Composer

The dependency manager for PHP, used to declare, install and autoload project libraries.

3 projects using Composer

Spotify NextUp – Collaborative Jukebox

Collaborative jukebox for Spotify: guests search and vote, and the top‑voted track is auto‑queued a few seconds before the current one ends. QR codes planted around our flat during parties ended the music DJ duties for good. You don't like this track? Search and vote for the next one!

  • Search and vote on tracks (duplicates avoided)
  • SPA frontend showing current votes and upcoming tracks.
  • Configurable voting rules (e.g. min votes before queuing, allow up/down voting of other suggestions)
  • Long running queue service manager via ReactPHP event loop
  • Dockerized Apache/PHP with Composer; simple file store with locking for concurrent access.
Timeframe: 2017

Enterprise Web Application for Meat Producing Industry

Web-based enterprise application for the meat producing industry (Schlachthof). Based on the same self-developed platform used for the courier logistics application, featuring integration of domain-specific import and export interfaces (e.g. EDIFACT) and generation of domain-specific PDF documents to fulfill regulatory requirements applicable to the meat processing industry in Germany. As of 2025, this application is still in active use.

Timeframe: 2015 to 2020
 as Freelancer

Enterprise Web Application for Courier Logistics

Web-based enterprise application for courier logistics with carrier interfaces for 'derKurier', FedEx and GLS. Features automatic bookkeeping, invoicing, tax calculations, way bill generation and remote printing. Additional interfaces for payment imports using FinTS and exports to Datev, Stotax, Lexware. Built with self-developed backend framework including custom ORM and user rights management with full separation of frontend SPA and backend.

Timeframe: 2014 to 2020
 as Freelancer