact me for a quick and free assessment of your performance as well as that of your competitors.
What is the price of a web performance optimization?
Depending on your needs, the size of your technical team, or the availability of your agency, I can offer you tailored support that matches your requirements and is suited to your business. The audit generally starts at €1500 excluding tax.
Ready to boost your performance?
Data 2023-2025