The deceased Captain, 58yo Marat Muratbaev, is apparently very experienced, having flown over 20,000 hours since 1982. At least that's what Sputnik reports, for what that's worth (see link below, in Russian).
If Sputnik is correct, it makes me wonder, why was Muratbaev flying for a new-ish LLC? Does Kazakhstan have a glut of experienced pilots and not enough seats for them? Does he have issues on his record? Other reasons?
ru (dit) sputniknews (dit) kz/society/20191228/12403390/pogibshy-komandir-samolet-almaty (dit aitch tee em el)
Per the Sputnik link below (in Russian), the 54yo FO Mirzhan Muldakulov has over 11,500 hours, over 4,000 of which on the Fokker 100.
That's pushing 32,000 hours for the pair of 50-something pilots.
Ru (dit) sputniknews (dit) kz/society/20191228/12408518/vyzhivshiy-pilot-samolet-bek-air-strazha (dit aitch tee em el)