I have never in my life seen a worse company who actively does their best to ensure they waste your time and have nothing to show for it.

I was reached out to almost a year ago about an SDE role. I was told there were going to be 2 interviews (technical and final). Those two turned into four with two "we're not sure if we're going to hire for this role". I went through a significant amount of stress and constant follow ups with no end in sight. For this one job alone I had to deal with multiple recruiters. Again, I have never seen such an egregious amount of effort put in to ensure my time and hopes of getting a job are wasted. Fiserv should be ashamed but I know they won't care because of this employer advantaged market right now.

The topics included database locking, multithreading, and other concepts.