Schedule 2025

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Schedule

Schedule 2025

Our program. Click a talk for details.

Rooms

SOFTWARE & HARDWARE (SO-HA) ➡️ Main stage
DATA CENTERS / INFRASTRUCTURE / MANAGEMENT (DIM) ➡️ Upstairs, bUm Box
COMMUNITY TRACK ➡️ Downstairs on your left

Thursday, 13 Nov Friday, 14 Nov

Thursday, 13 November 2025

Time

Software & Hardware (So-Ha)

Data Centers / Infrastructure / Management (DIM)

Community Track

08:00
Doors Open & Registration
09:00
Arne Tarara
Welcome & Introduction to the conference 🇬🇧
Arne Tarara | Stefan Ullrich | Friederike Hildebrandt
Green Coding Solutions | Bits & Bäume
Software & Hardware (So-Ha) Introduction
09:20
Arne Tarara
Keynote: State of Green Digital Tech 2025 🇬🇧
Arne Tarara
Green Coding Solutions
Software & Hardware (So-Ha) Keynote - 20 min.
09:45
Kay Makowsky
Green your Code: Oaklean’s vision for sustainable Node.js projects 🇬🇧
Kay Makowsky
Hitabis
Software & Hardware (So-Ha)
Arne Tarara
CarbonDB - Real Time carbon emissions mapping to heterogenous IT infrastructure 🇬🇧
Arne Tarara
Green Coding Solutions
Data Centers / Infrastructure / Management (DIM)
Hannah Herbst
Grundlagen von IT-Nachhaltigkeit 🇩🇪
Hannah Herbst
Rewion
Community Track
10:15
Moritz Bölter
Coding Smarter for a Greener Future | A comparison between Go & Java 🇬🇧
Moritz Bölter
Lufthansa Industry Solutions
Software & Hardware (So-Ha)
ELISE AUVRAY
Empowering Devs to Act: Bringing Environmental Metrics into Infrastructure Decisions 🇬🇧
ELISE AUVRAY
Scaleway
Data Centers / Infrastructure / Management (DIM)
Danijel Soldo
Paint It Green – How Open Source Helps Reduce the Environmental Impact of AI 🇬🇧
Danijel Soldo
Red Hat
Community Track
10:40
Coffee Break (15 min)
10:55
David Kopp
Jan Kirchner
Green Frontend - Measuring and understanding the environmental impact of web applications 🇬🇧
David Kopp | Jan Kirchner
envite consulting
Software & Hardware (So-Ha)
Holger Smolinski
Jens Gröger
Methods to determine the environmental footprint of software – on the way to standardisation 🇬🇧
Holger Smolinski | Jens Gröger
Bosch | Öko-Institut
Data Centers / Infrastructure / Management (DIM)
Paloma Oliveira
Open Source as Sustainable Infrastructure: From Shared Code to Greener Compute 🇬🇧
Paloma Oliveira
Sovereign Tech Agency
Community Track
11:50
Björn Ganslandt
Fighting hardware obsolescence with greener frontend code 🇬🇧
Björn Ganslandt
-
Software & Hardware (So-Ha)
Dryden Williams
Rerouting the Cloud: Cutting 90% CO₂ and Cloud Costs with Smarter Workload Shifting 🇬🇧
Dryden Williams
CarbonRunner
Data Centers / Infrastructure / Management (DIM)
Philipp Kersting
Open Source im Vorteil: Zertifizierung mit dem Blauen Engel 🇩🇪
Philipp Kersting
Oktobit
Community Track
12:20
Anna Zagorski
Blauer Engel für Software - Award Ceremony - by Umweltbundesamt 🇬🇧/🇩🇪
Anna Zagorski
Umweltbundesamt
Software & Hardware (So-Ha)
Matthias Haymoz
Flying Blind: Why Datacenter Sustainability Needs Real Data, Not Marketing Claims 🇬🇧
Matthias Haymoz
