api
OPERATIVE-3 · suggested from Analyst

API & Web Systems Forge

Sixteen challenges across the HTTP protocol, REST design, database modelling and performance — the working knowledge behind every backend feature.

flag Game Missions

01

Mission 01: HTTP Fundamentals

The protocol underneath everything — read it precisely and most web bugs explain themselves.

bolt 200 XP stars 20 SP
play_circle

HTTP Status Code Concepts

Web dev RECON-5
arrow_forward
play_circle

Distinguish 401 from 403

Web dev TACTICAL-4
arrow_forward
play_circle

Pick the Idempotent Method

Web dev TACTICAL-4
arrow_forward
play_circle

Cache with ETag

Web dev OPERATIVE-3
arrow_forward
02

Mission 02: REST Design

Designing an interface other engineers can predict without reading your source.

bolt 250 XP stars 25 SP
play_circle

Name the Resource Correctly

Web dev TACTICAL-4
arrow_forward
play_circle

Version the Interface

Web dev OPERATIVE-3
arrow_forward
play_circle

Paginate a Large Collection

Web dev OPERATIVE-3
arrow_forward
play_circle

Return Errors a Client Can Act On

Web dev TACTICAL-4
arrow_forward
03

Mission 03: Data Modelling

Schema decisions you will live with for years.

bolt 300 XP stars 30 SP
play_circle

Relational Data Aggregation

Data OPERATIVE-3
arrow_forward
play_circle

Index the Right Column

Data OPERATIVE-3
arrow_forward
play_circle

Never Mutate a Balance

Data SPECIALIST-2
arrow_forward
play_circle

Choose the Foreign Key Behaviour

Data OPERATIVE-3
arrow_forward
04

Mission 04: Performance & Reliability

Making it fast, and making it fail well when it is not.

bolt 350 XP stars 35 SP
play_circle

Eliminate the N+1

Web dev SPECIALIST-2
arrow_forward
play_circle

Cache the Leaderboard

Web dev OPERATIVE-3
arrow_forward
play_circle

Add a Timeout

Web dev SPECIALIST-2
arrow_forward
play_circle

Make the Retry Safe

Web dev SPECIALIST-2
arrow_forward