Jonas Holfeld

Hi, I’m Jonas. I’m a web-developer and musician. I work as a freelancer, usually together with graphic designers, to develop full-stack websites that are customized from CMS to Frontend, accessible, mobile friendly and responsive. I love to work with Kirby!

Get in touch:

I also work for ScaDS.AI in Leipzig. Besides that I’m an electronic music enthusiast, DJ and producer. I run the label PH17 together with and mainly put stuff out under my moniker Stanley Schmidt.

I regularly work together with these designers to make great looking websites. Check them out:

Get in touch if you need a web-programmer, I'm also happy to recommend a graphic designer for your project. I also do creative coding and sound and music-based stuff.

Font used on this website: New Edge 666 Light by


Website, Easter-Eggs, Sounds and Riddles for our new event series in Leipzig. Design by Anja Kaiser.

Professional Media Master Class

Kirby Backend + Custom Frontend for the Professional Media Master Class. Together with Knoth & Renner.

Insert Female Artist

Kirby Backend + Custom Frontend for the literature festival Insert Female Artist. Concept and design by Janett Andrejewski, Stefanie Leinhos and Franziska Leiste.

Transit Architektinnen

Kirby Backend + Custom Frontend for the architects Laura Bracke and Diana Felber. Design by Wolfgang Schwärzler.

Emergency Support Initiative

Kirby Backend + Custom Frontend for an Emergency Support Initiative for cultural workers in Ukraine. Design by Wolfgang Schwärzler.

You Can’t Trust Music

Kirby Backend + VueJS Custom Frontend for Xenia Benivolski / Eflux. Together with Knoth & Renner.

Camelot Typefaces

Mobile Version and new features for Design by Camelot, code-basis by Toni Schönbuchner and Christoph Knoth.

DJ YUMYUM - Decisions

Website for our label PH17 on the occasion of the release of DJ YumYum’s release. Together with Anja Kaiser.

Kunst, Spektakel, Revolution

Kirby Backend, Data-Migration + Custom Frontend for Kunst, Spektakel, Revolution.

Kyiv Biennal 2021

Kirby Backend + Custom Frontend for the 2021 Kyiv Biennial. Design by Wolfgang Schwärzler.


Kirby Backend with data migration + Custom Frontend for The European Media Art Platform EMAP. Together with Knoth & Renner.


Web-based piece together with Anja Kaiser. Design by Anja Kaiser, coding and sound by me. Concept: both. The piece was part of the online edition of Balance Club Culture Festival 2020.

Kirby3 Many To Many Plugin

Kirby3 Plugin for easy many-to-many relationships without a database. I made this while being an intern and under the supervision and help of Knoth & Renner.

Tender Squad Compilation

Curation of the compilation of Balance - Club Culture Festival as part of the 2020 online edition of the festival.

Smart Replies

My first full length EP on Vienna Records.


Solaris asked me to record one hour of music for her RINSE.FM show.

Binaural Beats

Monthly radio show on Radio Corax together with Hobor.


Label and mix curation since 2016 together with Solaris, Hobor and Schroeter und Berger.