To note, this is generally how 2K hires for BioShock, but it's possible they're just working on something similar.
Note:
Here's a job from Irrational that's similar:
Source: http://jobs.gamasutra.com/jobs/362-...mer-2K-Marin-2K-Marin-Novato-CA-United-States2K Marin said:2K Marin, best known for developing the critically acclaimed BioShock 2 and currently working on the upcoming The Bureau: XCOM Declassified, is currently seeking a Lead Network Programmer for an unannounced project.
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Develop and maintain multiplayer systems from design to implementation.
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 One or more shipped PC or console game titles, FPS or RPG titles .
 Experience working with the Unreal Engine and specifically the unreal replication model.
Note:
Here's a job from Irrational that's similar:
Irrational said:3 or more shipped PC or console game titles, FPS or RPG titles preferred.
Experience working with the Unreal Engine.
http://irrationalgames.com/studio/careers-at-irrational/