01 /
Front-end
The browser, the language, and the interfaces you build.
HTML & CSS · JavaScript · TypeScript · React · Next.js
5 subjects to explore
02 /
Back-end
Build the services and contracts behind the interface.
Node.js · APIs · REST APIs · Express · Authentication
5 subjects to explore
03 /
Databases
Model your data, query it well, and keep it consistent.
PostgreSQL · MongoDB
2 subjects to explore
04 /
System Design
Connect the pieces. Explain the decisions and their trade-offs.
Front-end architecture · Back-end architecture
2 subjects to explore