All the resources you need to get to Senior Engineer and beyond

Curated front end system design resources for interviews and learning

Front End interview preparation materials for busy engineers (updated for 2025)

Master programming by recreating your favorite technologies from scratch.

Curated coding interview preparation materials for busy software engineers

Newsletter to help busy software engineers become good at system design 👇

Publicly shared solutions to Coding Challenges

📚 Freely available programming books

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

A collection of (mostly) technical things every software developer should know about