First of all, possible income depends on the studio. Alexander Blintsov from Pixonic, for example, said that one company can pay a mid developer $2400-3000, while other studios pay lead developers $1500. Also, he noted that the size of a company doesn't affect the salary. The best you can get is $4000 per month but that's a rather unique case.
Kirill Shabordin from Ambi.Games noted that programmers who want to get junior-positions need to negotiate: some can get a nice salary, while others have to work for food. As for the mid-level specialists, artists can expect $1900 and more, programmers can get $2400, while game designers get more than $2400.
King’s Bounty II
A representative of the Sperasoft team said mid-level Unreal designers can get $2200, while senior developers might expect more than $2800. As for junior specialists, an average salary is $1700.
The Russian game development market is not doing so great compared to other countries. Yes, you can get a competitive salary, but the average numbers are not so good. You can find the full story here (in Russian).