The interview process involves three stages:

• A timed take-home assessment on HackerRank.
• A remote "onsite" that consists of four stages:
  • A "bar raiser" round to assess your situational awareness and behavioral responses.
  • Technical talks with someone in the team.
  • A systems design round.
  • A pair programming session.

There was a considerable wait between the first and second rounds. However, after that, my recruiter was super responsive, provided amazing prep guides, and delivered a final decision less than a week after the "onsite" interviews.

Study systems design.

Study the core values of Twilio Magic.

Rest is standard tech-onsite prep.