What is the best-paying job in Russia?

All the best-paying jobs in Russia can be found under a roof, or 'krisha' (крыша) as it is called in Russian.

People who work in such jobs are very close to each other, like family. The patriach of the family is often called 'boss' (босс) or 'kryostniy otets' (крёстный отец). The boss receives most of the profits, he and his closests partners can afford armoured Mercedeses and BMWs and not to mention, plenty of expensive pets called 'flathead' bears. (See "This answer)

These companies in charge of running things under the 'krysha' are referred to as "mafiya" (мафия), as opposed to the Italian name "Mafia" with a capital "M". They, therefore, are radically different than the Sicilian Mafia. "Mafiya" is a syndicated cooporation.

After the boss and his closest cohorts, the best paid person is the 'nayomniy ubitsa' (наёмный убийца) who deals with personnel, especially with firing them. Sometimes he works independently and is hired whenever he is needed.

People living under the krisha (roof) need to pay rent. If they do not pay up on time, the nayomniy ubitsa deals with them.

Nayomniy ubitsa are also referred to in Russian as 'киллер'--derived from the English word, 'killer'.