Hi, I am Martin.

I like to build things with data. I also invest in companies that tackle climate change. Find me on LinkedIn
In 2021, my wife and I changed the roof of our flat. Doing so we avoid 1.5 tons of CO2 equivalent yearly. Learn more how to measure home renovation energy savings.
I am the co-founder of Carbonfact, a company on a mission to decarbonize the fashion industry. Carbonfact is backed by YCombinator. Learn more about it here
I launched Covidliste which became the largest waiting list for Covid-19 vaccination centers in France. In 6 weeks, a team of 200 remote volunteers helped 4k vaccination centers notify 1.1m people. Covidliste code is open source. Learn more here or on our blog here
Carnot helps french homeowners measure the cost and the carbon intensity of their heating system and their alternatives. The app leverages the DPE dataset from ADEME, the French agency for the Energy and Environment.
Greenhouse Gas Emissions
I designed a few interactive visualizations on Observable. That includes a country, sector and sub-sector breakdown as well as a methodology to decompose growth rates using GHG emissions.
Covid-19 Bed Tracking
In partnership with hospital group Paris Saclay from AP-HP we teamed up with Guillaume Galuz and Rémi Quilliet to produce an app that gather output from different systems and retrieve a single dashboard to track bed capacity per hospital. See code source here.
In partnership with the research center for lung transplantation at hospital Foch (France) and as part of the batch #5 of Data For Good France, we teamed up to build an ML model to improve extubation decision after a transplantation. See code source here and final presentation here (in french).
LeWagon - Data Science
LeWagon is the most acclaimed coding Bootcamp. I have helped design the content of their 9-week immersive Data Science bootcamp. Check the syllabus here.
Electricity Map
I contributed to Electricity Map a real-time display of carbon emissions related to electricity production created by Olivier Corradi and theTomorrow.
The Opportunity Project
See how much of your rent Airbnb can help cover. I had the chance to demo this app at the White House in October 2016 as part of the Opportunity Project. Learn more here
What are the jobs you could do with the same skillset ? Airjobs lets you explore this vast question. It was built by an Airbnb team at BayesHack 2016 for the Department of US Labor. You can learn more on the methodology here
Airbnb Trip Frequencies
Airbnb guests meet hosts they would not meet otherwise. This interactive adjacency matrix was built to illustrate Joe Gebbia's TED Talk Building for Trust. Learn more how Airbnb is building for trust in this medium post.
Work Hard
Do you work too much ? Work Hard lets you visualize the evolution of your workload.
Data For Good France
I have founded Data For Good France, a community of ~2000+ french data scientists that give their time to work on non-profit problems. Learn more here (in French)
Txto is a platform to back up, visualize and print your text messages.
How visitors hesitate before purchasing a flight ticket.
Market Basket Analysis
Market Basket Analysis (MBA) lets you see best product correlations.
A Day In The Life
A Day in the Life of an e-merchant. Hour by hour.