The interview process included:

• A short phone screen with the recruiter.
• A technical phone interview with an engineer.
• Three one-hour interviews with three additional engineers.

The recruiter conducted a couple of "prep" interviews to inform me about what to expect. I received a rejection two days later, so they move quickly.

The technical phone screen consisted of generic programming questions, such as:

• What is a closure?
• What is an abstract class?
• When would you use an interface?
• When would you use a state management framework like Redux?

He also asked generic questions about my background.

Return an array of all palindrome permutations of a given string.

Given a binary tree "main" and another binary tree "sub," determine if "sub" is a sub-tree of "main."

Write a JS function to fade out an alert. How would you hide that alert on future page loads?

Various JavaScript trivia questions:

• Understand how the event loop works.
• "What order will these console.log statements print?"
• Understand how objects are assigned/copied.
• "If a = {c: 1}, and b = a, what will a == b evaluate to?"
• "If an object is copied using the spread operator, and one of the values is an object, how is that copied?"
• Convert a time stamp difference into a human-readable format (e.g., "now," "a few seconds ago," "a few days ago").