Engineering Deep Dives

Learn how to solve the rotated sorted array problem in O(log n) — including what interviewers really look for, common mistakes that cost candidates the offer, and exactly how to talk through it.

Learn how to crack the Next Permutation problem in interviews — from building the right intuition to avoiding the exact mistakes most candidates make under pressure.

Most candidates flatten everything into a heap and call it done. Here's why that costs you the offer — and what the optimal O(N log k) approach looks like.

Most candidates overthink this problem and fall into classic binary search traps. Here's the clean lower_bound/upper_bound approach that interviewers love.

A practical guide to approaching system design interviews at top tech companies. Learn the framework, key concepts, and common pitfalls.