MyScienceWork has released in March 2018 the new open source solution Polaris OS, which seeks to find appropriate solutions to major challenges of open repositories. It was first implemented together with the French Institute for Demographic Studies (INED), in the framework of an institutional open repository (IOR) project carried out from September 2017 to July 2018. In our talk we will present the features and services of Polaris OS, by using the case study of the IOR developed with INED. Our presentation will focus on three major topics: 1) Development process: we will show how inputs/feed-backs from the INED project team and researchers have helped to develop the general architecture, features and services of the technical solution, and allowed for a customized configuration to meet the specific needs of INED users. 2) User-centered design and services of the IOR: we will present and give a short demonstration of the customized tools/services implemented so far for different kinds of users (researchers, data analysts, librarians, repository managers…). 3) Outlook of the new repository solution: We will give an overview of future user involvement and development of the Polaris OS solution (user group/community; new services and features…).