Learn System Design
System Design
The systems behind working software, drawn out so you can see the whole shape in one scan.
8 stages
The API Lifecycle
Define, Design, Develop, Test, Secure, Deploy, Observe, Distribute — as a loop you can click through, plus a self-audit for your own process.
Read it 4 join types
INNER JOIN vs OUTER JOIN
Two small tables, one shared key. Toggle INNER, LEFT, RIGHT and FULL and watch the result set change row by row, plus a self-check quiz.
Read it 6 sample keys
HashMap
Key → value, instantly. Search a shelf of books by ISBN and see why a hash lookup beats a linear scan, plus a self-check quiz.
Read it 7 laws
How to Choose a Database
Queries before engines. Walk the seven-law chain, pick the scaling pressure you actually have, and sort your stores into originals and copies.
Read itLooking for something else?
Algorithms, SEO, marketing and growth guides all live in one place.
← All learn resources