I'm Danny, an independent software developer from the Netherlands and founder of ibericode. I mainly write PHP, Python, SQL, JS, HTML and CSS but also know my way around Go, Rust and C.
- Mailchimp for WordPress: the #1 Mailchimp plugin for WordPress, actively used on well over 2 million sites.
- Koko Analytics: lightweight, privacy-friendly and open-source analytics for WordPress. No third-party services.
- ibericode/vat: PHP library to handle EU VAT rules.
- 1BRC: one of the fastest implementations of the 1 Billion Rows Challenge, in standard C99 with POSIX threads.
- Nederlang: bytecode interpreter and virtual machine for a programming language with Dutch keywords, in Rust.
- Advent of Code: solutions for 2015–2025, in C, Rust, Python, Go and PHP.
- Fathom Analytics: I co-founded Fathom, built the original open-source version (7,000+ GitHub stars), and got the business off the ground before handing it off to my co-founder, who has since grown it into a thriving privacy-focused analytics SaaS.
- Browserpass: browser extension for pass utilizing native messaging.
You can find more of my code on GitHub.





