About · principal, Skaraz Data
Stéphane Karasiewicz
I spent fifteen years learning what satellite and climate data really say, and the last few making them run in production for parametric insurers. The calculation agent role is where both meet.
Path
From satellite science to production pipelines.
- 2014 to 2017
PhD, marine ecology, Université de Lille
Phytoplankton dynamics under global change: multivariate statistics on noisy satellite data, calibration across regions, seasonal time series, and validation against ground truth.
- 2018 to 2023
Marine remote sensing researcher, IFREMER
MODIS, Sentinel-2 and 3, reanalysis products and in-situ networks along the French coast and beyond. Two R packages published on CRAN, and six researchers mentored on reproducible workflows.
- Sep 2023
Skaraz Data
Trading name of Stéphane Karasiewicz EI, registered in France (SIRET 979 870 821).
- 2024 to 2026
Raincoat, parametric insurtech
Embedded senior data scientist for two years. Ran the satellite and reanalysis layer for every peril except hurricane wind and earthquake, shipped Water Balance to production, built Heat Stress, and three daily-use dashboards.
- 2026
Independent calculation agent
Five end-to-end trigger calculations on public data, published with their limits, and the service built around them.
How I work
Three convictions.
A pipeline that needs babysitting has failed.
A model that is 95% right and runs every night without help beats one that is 99% right and needs a person.
The overlap is where the work is.
Climate science without engineering stays research. Engineering without climate science misreads the data.
Say where the method stops.
Every calculation I publish lists its limits. A number without them is not finished.
What people say
From the teams I worked with.
“Steph is a seriously talented engineer with a rare combination of skills.”
“His coding skills are unparalleled, producing efficient and well-documented codes. His ability to translate our needs is exemplary.”
“He always takes time to explain, and never loses his sense of humor even after the nth error message.”