Catalogue of Life
The Catalogue of Life is a European Union-funded program to create a complete index of the world's known species. The Catalogue of Life supports major biodiversity and conservation information services such as the Global Biodiversity Information Facility, Encyclopedia of Life and IUCN Red List of threatened species.
What I did
I also programmed a REST-based Web service (public API) using PHP/MySQL/XML. This API is still in use as of 2020.