Fidelity Investments

On-site 3-hour interview. Followed by a manager, senior developer, and architect. First round: managerial questions, then questions related to your experience and design. Last round: more technical, towards coding and how you would design the APIs.

Good process. Three rounds: normal round, whiteboard, and panel. Met five members of the team. Had multiple questions and good chats with the team. The process took almost a month but went well.

One team lead level technical round asked for basic questions and small algorithms. One architect round asked for some implementation and high-level design of an earlier project. One group HR round for HR, salary, etc. input.