Microsoft Senior SDE Loop
System design carries the most weight at senior, and it decides whether the offer lands at 63 to 64 or a level lower. Coding still needs to be strong, but a shallow design round is the usual cause of a down-level.
The Rounds
Screens
- Recruiter or Hiring Manager CallA recruiter covers logistics and motivation; some teams add a hiring manager conversation about your projects.Practice Recruiter or Hiring Manager Call
- Online Assessment or Technical ScreenA timed online assessment or a live coding screen on Teams, depending on the team.Practice Online Assessment or Technical Screen
Onsite
- CodingTwo to three rounds of harder data structures and algorithms problems, each with some behavioral questions.Practice Coding
- System DesignOne round on a large distributed system, often drawn from the team's own domain, with new constraints added as you go.Practice System Design
- Final InterviewMany loops close with a senior interviewer who reads the earlier feedback and probes any doubts.Practice Final Interview
What the Senior SDE Loop Weighs
- Reasonable assumptions in design, then a simple start that scales as bottlenecks appear.
- Each technology choice tied to the constraint that drove it.
- Depth in the team's domain, which interviewers use to set level.
- Stories about leadership, mentoring, conflict, and mistakes you learned from.
Sources
Last checked Nov 2026. Loops vary by team and change over time, so confirm the details with your recruiter.