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Code, explained by a senior developer

Interactive courses to code with AI without handing it your thinking, free web tools, a technical blog and reference books distilled. Everything is open, nothing sits behind a paywall.

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21 courses 185 lessons 11 free tools 145 articles 43 books distilled

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Learn to code with AI

21 interactive courses, from HTML to offensive security, with one method: use AI like a senior developer, not like copy-paste.

Available · 19 lessons

Code with AI — The method

Effective prompts, verification, assisted debugging: the full method to stay in charge of your code.

~2h19 · Claude · ChatGPT Available · 9 lessons

JavaScript — The electricity

Interactivity, DOM, events, APIs. The language that makes the web move.

~1h · DOM · Fetch Available · 11 lessons

Go — Cloud infrastructure

Fast services, native concurrency, deploy anywhere. The language of modern APIs.

~45 min · Goroutines · REST Full course · 14 lessons

Web security — think like an attacker

OWASP Top 10 2025, SQL injection, XSS, with sandboxed attack labs.

OWASP 2025 · PHP · Go · JS

Also available: CSS, HTML, Advanced JavaScript, PHP, Object-Oriented PHP, OOP, Python, SQL, Git & terminal, HTTP & the network, REST APIs, Regular expressions, Web accessibility, Testing your code, TypeScript, Deploy on a VPS.

Browse all 21 courses → Not sure where to start?

Free tools

11 online tools, no signup: for developers, freelancers and project owners.

cURL converter

Paste a cURL command, get the equivalent code in PHP, Go, JavaScript or Python.

WCAG contrast checker

Check your color contrasts against WCAG AA/AAA accessibility standards.

Freelance daily rate calculator

Work out your ideal daily rate from your expenses, working days and income goal.

See all 11 tools →

The developer's library

Reference books, read and distilled: the essence of each book in one page, with an honest rating.

8.8/10

Eloquent JavaScript

Free, up to date, honest — there's simply no excuse not to read it.

8.4/10

Designing Data-Intensive Applications

Dense, demanding, monumental: the book that turns 'works on my machine' into 'I know why it breaks in production'.

8.8/10

Design Patterns : Tête la première

Ducks, pizzas and crossword puzzles: serious OOP has never been this unserious.

The Developer's Great Book: the whole craft in one thread, free PDF → All 43 book summaries →

The blog · notes from the field

145 articles on Go, architecture, performance, AI and lessons learned. In French and English.

Oct 11, 2026 · DevOps / Infrastructure

Best DevOps and Engineering Team Books, and the Order to Read Them

Six books on DevOps, continuous delivery and how tech teams work, rated and ranked in the order I would read them, with what to skip in each.

Oct 11, 2026 · Architecture

Best Clean Code and Refactoring Books, and the Order to Read Them

Seven books on clean code, refactoring, legacy code and TDD, rated and ranked in the order I would read them, with what to skip in each.

Oct 11, 2026 · Architecture

Best Event Sourcing and CQRS Books, and the Order to Read Them

Six books on Event Sourcing, CQRS and DDD, rated and ranked in the order I would read them, with what to skip in each.

All 145 articles → Subscribe via RSS

Who writes all this?

Odilon Hugonnot. Former maths and physics teacher, retrained as an environmental engineer, then full-stack developer since 2014. Now in fintech & crypto: Go, PHP/Symfony, Event Sourcing.

Also a web dev trainer and professional exam jury. On weekends I build algotrading systems. Every step has been the same job: solving problems. I just changed languages.

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See the full CV
Employed, open to opportunities