At the first interview with the manager, she asked me about my salary expectations and she says "OK". After 2 rounds of successful extensive technical interviews, which cover knowledge of an entire data analytics department, the HR person call me and proposed me significant lower amount. I wrote an e-mail to the manager, requesting to respect our initial agreement. Result: They withdraw the offer and rejected me from the process. If the collaboration starts in this way, you can imagine how would be to work in a such toxic environment.