Eric Hertwig
aka RocKordier
CTO Festival Maker
Musician Programmer Admin
Musical Fan
Born 1990
Chemnitz · Harz · Berlin · Remote
About me
I’ve been organizing events since 2007, starting with the Chemnitz music label Pablizity – Sunrised Music. Since then I’ve been building the tech and infrastructure behind festivals: as CTO at Rocken am Brocken, at Höme – für Festivals and at LDE Solutions. I develop software, run servers and make sure everything works by the time the first band takes the stage.
Beyond that, I make music and have done so since I was five. I also love going to musicals, have things made on my Prusa CORE One+ INDX 8-Tool, and stand on a yoga mat or on skis. There’s gaming too: Zelda, The Witcher and Assassin’s Creed on Xbox and Switch.
Career
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since 2025
Partner & CTO
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since 2021
Head of IT Services & CTO
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2013–2021
Senior Developer & Data Protection Officer
Working student from 2013, senior developer from 2015.
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since 2012
CTO & Production
You could also find me backstage at Feel Festival, Moyn Festival, Summertime Festival, Puls Open Air, Festival Playground and many more.
What I work with
- Focus
- API design, design patterns
- Infrastructure
- AWS, Docker, Kubernetes, Traefik, Ansible
- Network
- UniFi, Wi-Fi across entire festival sites
- Workflow
- Git, automation with GitLab CI & Renovate
- Development
- PHP & Symfony (OroPlatform, OroCRM), Next.js
- Apps
- iOS & macOS with Swift & Xcode
- AI
- Claude