Hi there, I’m Harry. I am an independent Consultant Web Performance Engineer from Leeds, UK. I help some of the world’s largest and most respected organisations deliver faster and more reliable experiences to their customers. I am an invited Google Developer Expert, a Cloudinary Media Developer Expert, an award-winning developer, an international speaker, and co-chair of the inimitable performance.now(), the web performance conference for professionals.
With over a decade of professional experience, and eight years working as an independent consultant, I have been trusted by the likes of the United Nations, Google, the BBC, General Electric, and many more. Through combinations of workshops, training, audits, development, and consultancy, I have helped my clients to build and scale resilient, performant front-ends for a variety of applications.
There is a short list of people I whole-heartedly recommend for detailed performance work and Harry is right there at the top.Tim Kadlec
Internationally recognised as a leading expert in CSS architecture and front-end performance, it is my job to help companies accomplish the return on investment that web performance efforts can bring, whether that is increasing conversions, improving engagement, or growing revenues. I thrive on being a business-focused engineer, equally comfortable in front of C-level executives as I am in front of a room full of developers.
Most importantly, I am available for hire. My work spans many industries, countries, and formats. From troubleshooting and assessing existing performance issues, to training engineers to debug and avoid these common pitfalls in future; from advising and consulting with teams to get a handle on web performance issues, to everything else in between. If you need a faster website, we’ll get you a faster website.
If you think I can help you—and I probably can—say hello: I enjoy working with companies of all shapes, sizes, locations, problems, needs, and budgets. I’m professional, but I’m very laid back—drop me a line, and we can see what fits.
CSS Wizardry makes use of many great tools and services; tools and services that make my life as a developer much, much simpler.
The CSS is written in Sass, and built on top of inuitcss. inuitcss is a free, open-source, Sass-based, OOCSS framework with a strong focus on performance, scalability, and a small footprint. This is then built into ITCSS, a CSS architecture of mine which is designed to aid the growth and maintainability of CSS projects.
Your system font is used to give a familiar feel and to help improve performance. Responsive testing was made possible by Finch, an incredible tool for exposing local dev sites to the open internet. SpeedCurve and Treo help keep CSS Wizardry fast.
I chose the name CSS Wizardry when I was 17 years old. It’s a decision that I’m having to live with…
Hi there, I’m Harry. 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.
I am available for hire to consult, advise, and develop with passionate product teams across the globe.
I specialise in large, product-based projects where performance, scalability, and maintainability are paramount.