Amazon SDE-2 — an offer after years of trying

## Background
This offer didn't come easily — years of trying and more than three rejections, each with its own cooling-off period before I felt ready to try again. Eventually a recruiter reached out on **LinkedIn** about an SDE-2 opening.

## Online assessment
Three parts: a DSA coding section, a system design case study, and a behavioural component.

## Round-by-round

### Round 1 — DSA
Graph problems requiring both **BFS** and **Dijkstra's algorithm**.

### Round 2 — Low-level design
Class diagrams and applying the relevant design patterns.

### Round 3 — High-level design
Functional and non-functional requirements, choosing an appropriate database, and operational excellence considerations.

### Round 4 — Bar Raiser
The most demanding round: a deep dive into problem solving that tested fundamentals including **binary search** and **topological sort**.

## Verdict
**Selected.**