SDEA
Data Centers / Infrastructure / Management (DIM)
12:50
Lunch (60 min)
13:50
Robert Keus
Cas Burggraaf
How to build a sustainable AI infrastructure 🇬🇧
Robert Keus | Cas Burggraaf
GreenPT / Brthrs Agency
Software & Hardware (So-Ha)
Rainer Karcher
Prof. Dr. Henning Klaffke
The "missing middle" of green IT: Why twin transformation fails without skills development 🇬🇧
Rainer Karcher | Prof. Dr. Henning Klaffke
Heartprint | Berufliche Hochschule Hamburg
Data Centers / Infrastructure / Management (DIM)
Valeria Salis
From shy contributor to (kinda) confident community leader 🇬🇧
Valeria Salis
Freelance Tech Sustainability Consultant
Community Track
14:20
Martin Michalitsch
GreenWeb Showcase WienIT 🇩🇪
Martin Michalitsch
Wien IT
Software & Hardware (So-Ha)
Oliver Winks
Using Generative Adversarial Networks to Reduce the Impact of Website Images 🇬🇧
Oliver Winks
Cardamon
Data Centers / Infrastructure / Management (DIM)
Joseph P. De Veaugh-Geiss
Bettina Louis
Carolina Silva Rodé
End Of 10”: How the FOSS Community is Combatting Software-Driven Resource and Energy Consumption 🇬🇧
Joseph P. De Veaugh-Geiss | Bettina Louis | Carolina Silva Rodé
KDE Eco | End of 10 Team
Community Track
14:50
Dr. Oleksiy Kozlov
One-pedal green computing: no (workload) shifting required 🇬🇧
Dr. Oleksiy Kozlov
HITS gGmbH
Software & Hardware (So-Ha)
Edouard Guégain
Ecodesign in mobile development with DevGreenOps 🇬🇧
Edouard Guégain
Greenspector
Data Centers / Infrastructure / Management (DIM)
Bits & Bäume
Bits & Bäume Community Meetup - Open for Everyone ❤️ 🇬🇧/🇩🇪
Bits & Bäume
Bits & Bäume
Community Track
15:15
Longer Coffee break (30 min)
15:45
Geerd-Dietger Hoffmann
cat /proc/energy: Power and Carbon Awareness Made Simple 🇬🇧
Geerd-Dietger Hoffmann
Green Coding Solutions
Software & Hardware (So-Ha)
Marvin Hötger
Olaf Quade
Sustainable hosting & data center insights: experiences & challenges of a web hoster 🇬🇧🇩🇪
Marvin Hötger | Olaf Quade
Mittwald
Data Centers / Infrastructure / Management (DIM)
Julian Bothe
Data centers and their energy consumption: public opinion vs. politics 🇬🇧
Julian Bothe
AlgorithmWatch
Community Track
16:15
Marco Liess
Linux Power Management
Marco Liess
TU Munich
Software & Hardware (So-Ha)
Richard Kenny
Understanding Data Centre IT efficiency - The Hidden Power Source 🇬🇧
Richard Kenny
Interact DC
Data Centers / Infrastructure / Management (DIM)
Dr. Anne Mollen
Beware of green AI – or what Big Tech likes to make of it
Dr. Anne Mollen
University of Münster
Community Track
17:10
Max Weber
Green Configuration: Reducing Software Energy Consumption Through Configuration 🇬🇧
Max Weber
Leipzig University
Software & Hardware (So-Ha)
Anita Schüttler
Making spot instances work for sustainability 🇬🇧
Anita Schüttler
Neuland - Büro für Informatik
Data Centers / Infrastructure / Management (DIM)
David Mahoney
Place-conscious-poetic: Grounding the Cloud 🇬🇧
David Mahoney
University of Edinburgh
Community Track
18:00
Networking & End of Program
19:00
➡️ Conference Dinner

