The document provides an overview of the technical infrastructure for the 3TU Datacentrum Back-end. It describes the Fedora repository software used for the institutional repository, Python middleware using Django and coupling to Fedora via its REST API, and an XSLT-based Fedora front-end with dynamic queries. It also discusses two types of datasets ingested - archival submissions recorded as-is for reference, and enriched objects which may be converted to other formats and have selected metadata stored in the resource index. Current datasets in the repository are listed.