Site-Speed Optimisation – Web Performance and Site Speed Consultant

Trusted by:

Harry gave the team a strong footing for identifying performance issues on iPlayer. With his knowledge, we were able to roll out quick fixes to our audiences without the need for big rewrites, all within just two days.
Matthew Burrows, BBC iPlayer
Harry helped our team level up their scalable CSS architecture skills, and to say that he had a large impact on our work is an understatement. We can’t recommend him enough.
Addy Osmani, Google
Harry’s workshop was excellent; we left with tons of new ideas and techniques to improve both the CSS architecture and overall performance of Behance and Adobe Portfolio.
Jackie Balzer, Adobe
There’s a short list of people I whole-heartedly recommend for detailed performance work; Harry is right up there at the top.
Tim Kadlec
The CSS architecture I learned from Harry on the NHS project has changed the way I work. Bravo!
Josh Nesbitt

Articles

There are 248 articles on this blog. Find them all on the blog page.

1 March, 2011
Problems with the sans-serif hack
22 February, 2011
Mobile business card
17 February, 2011
Creating a pure CSS dropdown menu
17 February, 2011
Pure CSS(3) accordion
9 February, 2011
CSS powered ribbons the clean way
6 February, 2011
in:focus—a case study
3 February, 2011
Announcing in:focus
31 January, 2011
Forget responsive web design…
29 January, 2011
Create a centred horizontal navigation
23 January, 2011
Link: Recreating the Luke's Beard social icons with CSS3

Hi there, I’m Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, Tweet, speak, and share code about measuring and improving site-speed. You should hire me.

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ITCSS – coming soon…

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Devoxx Greece: Athens (Greece), April 2025

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I help teams achieve class-leading web performance, providing consultancy, guidance, and hands-on expertise.

I specialise in tackling complex, large-scale projects where speed, scalability, and reliability are critical to success.

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