The Amazon SDE interview process involves multiple stages:

• An online assessment (coding + debugging + work simulation)
• A technical phone screen
• Final technical plus behavioral rounds emphasizing data structures, algorithms, and Leadership Principles.

Candidates face coding problems on topics like arrays, trees, and dynamic programming, followed by behavioral questions aligned with Amazon’s 16 leadership values (e.g., ownership, customer obsession).

Strong communication, clean coding, time-complexity analysis, and structured responses using the STAR method are key.

The entire process typically lasts 4–6 weeks, ending with a hiring committee review and offer discussion based on performance and cultural fit.

They asked me to design an efficient algorithm to find the longest substring without repeating characters, explain its time and space complexity, and then optimize it further if possible — testing both my coding and problem-solving approach.