Activities bring people together. The backend connects the experience.
An activity-based social application with attendance workflows, profiles, following, and live discussion, built with ASP.NET Core and React.
Feature relationship illustration based on the repository; this is not a product screenshot.ENGINEERING CASE STUDY
Actify is an activity-based social application: users can discover and create activities, manage attendance, follow people, maintain profiles, and join live discussions.
I built it as a course-based full-stack project while studying the Complete Guide to Building an App with .NET Core and React. It gave me a focused setting to connect backend use cases to a real React interface.
The attendance use case distinguishes the host from other attendees. A host can toggle cancellation; an attendee can leave; a new participant can join. One workflow represents three different user intentions.
Explore the implementationThe comment hub joins each connection to its activity group, loads existing comments for the caller, and broadcasts new comments to that activity. The React hook manages the client connection and updates observable comment state.
Explore the implementationApplication commands and queries express the backend use cases. React feature folders and dedicated hooks connect activities, accounts, and profiles to those endpoints, while shared components provide common form and navigation behavior.
Explore the implementationThis excerpt shows how the hub routes a new discussion comment through the application layer, then broadcasts the returned comment to its activity group.
var comment = await mediator.Send(
new AddComment.Command {
CreateCommentDto = createCommentDto
});
await Clients.Group(createCommentDto.ActivityId)
.SendAsync("ReceiveComment", comment.Value);Actify helped me connect backend concerns to the user experience: an attendance update changes what a participant sees, and a live comment has a connection lifecycle as well as a persistence path.
It was a learning project. The next iteration would focus on integration tests around attendance changes and on verifying discussion access at the activity boundary.
I’m open to junior .NET backend and software engineering opportunities. Have a role or a problem in mind? I’d love to hear about it.