Deep dives that start from first principles.

Exhaustive, code-first series for engineers who want to understand the machinery, not just pass an interview. No prior background assumed, nothing hand-waved.

Series

Articles

30h

Content

Python

From First Principles

Every fundamental concept, taught through analogies and hands-on demos instead of a syntax dump.

variablestypesintfloat

15 ~5h

Start

System Design

From First Principles

How real systems are built at scale, through interactive diagrams and worked trade-offs, not buzzwords.

httpdnstcpnetworking

15 ~5h

Start

LLMs

From Scratch

A large language model built up from next-token prediction to a working GPT you code yourself.

language-modelnext-token-predictionprobabilitygpt

15 ~5h

Start

Web Security

From Exploit to Fix

Every major vulnerability class shown breaking real code, then fixed. Ends in a consolidated OWASP Top 10 checklist.

sql-injectionnosql-injectioncommand-injectionparameterized-queries

12 ~4h

Start

AI Engineering

From Prompt to Production

Building real products on hosted models: prompting, RAG, agents, evals, cost, and shipping, not a LangChain tutorial.

llm-apitokenscontext-windowinference

15 ~5h

Start

OOP Remaster

Object-Oriented Python Rebuilt

Eight articles rebuilding OOP from first principles. Objects, the four pillars, magic methods, and modern patterns. No prior OOP knowledge assumed.

objecttype()dir()state

8 ~3h

Start

Modern Python

Write It the Way It Was Meant

Every article is a before/after: the pattern you wrote in 3.5-3.8, and the cleaner version available now. Type hints, pattern matching, dataclasses, and the stdlib you are not using yet.

type hintslist[int]str | NoneTypeAlias

8 ~3h

Start

More series are on the way. We're always writing the next one.