Nielsen Software Engineer interview questions

Very easy interview process. We were told to come up with Appointment Scheduler API that will basically perform CRUD operations. I had 5 rounds (1 Coding, 1 System Design, 1 Infrastructure Architect, 2 Behavioral) all went well and i was told during the interview itself that i did very well. I turned down the offer as they were trying to low ball me with salary and i know that what i estimated was fair enough as they are still doing manual deployment till this date, they don't have any CICD process, neither do they have appropriate automation. I was bit disappointment that i laid out my salary expectation before the interview and yet they would come up with very low offer. Usually this is what happens when they have 200+ candidates in pipeline waiting to accept the low salary. Sorry Nielsen not my cup of tea !