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.

18 March, 2013
.net award nominee
7 February, 2013
Introducing csswizardry-grids
6 February, 2013
Responsive grid systems; a solution?
29 January, 2013
You know your context – on critical thinking and thinking for yourself
25 January, 2013
MindBEMding – getting your head ’round BEM syntax
23 January, 2013
Your logo is still an image… and so is mine!
20 January, 2013
Front-end performance for web designers and front-end developers
15 January, 2013
Discussion via Branch
21 December, 2012
A new CSS Wizardry
9 December, 2012
Open Sourceome

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!

Connect

Projects

ITCSS – coming soon…

Next Appearance

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.

Start a Conversation

.site-nav__list { content-visibility: visible; }

Audits

Consultancy

Training