Spider'sWeb Group consits of 5 sites and is the biggest WordPress based blog in Poland with more than 5 million users monthly. My job was to keep it working and add many new feautres for 6 years.
Marketer+ is a very popular site and magazines for entrepreneurs and marketers in Poland. My job was to keep them online and add many new features (for example an online subscription).
They specialize in medical apps. I did their homepage and some client pages - everything on WordPress of course.
I made some more interesting projects, but sadly I can't write about them. I can only say most of them were really cool.