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.

20 October, 2010
I hate that I love Writer
20 October, 2010
Unsung heroes
19 October, 2010
Things are changing at CSS Wizardry
13 October, 2010
Your logo is an image, not an <h1>
11 October, 2010
Hyperbolic title using the word sexy to describe some code
6 October, 2010
Good developers vs. good salespeople
5 October, 2010
Designing in the browser leads to better quality builds
4 October, 2010
In response to ‘Invisible captcha to prevent form spam’
27 September, 2010
Keeping code clean with content
16 September, 2010
A quick counter to 'The Digital Agencies of the Future!'

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.

Suffering? Fix It Fast!

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ITCSS – coming soon…

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Talk
Devoxx Greece: Athens (Greece), April 2025

Learn:

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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