Received an e-mail from a recruiter, looking to set up an initial phone interview for the 1st round. After the screening interview, moved on to the 2nd round, a "foundational" interview - also over the phone. Moved on to the 3rd round, for the "skills" interview - which was another phone interview. The next round would be a face-to-face interview. Most positions go through either 4 or 5 rounds of interviews.