Technology stack for developing a data driven web app

I'm currently in charge of designing and building a web app. Regarding the specifications I've decided to go on React and MobX with MongoDB. Knowing the fact that the choice of the technology stack is crucial, I want to discuss it with you. Feel free to give your advice.

So here is the main specs:

• The main function would be to do some effective search on some available data that would be available on an existing platform. For that I've planned to use ElasticSearch. Thus, it would be in communication with different existing API's and databases.
• It would also be possible to enrich the data by linking files, or any textual information.
• It would contain some team management functionalities and should be able to send notifications.

The reason I chose React and MongoDB is to have a reactive app with a nice and fluid user experience and a real time data management. Knowing the fact that it's clearly a data-driven app (import data, enrich it, export it to another database to perform effective search) I really think this is the stack I should use.