Tutorials System Design Tutorial
Reverse Proxy Deep Dive — Complete Guide
Reverse Proxy Deep Dive — Complete Guide: free step-by-step lesson with examples, common mistakes, and interview tips — part of System Design Tutorial on Toolliyo Academy.
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System Design Tutorial · Lesson 13 of 100
Reverse Proxy Deep Dive
Basics → Scale → Interview
Basics · 1 — Building blocks · ~6 min · Module 2: Networking and Traffic Management
What is this?
A reverse proxy sits in front of origin servers — TLS, compression, request buffering, and routing — often Nginx/Envoy/Traefik.
Why should you care?
ShopNest APIs should not terminate messy internet TLS and HTTP quirks on every app process.
See it live — copy this example
Sketch the architecture on paper. These lessons focus on concepts and trade-offs.
Internet → Nginx/Envoy → Order API
↘ Catalog API
Proxy duties: TLS certs, gzip, timeouts, request size limits, canary header routingRun Example »
This lesson uses terminal or setup steps. Run commands on your computer — the live editor appears on coding lessons.
What happened?
- Unlike a pure L4 LB mindset, reverse proxies speak HTTP deeply.
- They centralize cross-cutting edge concerns so app code stays thinner.
Practice next
- List three duties to push to the proxy.
- Set a max body size for upload APIs.
- Configure upstream timeouts separately from app timeouts.
- Add path-based routing /v2 to new catalog.
- Enable access logs with request IDs.
Remember
Reverse proxy = HTTP edge brain. Centralize TLS and limits. Keep upstream timeouts intentional.
Envoy at ShopNest edge
Envoy terminates TLS and routes by path.
Outcome: Services behind it speak plain HTTP on the mesh network.
Interview prep for this lesson
Practice these questions aloud after reading—each links to a full structured answer.
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