Consisted of five (5) interviews: one phone screen, one interview with the team software architect, two interviews with senior team members (PhD physicists), and one mostly personality interview. All fairly professional, however I was a bit taken aback by the interviews with the senior team members. They asked almost strictly theoretical questions from undergrad physics and numerical analysis -- nothing applied.

The recruiter I worked with was positively awful, however. Took over a month from date of intention to make me an offer to the first verbal offer. Written offer maybe two weeks after that.

Write down Schrodinger's equation

Write the electric potential of a point charge at radius r of an electron

Prove the time reversal property of the Fourier transform