I have accepted an offer from Amazon (SDE-1) very recently. Now I am most likely to get a very competitive offer from another company.
While I was being interviewed by the other company, I sought for an offer deadline extension from Amazon multiple times. I wasn't given one. Hence I had to accept that offer since I did not complete my final round of interviews with the other company then.
Once I get that offer officially, can I reach out to amazon regarding negotitation? Is it totally weird / unprofessional to negotitate after accepting offer? Please guide me on how should I approach this.