4. DB (Database Layer)
Your app needs a memory, and that’s the database layer.
This is where you store everything — user accounts, product info, transactions, etc. Whether you use relational databases like PostgreSQL and MySQL, or NoSQL options like MongoDB or CouchDB, the key is designing schemas that make data easy to access and update.
Also, don’t underestimate the value of indexing and backups. Databases are boring… until they’re broken.
Your app needs a memory, and that’s the database layer.
This is where you store everything — user accounts, product info, transactions, etc. Whether you use relational databases like PostgreSQL and MySQL, or NoSQL options like MongoDB or CouchDB, the key is designing schemas that make data easy to access and update.
Also, don’t underestimate the value of indexing and backups. Databases are boring… until they’re broken.