Arnaud Leroy Open Source Portfolio Dataset

A structured dataset documenting the open source portfolio of Arnaud Leroy (arnaudleroy.com), a software engineer specializing in data platforms, knowledge graphs, and cross-ecosystem tooling. This dataset catalogs eight production systems and open source projects built across 14 programming ecosystems (Python, JavaScript, Go, Rust, Ruby, Elixir, Dart, PHP, C#, Clojure, Lua, VS Code, Perl, Haskell). Each row includes the project name, primary URL, number of ecosystems it spans, entity count where applicable, a brief description, and current deployment status. The portfolio includes a knowledge graph platform with 1.8 million entities and 2.9 million relationships, a geographic discovery system mapping 440,000 locations, developer utilities for token estimation and text processing, and a multi-language content platform. Detailed architecture documentation, performance benchmarks, and technical writing about these systems are available on the project blog. The CSV contains 8 records covering the full scope of production systems, from data enrichment pipelines to real-time price tracking. For the complete project listing with source code links, visit the projects page.