Stéphane Karasiewicz

Independent calculation agent for parametric insurance. Stéphane Karasiewicz EI, trading as Skaraz Data.

• Trigger audits, index design and feasibility, onboarding of one index (definition, pipeline, backtest, methodology report)
• Pipeline support and independent verification; calculation agent service set up per contract
• Five proofs of concept on public data with limits named: coral heat stress, pluvial flood, cyclone wind, crop drought

Parametric insurtech (Seed-stage, San Juan, Puerto Rico). Climate risk technology.

• Ran the satellite and reanalysis data layer for every peril except hurricane wind and earthquake, across 10+ countries in Latin America, the Caribbean and Africa: precipitation and drought maintained in production, water balance built from scratch to production, heat stress built but not shipped
• Engineered automated data management for 2 TB+ satellite & reanalysis data (CHIRPS, IMERG, ERA5-Land, Copernicus CDS, WEkEO)
• Delivered a modular architecture roadmap as a scoped technical handoff for scaling to new perils, transferred to the team at contract end
• Ran dev/ops solo for production pipelines at end of contract; built 3 country-level operational dashboards (Precipitation, Water Balance, Drought)
• Tools: Python, xarray, GDAL, Docker, PostgreSQL, scikit-learn

French National Institute for Ocean Science. 5+ years in satellite remote sensing for marine ecology.

• Operated production R pipelines processing 500 GB+ satellite & in-situ data; reduced manual effort by 50 hours/month
• Authored 2 CRAN packages (BDAlgo, subniche) with 8,000+ cumulative downloads and 27+ citations
• 7 peer-reviewed publications on environmental modeling using MODIS, Sentinel-2/3, and reanalysis data
• Mentored 6 researchers and Master's students on R, Git, and reproducible research