Hello, fellow developer 👋

Notes, tutorials and books for people who build software.

Most of what I write here is a knowledge dump for future me: what it is, how to do it and how to fix it. Hopefully you find it useful too.

Books

All books

New book

GitLab CI/CD, Decoded

Read, trace and fix any enterprise pipeline

GitLab 19.3
GitLab.com and self-managed
Worked examples on AWS

Your project's pipeline file is twenty lines long; the pipeline it produces is not. Learn to read any GitLab pipeline a central team built for you: where each job comes from, why it ran, what it was given, and what to do when it breaks. Everything is worked on one fictional company's templates, with 68 symptom cards for the failures you will meet. Read the core in about three hours, and press ⌘K to look up any keyword, variable or error message.

Read online

New book

Java for C# Developers

A working handbook for .NET engineers moving to Java and Spring Boot

Java 25 LTS
.NET 10 · C# 14
Spring Boot 3 & 4

Where your C# instincts carry over to Java, and where they are confidently wrong. Almost every page puts C# on the left and Java on the right. Read the core in about ninety minutes or everything in two to three hours, and press ⌘K to look up any C# name and land on its Java answer.

Read online