JuliaCall Python library - is it safe for server use

I am using Flask and Nginx for a simple stats project. The usecase is that my front end invites the user to upload a spreadsheet. The back end uses Julia. I call Julia using Python JuliaCall. Is this way of doing things “safe”? Or does JuliaCall leave sensitive stuff lying around or have big security flaws? Seems okay to me. But I don’t know much yet. Thanks.