Three rounds. Very detailed technical questions to discern technical acumen. Each interview had someone technical and someone not as technical on it. The non-technical person mainly responded to questions at the end of each interview dealing with negotiations.
One thing they asked was about distributed systems.
The following metrics were computed from 1 interview experience for the AT&T Big Data Engineer role in Dallas, Texas.
AT&T's interview process for their Big Data Engineer roles in Dallas, Texas is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for AT&T's Big Data Engineer interview process in Dallas, Texas.