Hi there,
Based on the one liner requirement, I am assuming that you are looking for an app. Though you have not mentioned about any specific platform, I may suggest you go with Hybrid app route.
I am well experienced in developing cross platform - android, ios, windows hybrid apps using Ionic framework. I have recently delivered an app to LDS church with the stack: Ionic 2, Angular 2, Node, and Firebase. It has got the modules: User management, Meeting Schedules, Task Management, Group/Individual Chat and File uploads with sharing. Hope these functionalities would suit you as well. Please get in touch for further details.
Below is the glimpse of my experience:
I have got 10+ years of web and mobile application development. Expertise in design and development of enterprise applications. Worked in multiple domains: Healthcare, telecom, manufacturing, corgo, mining, construction. Some of the Fortune listed clients I have worked with: Dignity Health, Kiewit, Rio Tinto, Etisalat, Valmont, Cosco Marine Engineering.