System Design Engineer Roadmap¶
Overview¶
System design interviews and senior IC work both reward the same skill: mapping requirements to components, trade-offs, and failure modes. This path builds from first principles to distributed patterns.
Why This Exists¶
Without a sequence, it is easy to memorize diagrams without understanding why load balancers, caches, queues, or shards appear. The roadmap ties each idea to problems it solves.
How It Works¶
- Clarify requirements — Functional needs, scale, latency, and consistency expectations.
- High-level architecture — Clients, APIs, data stores, and async processing.
- Deep dives — Scaling reads and writes, messaging, and operational concerns.
Suggested sequence¶
| Phase | Focus | Start here |
|---|---|---|
| 1 | Foundations | Fundamentals, Scalability |
| 2 | Traffic & speed | Load balancers, Caching |
| 3 | Data at scale | Database scaling |
| 4 | Async & distribution | Message queues, Distributed systems |
| Bridge | Networking context | Load balancing (networking), CDN |
Interview pattern
For every box you draw, be ready to name a failure mode (e.g., cache stampede, split brain, hot partitions) and a mitigation.