Your cloud bill goes down, or you pay nothing.
I audit your bills, find the savings and help your team apply them, for 20% of the measured savings over 12 months. Or on a daily rate, inside your team.
Cloud architect · FinOps · Author
I'm Mathieu Kerbel.
Self-taught, writing code for clients since 2019. I went from freelance gigs to cloud architecture on large production platforms, and I write Rust by choice. Today I help teams cut their cloud bills, and I work as a freelance architect.
- FinOps Foundation member
- AWS · Azure · Google Cloud
- Rust by choice
- Paris or remote
contact@mathieukerbel.com · Paris or remote
From freelance gigs to large production platforms.
Seven years of writing code for clients, from embedded systems to cloud platforms in production.
- 2019First paid code, then freelance work while still at school.
- 2021–2023More than 50 freelance clients, from embedded systems to high-performance computing.
- 2024–2025EDF Power Solutions: a real-time IoT platform with over a million sensors, on AWS with Azure as the disaster recovery site. Then a simulation engine moved from C# to Rust: runs went from 7 h 30 to under 30 seconds, and cloud costs fell by about half.
- 2026FinOps paid on results, and a book: Something from Almost Nothing.
They trusted me.
EnergyA real-time IoT platform, and a simulation engine moved from C# to Rust.
LeisurePlatform engineering: a developer plugin and a bug telemetry platform.
RailValidation on high-speed and intercity trains, in Europe, Egypt and the United States.
RetailThe run and evolution of an on-premises Hadoop data lab.
Three habits that show up in every mission.
The same ones in an audit and in an architecture mission.
01
I read every bill myself.
Every audit is led by me, from the billing export to the call with your CTO and your CFO.02
Cost is part of the design.
I treat the bill as a design constraint rather than a surprise after the build.03
Nothing ships without your team.
Your engineers review and deploy every change. Nothing changes in production without their approval.Three ways to work with me.
A lower bill, a book, or an architect on your team.
Something from Almost Nothing
Reproduce what already existed, deepen it with tools its origin never had. A method in five moves, with the EDF Power Solutions case worked through. PDF, 95 pages, English and French.
€29 · chapter 1 free
An architect on your team
Architecture, migrations and performance work on AWS, Azure and Google Cloud, with cost treated as a design constraint. Up to 20 days a month, in Paris or remote.
What I publish, and where.
Articles on the site, newsletters on LinkedIn.
A first look at your bill, together.
A call first · then an NDA · then the billing exports