CD Projekt's multiplayer job listing is research-oriented
Platkow-Gilewski said the multiplayer programmer is part of CDP's desire to "explore all possible directions, check what would be cool, what's feasible and – always the most important for us – what suits our games the best."
In other words, the multiplayer programmer is there to help CD Projekt Red determine whether multiplayer would work in any upcoming games. We hope, for the sake of the person hired for that position, that it ends up working in at least one.