Senior Software Development Engineer in Test (SDET) Interview Preparation Guide - Microsoft
Software Development Engineer in Test (SDET)
Microsoft
Senior
6 rounds
Updated 2/22/2026
Microsoft's interview process for Senior SDET roles typically consists of an initial recruiter screening, technical phone screen(s), and multiple onsite rounds covering test automation, system design, coding proficiency, and behavioral competencies. The process evaluates both software engineering capability and domain expertise in quality automation.
Interview Rounds
1
Recruiter Screening & Initial Conversation
45 min3 focus topicsculture fit
2
Technical Phone Screen - Test Automation & Framework Design
75 min5 focus topicstechnical
3
System Design Interview - Testing Infrastructure & Tools
75 min5 focus topicssystem design
4
Coding Round - Software Engineering Fundamentals
75 min5 focus topicstechnical
5
Behavioral & Leadership Interview
60 min5 focus topicsbehavioral
6
Domain Expert / Architecture Review Interview
60 min5 focus topicstechnical