Before you find someone to "make a code" for you, look for some forum where you can get someone to do the harder part, which is to figure out how to hook up that 433 receiver to an Arduino.
Most projects have hardware and software, you'll need to get someone to do both for you, and maybe then someone else to combine them for you.
Do you have "google" on your internets? That might provide links to many more ppl willing to do this all for you.
Or even give you some ideas about how do it yourself.
a7