Senior Software Development Engineer In Test (SDET) - FAANG-Standard Interview Preparation Guide
Software Development Engineer in Test (SDET)
Senior
7 rounds
Updated 11/23/2025
This guide is based on general FAANG interview practices and may not reflect specific company procedures.
Senior SDET interviews at FAANG companies follow a rigorous, multi-stage process designed to evaluate deep technical expertise in test automation, system design thinking for testing infrastructure, leadership capabilities, and cultural fit. The process emphasizes your ability to design scalable testing solutions, architect testing frameworks, write complex automation code, and mentor junior engineers. Expect a mix of coding challenges specific to testing scenarios, system design interviews focused on testing infrastructure, and behavioral discussions around leadership and cross-functional collaboration.
Interview Rounds
1
Recruiter Screening Call
30 min3 focus topicsbehavioral
2
Technical Phone Screen - Test Automation Fundamentals
60 min4 focus topicstechnical
3
System Design Interview - Testing Infrastructure and Framework Architecture
60 min5 focus topicssystem design
4
Advanced Technical Interview - Test Automation Development and Framework Deep Dive
60 min5 focus topicstechnical
5
Testing Tools and Infrastructure Development Round
60 min4 focus topicssystem design
6
Behavioral and Leadership Interview - Senior Engineer Principles
60 min5 focus topicsbehavioral
7
Bar Raiser Round - Hiring Manager and Leadership Principles Deep Dive
60 min5 focus topicsbehavioral
Additional Information