Friday, 14 November 2025

Time

Software & Hardware (So-Ha)

Data Centers / Infrastructure / Management (DIM)

Community Track

08:00
Doors Open & Registration
09:00
Prof. Dr. Andreas Brunnert
How accurate are current tools and models for estimating software energy consumption? 🇬🇧
Prof. Dr. Andreas Brunnert
RETIT GmbH / Hochschule München
Software & Hardware (So-Ha)
From Carbon Footprint to Cost Savings: Sustainable Optimization of AI Systems with GAISSA-Optimizer 🇬🇧
Joel Castaño Fernández, Alexandra González Álvarez, Violeta Bonet Vila
Universitat Politècnica de Catalunya
Data Centers / Infrastructure / Management (DIM)
Stefan Kruijer
Let's be honest. A reality check on sustainability in digitalization 🇬🇧
Stefan Kruijer
SustyDigi
Community Track
09:55
Frank Karlitschek
Software Sustainability through Green Gates @ Nextcloud
Frank Karlitschek
Nextcloud
Software & Hardware (So-Ha)
Amael Parreaux-Ey
Scaling the ability to experiment with digital product eco-design 🇬🇧
Amael Parreaux-Ey
Resilio
Data Centers / Infrastructure / Management (DIM)
Sarah-Indra Jungblut
Deutschlands Rechenzentren boomen – und damit auch ihre Energieprobleme 🇩🇪
Sarah-Indra Jungblut
RESET - Digital for Good
Community Track
10:25
Josefine Kipke
Measure what you manage: Transparent Energy consumption of cloud infrastructure 🇬🇧
Josefine Kipke
Open Source Business Alliance
Software & Hardware (So-Ha)
Prof. Dr. Anne Schwerk
XAI: Fairness, Robustness, and Sustainability 🇬🇧
Prof. Dr. Anne Schwerk
IU International University of Applied Sciences / Accenture
Data Centers / Infrastructure / Management (DIM)
10:50
Coffee Break (15 min)
11:05
Wilco Burggraaf
Built to Last: The Art of Sustainable Software Design 🇬🇧
Wilco Burggraaf
Hightech Innovators
Software & Hardware (So-Ha)
Aydin Mir Mohammadi
One year of the CO2-challenge – insights and lessons learned 🇬🇧
Aydin Mir Mohammadi
Bluehands
Data Centers / Infrastructure / Management (DIM)
Jo Walton
Who Owns The Future of Green AI? 🇬🇧
Jo Walton
Digital Humanities Lab / University of Sussex
Community Track
11:35
Antonia Buß
A look inside the engine room: Measuring sustainability in software systems 🇬🇧
Antonia Buß
Adesso SE
Software & Hardware (So-Ha)
Thomas Fricke
Datacenter Degrowth and Decentralization as a Chance for Europe 🇬🇧
Thomas Fricke
Freelance Cloud Security Architect
Data Centers / Infrastructure / Management (DIM)
Paul Robben
Small Seeds: Software nachhaltig entwickeln & fördern 🇩🇪
Paul Robben
Prototype Fund
Community Track
12:05
Bundesverband Green Software
Bundesverband Green Software - Green Software Initiative Award 🇩🇪
Bundesverband Green Software
Bundesverband Green Software
Software & Hardware (So-Ha)
Chris Adams
Connect, not collect - making digital sustainability standards discoverable with carbon.txt 🇬🇧
Chris Adams
The Green Web Foundation
Data Centers / Infrastructure / Management (DIM)
12:35
Lunch Break (60 min)
13:35
➡️ Workshops (3h)
16:35
Networking & End of conference (2h)
Workshops

Workshops 2025

Bits & Bäume Community Workshop / Meetup

Held by Bits & Bäume
Room: Community Space
Bits & Bäume Community Workshop / Meetup

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Bits & Bäume Community Workshop / Meetup

Blue Angel Certification - Workshop

Held by Arne Tarara
Room: Seminar Room 1 - Downstairs
A workshop to understand, the impact of digital technologies on the environment and how to reduce it.

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Blue Angel Certification - Workshop

Deep Sleep by Design - Building Linux Products that truly Sleep - Workshop

Held by Hagen Pfeifer
Room: bUm Box, Upstairs
A workshop to engineer low power linux systems to be used in mobile or embedded systems

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Deep Sleep by Design - Building Linux Products that truly Sleep - Workshop

Green Mindshift in Software Development - Workshop

Held by Prof. Dr. Verena Majuntke / Anita Schüttler
Room: Community Track Room, Downstairs
A workshop to evaluate how to integrate sustainability in software design and development processes

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Green Mindshift in Software Development - Workshop

How to start with Green AI - Workshop

Held by Florian Bartling / Philipp Dressler
Room: Seminar Room 2 - Downstairs
Discuss and evaluate hands-on sustainability and efficiency criteria of off-the-shelf AI products

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How to start with Green AI - Workshop

Innovation & Connection Café

Held by Didi Hoffmann
Room: Main Room
A workshop to connect and learn from peers to solve current engineering challenges around green software.

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Innovation & Connection Café