Applied online and the next day received an email requesting a technical phone screen. The phone interview was scheduled for one week later.

The interviewer seemed annoyed and terse from the beginning. While introducing himself and describing his past work, he asked me to explain how compilers work.

We then moved on to a technical question. He spelled out a tinyURL link that directed me to an online shared editor, kobra.io. He explained the problem. I asked a clarifying question and then began to jot down a note planning how I'd tackle the solution.

Almost immediately after starting to plan the solution, he warned that I should start coding or I'd spend all my time planning. I acknowledged this and began writing a trie structure in Python. He then stated that no candidates had completed a solution with a trie within the interview time and urged me to write a simpler solution. I agreed and wrote a solution that used a stack and a dictionary.

I finished the solution and found and fixed a bug where I had mistyped a variable name. I then asked if I should begin cleaning up the code and optimizing, or possibly implementing a faster solution. He indicated that wouldn't be necessary and asked if I had any questions for him. I inquired about the company culture and workflow.

The interview lasted about 45 minutes. Two days later, I received an automated email informing me that they would continue with other candidates.

Same Street Fighter question, another Glassdoor interview mentioned.

Write two functions: register and on_key.

register takes a combination of keys as a string and a name for the combo.

on_key takes a single keypress and checks if that keypress completes a registered combo.

Given possible inputs: Up, Down, Left, Right, A, and B. Registered combos can be of unlimited length.