Simple session analysis tool

Hi, I need a developer to build a very simple analytics tool for me. The tool will connect to user website via JavaScript that the website owners/moble app owners will add to their website/app, and that tool will provide session analysis, and user behavior data on the website or mobile apps that they own. I can provide more details in discussion. You can use rrweb or similar, and for apps we'll focus only on flutter apps for now. Thanks