This was for an SDE II at AWS Cryptography.

The first interview was conducted by a recruiter. It was very pleasant and informative.

The second was a 45-minute technical phone screen by a senior developer.

The third was an hour-long technical code interview mixed with Amazon Leadership Principles, performed by a development team member.

The fourth interview was about the same.

The fifth was an hour-long system design session with the development manager. I enjoyed it.

The sixth interview was just like the third and fourth.

The recruiter called me the very next day, stating that the overall decision was that I am not ready. They offered feedback on areas where I excelled as well as areas for improvement. They also invited me to explore other roles within the organization.

Bottom line, for me, it was a very positive experience, regardless of the outcome. It's always great to receive constructive feedback.

Given the root of a binary tree, return the values of its boundary.

Determine if a 9 x 9 Sudoku board is valid.

Given a string s which represents an expression, evaluate this expression and return its value. The integer division should truncate toward zero.