Developer web is a famous job, and they are very proud because they work on a freelance account. But a developer is also someone that work hard to be aware of novelty on the net. No need to have a master degree to be a developer web, just to have a passion about it and his evolution.
To be a developer web
The process to become a PHP developer
The codes are not so far, but you can able to write them in a clever opinion to not make mistakes at all.