Algorithms

• The Algorithms
• labuladong/fucking-algorithm
• jwasham/coding-interview-university
• kamyu104/LeetCode-Solutions
• AlgoTree
• Algorithm Notes
• Top 25 Algorithms Every Programmer Should Know

Blog posts

• Watch People Doing the Thing
• Write it down, find out what you don't know
• A Developer's Second Brain on Plaintext
• My productivity app for the past 14 years has been a single .txt file
• Plan.txt : The Most Effective Productivity Tool That You’ve Never Heard Of
• Deep Habits: WorkingMemory.txt (The Most Important Productivity Tool You’ve Never Heard Of)

Books / resources

• Ebook-dl
• edu.anarcho-copy.org
• ivanarandac/Free-Algorithm-Books-1
• kapcino/programming-ebooks

Coding tutorials

• Golang Comprehensive Tutorial Series

Database

• Use The Index, Luke
• Modern SQL
• PostgreSQL at Scale: Database Schema Changes Without Downtime
• Adding or removing individual SQL modes in MySQL's sql_mode variable

System design

• donnemartin/system-design-primer
• Big Ball of Mud
• HighScalability All Time Favorites
• The Architecture of Open Source Applications
• Stack Overflow: A Technical Deconstruction

Company blogs:

• Uber Engineering
• Discord Engineering
• Etsy Code as Craft
• Netflix TechBlog