Geerd-Dietger Hoffmann or Didi

Hey, this is my personal website placeholder. You can find some information about me, what I find interesting and what I have done. But mainly it is how to contact me.

I am co-Founder & CTO at 👾 Green Coding Solutions , live in 🇩🇪 Potsdam and am a regenerative 👨🏻‍🌾 farmer at BioHof Potsdam. I am also perusing a PhD at the University of Potsdam.

Next to my work I am also the creator and maintainer of:

• Green Kernel Project: Linux kernel extensions to measure the CO2 of processes
• meerverse.com A suite of tools I created for power users
  • meerail.com : An email client for hardcore users
  • meerato.com : A todo list made for people that have a lot of projects
  • meercal.com A calendar app
  • meerpic.com A photo app that can handle 100s of GBs
  • meerpad.com Writing like a pro
• OSLS : The Open Source Labeling Scale Project
• Co organizer of the eco-compute.io conference

☎️ Contact information#

📧 contact@ribalba.de

🖥️ https://github.com/ribalba/

🔗 https://www.linkedin.com/in/dietgerhoffmann/

🏳️‍🌈 he/ him

I stopped using social media (twitter, X, facebook, etc.) so please don’t try to contact me under my old accounts!

📕 Worth reading#

Student Projects

🎓 Selected Recent Papers#

• CAIN 2026 - MLOX: Open-Source MLOps for the Rest of Us
• SusTech 2026 - Resource Efficiency Software Index (RESI): Towards Software Product Comparability
• IC4S 2026 - Sustainability Aware Workload Shifting Beyond Carbon Intensity
• Limits 2026 - Measure Once, Model Everywhere: Model-Based Per-Request
  Resource Consumption for HTTP

👩🏻‍💻 Past work experience#

• CTO & ClimateFarmers
• CTO & EcoWorks
• CTO & Teleomed
• CTO & eHealthAfrica
• CEO & dbook
• CEO & CigarCities
• WiMi & TU-Berlin
• DEV & CERN
• DEV & IBM