Event overview
We’re excited to be submitting an event to Bristol Tech Festival+ once again featuring 2 fantastic local GreenTech pioneers. Our event is part of the ‘Community Track’ at BTF+ – techSPARK and we’ll be hearing from Dryden Williams (CEO, CarbonRunner) and Ed Walsh (Head of Product, ZapMap).
Shifting CI/CD workloads to save money and emissions
CarbonRunner shifts workloads — from GitHub Actions to AI training — across multiple cloud providers like AWS, Azure, and GCP. They’re faster and 25% cheaper and 10x lower emissions than GitHub.
CarbonRunner is a multi-cloud CI/CD runner that dynamically shifts workloads to the lowest carbon regions without changing your workflow. The platform optimizes for both cost and sustainability, ensuring your builds run efficiently, saving money and slashing emissions.
Dryden will be covering;
* Problem – Cloud compute and AI power demand is booming and it’s expensive
* Solution – Shifting to low carbon regions is cheaper and greener
* Some cool stats we’ve found from shifting to 47 low-carbon regions saving 90% of emissions and 25% of cost.
About Dryden

I’m Dryden, a passionate techie, environmentalist and surfer, building tools like [CarbonRunner.io] to reduce the carbon emissions of the internet.
Dryden’s slides
Coming soon!
Zapmap – going beyond making charging simple
Zapmap has long been one of the most valued tools for EV drivers, helping them navigate the transition to electric, and also playing a leading role in informing and guiding industry investment and government policy.
Ed will cover where it all started, how the product has grown and evolved, successes & failures in an emerging industry, and what the future holds for one of the UK’s leading charging service.
About Ed
I’m Ed, Head of Product at Zapmap, and an experienced coach and Product Leader. I’m passionate about tech and user experience, as well as being a lover of the natural world, a keen photographer and hiker, and regular explorer of the UK’s beautiful landscape.
Ed’s slides

Watch the event video
- 01:06 – Event welcome from organisers Ellen and Mike
- 2:46 – 60 second intros – a chance for in-person and online attendees to introduce themselves, ask for help or share something interesting
- 11:32 – CarbonRunner talk
- 28.40 – ZapMap talk
- 50:23 – Q&A
Community 60 second intros
An opportunity for you, our community, to (very quickly) share something with the rest of us. This can be anything from a green tech project or initiative you are working on, a request for help or guidance or even some knowledge/resource you’d like to share with others
Julien Nioche – Julien is a Green Software Advocate and Director at Digital Pebble who gave a great talk, Green Ops in Practice: Tools, Data and Culture for a Sustainable Cloud, for Green Tech South West in September. Julien has recently secured a deal with one of their partners Greenpixie, leading provider of usage-based sustainability data for hyperscaler cloud users (AWS, Azure, GCP), which will allow Green Tech South West members to access the Greenpixie Academy for one week using the following code: GTSW100, exp 15th Oct. The academy covers the basics of cloud emissions and overlaps nicely with Julien’s Green Tech South West talk.
Oliver Cronk – Oliver is the Technology Director at digital tech consultancy Scott Logic, where he leads the sustainable tech initiatives. Not only do Scott Logic kindly host us at their Bristol offices, they are also working on a number of open source projects in the green tech space including the Tech Carbon Standard (which Oliver discusses in more detail in his Green tech open source initiatives talk for Green Tech South West), work around Sustainable AI and more. We are thrilled to thrilled to welcome Oliver back as a speaker on Thursday December 4th at Scott Logic, so keep an eye on our meetup page.
Geraint Jones – Geraint is a Knowledge Transfer Adviser at Innovate UK Business Connect, supporting knowledge transfer partnerships (KTPs) for companies, charities, NFP’s and public organisations who are looking to grow through innovation. KTP’s typically last between 1 to 3 years and can help organisations reach their business or impact goals by addressing the missing piece of the jigsaw (e.g. a technology or process) through subsidised partnerships with an academic teams or technology specialists. If your organisation is looking to innovate their processes do consider a KTP and speak to Geraint via his LinkedIn.
Ian Brooks – Senior Lecturer in Sustainbale IT at the University of the West of England. He is currently teaching final year UWE computing students on the Sustainable Business & Computing module and is keen to find them jobs which will value their sustainability knowledge. He is interested to hear I’m interested to hear from anyone who is recruiting for graduate entry jobs in Green IT, whether that is around skills to make IT lower carbon / more sustainable, or Green businesses recruiting for IT skills. Please don’t hesitate to get in touch with Ian at ian.brooks@uwe.ac.uk.
Our slides with upcoming events
This event is made possible by kind sponsorship from: