Engineering Guides

The concepts behind each playground — explained, with the engineering that makes them hard

A Radio for Your Logs: a Backend That Talks Back

Create your own real-time voice assistant that detects incidents by monitoring log files and speaks out loud about issues.

Design and implement a custom, trait-based, fully composable actor framework in Rust, built step by step from first principles.

Implement an expression evaluator in Rust using postfix notation for calculation.

Develop a minimalistic link-shortening microservice using the Axum framework and its routing system.

Build a universal utility that transforms natural language tasks into precise command-line arguments.

Implement a real ping utility from scratch using low-level networking.

Create a small asynchronous application in just a few steps that monitors a website.

Learn how multilayer perceptrons solve non-linear problems using hidden layers and backpropagation through an XOR example.

Create a linked list from scratch with unsafe memory, raw pointers, and custom drop guards.

A straightforward guide to building a perceptron system that learns to perform basic logical operations such as AND and OR.