Domains

Backend Development

Servers, APIs, databases, caches and queues: everything behind the interface.

Topics

• Backend Basics

  The everyday building blocks of a web service.

  53 concepts

• API Design

  Designing interfaces that are clear, consistent and hard to misuse.

  35 concepts

• Relational Databases & SQL

  Tables, queries and data modeling in relational databases.

  66 concepts

• Indexing & Query Performance

  Making queries fast without making writes slow.

  15 concepts

• Transactions & Concurrency Control

  Keeping data correct when many things change it at once.

  23 concepts

• Database Internals

  How databases store, index and recover data under the hood.

  13 concepts

• NoSQL & Other Data Stores

  Key-value, document, search and other non-relational databases.

  28 concepts

• Schema Migrations

  Changing the database's structure and data safely over time.

  11 concepts

• Database Operations

  Running databases in production: access, backups, replication and upgrades.

  24 concepts

• Caching

  Keeping copies of data closer and faster, and keeping them correct.

  23 concepts

• Queues & Async Processing

  Moving work out of the request and between services.

  49 concepts

• Email & Notifications

  Getting messages to users reliably: email, SMS and push.

  9 concepts

• Files & Media

  Storing, processing and serving files, images and video.

  10 concepts

• Product Building Blocks

  The features nearly every product needs, and the pitfalls hidden inside them.

  26 concepts