Jules Henze is a Staff Software Engineer based in Zurich with 11 years of experience building scalable, data-driven systems using Python and TypeScript. With a Master's in Environmental Engineering from ETH Zurich, he uniquely bridges domain expertise in hydrology and remote sensing with production-grade software—having built operational pipelines for snow cover and runoff forecasting and advised climate-resilient water-management projects. At Ledgy he focuses on backend engineering, and his open-source work includes improving NDVI processing, cloud masking, and search efficiency for Landsat imagery in the widely used developmentseed/landsat-util project. Practical field experience—from launching monitoring initiatives in Kenya to hands-on solar installation—underscores his emphasis on deployable, impact-oriented solutions. Colleagues describe him as a pragmatic engineer who turns complex environmental requirements into reliable, automated services.
A utility to search, download and process Landsat 8 satellite imagery
Role in this project:
Back-end Developer & Data Scientist
Contributions:15 commits, 1 PR in 8 days
Contributions summary:Jules significantly contributed to the development of NDVI (Normalized Difference Vegetation Index) functionality within the landsat-util project. Their work included adding options for grayscale and color NDVI output, including a colorbar. They also implemented cloud masking based on QA band data, improving the accuracy of NDVI calculations. Furthermore, the user enhanced the latest search feature, optimizing date range searches and addressing potential database search inefficiencies.
Contributions:93 pushes, 5 branches in 1 year 4 months
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