I started with a small personal web-project on WordPress, gradually learning new technology and gaining experience.
Each subsequent project was larger than the previous one, at least a two year for a project. Often I am a full-stack, so I increase all the skills, if possible, evenly.
Was engaged in code refactoring and development for medium-loaded projects (1500-3000 unique visitors/day). Optimization of the back (database queries, PHP multithreading via system calls) and front (working with the Chrome console, implementing Vue (+ vuex), service workers, local storage)
Engaged in integration with accounting systems (xml/json exchange) and online trading platforms (Facebook, Yandex, Google)
I am familiar with SEO, I set up statistics and analytics, I tried targeting, but I was not interested.