Short story: They said "Congratulations, you got the job!" – to quote them: "Your performance during all of the interviews was really good and we would definitely like to bring you on board." But then they changed their mind, refusing to give any reason.

Long story:

• The process started with an online coding challenge.
• Three more Skype interviews followed, with one week between each.
• After three weeks, the result came back positive (see quote above), but with no job offer.
• I asked for an offer.
• After two weeks of silence, they said they had a high workload that prevented them from sending it, but they would do so soon.
• After one week, they announced they had changed their mind, refusing to say why.
• I asked them to give a reason for this decision.
• There was no answer from them, no feedback.

All in all, the whole process took two months to practically be fooled. I would have appreciated it if they had at least explained why. How one can go from "Your performance during all of the interviews was really good and we would definitely like to bring you on board" to complete rejection is beyond my comprehension. I never thought this was possible.

Algorithms & Data Structures Problems

A System Design Question