Freelance developer and entrepreneur from Hamburg, Germany. 🏄♂️
My specialisation is entrepreneurship, full-stack development, machine learning, and robotics.
I'm focused primarily on complex full-stack web applications with high-performance characteristics. I'm available for hire.
♥️ Open-Source
As an open-source developer for a decade now I invested many hundreds of thousands of dollars privately so everyone
can use my software for free. I love creating products, writing code, and helping people. Following are my OSS projects.
Deepkit® - Founder
Deepkit produces high-performance developer tools for state of the art technologies to accelerate developers around the world.
css-element-queries - Creator
Make truly responsive web components using CSS container/element queries, with high-speed resize sensor.
marcj.github.io/css-element-queries
Angular-Desktop-UI - Creator
Angular & Electron desktop UI framework. Angular components for native looking and behaving macOS desktop UI.
angular-desktop-ui.marcj.dev
PHP-PM - Creator
PPM is a process manager, supercharger, and load balancer for modern PHP applications.

Propel2 - Former Lead Developer
Highly customizable and high-performance ORM for PHP.
propelorm.org
Topsort - Creator
High-Performance Topological Sort / Dependency resolver for PHP.
And some more
typedoc-plugin-lerna-packages
A plugin for Typedoc that groups all Lerna packages into own TS module.
php-rest-service
PHP-Rest-Service is a very simple and fast PHP lib for REST APIs.
jquery-selectBox
A jQuery plugin for replacing select elements.
Pesto
High-performance GUI framework in C++ highly inspired by CSS and HTML, using Skia as rendering engine.
Abandoned projects
Jarves - Creator
Jarves CMS/Application Framework based on Symfony - alpha material. Never was able to release a final version.

Kryn - Creator
A enterprise open-source Content-Management-System and Content-Management-Framework with a full RESTful API written in PHP and JavaScript.