Full-stack developer specializing in back-end & distributed systems
Performance & energy profiling · Eco-design · GreenOps
Tech Lead Green IT & IT for Green at the Institut du Numérique Responsable
Languages
Frameworks & ORMs
Data & messaging
DevOps & observability
I build backend systems and I care about what they cost: in latency, in infrastructure, and in carbon. Digital sustainability is not my job title but a long-standing, near-professional commitment, and it shapes how I build software.
- Tech Lead Green IT & IT for Green at the Institut du Numérique Responsable (INR), the French non-profit that grew out of the Club Green IT
- Building the Perf Sentinel ecosystem, open-source tooling that finds I/O anti-patterns in OpenTelemetry traces and prices them in energy and carbon. It started as a personal project and now lives on the INR GitHub, and I still lead it
- Interested in measuring energy at the code level (eBPF, RAPL, flame graphs) rather than guessing
- Learning Rust the hard way, coming from a Java / Spring Boot background
- Founder and president of GCOUDE for 3 years, a scientific association that organized conferences with researchers from IPCC, IPBES, BRGM and CNRS
Perf Sentinel (engine) and Perf Sentinel Hub, stewarded by the Institut du Numérique Responsable
| Performance engineering | N+1 detection, flame graphs, cold-start and memory footprint (JVM AOT cache, .NET NativeAOT), load testing with k6 |
| GreenOps | SCI specification, energy and carbon estimation from traces and hardware counters, regional carbon intensity |
| Eco-design | Measuring before optimizing, tooling such as Firefox Profiler, AMD μProf, Creedengo and Perf Sentinel |
| Architecture | Hexagonal architecture, microservices, distributed systems |
Measure first, optimize second, and keep an eye on the carbon bill.