Checking the Quality of a Web Developer
It's fairly easy to judge the quality of web design but not so easy to judge how well a website is put together in terms of search engine optimisation, performance, code quality, mobile friendliness and so on.
I recommend using the free independent Nibbler test tool to gauge the quality of a web professional's work by testing their own website and other websites in their portfolio. It's easy to run a report and it only takes a few minutes.
While no test tool is perfect, the results will give you an idea of the level of competence and value for money on offer.
Examples of My Work
See below for some recent examples of my work.