MassiveLive brings staffing, venue coordination, and field communications together for organisations delivering large-scale live events. A central web workspace and an Android field app connect administrators, supervisors, and on-site teams. Supervisors can follow opt-in live GPS positions, receive SOS alerts with the last-known location, and coordinate staff through direct chat and photo attachments. Targeted event information and a shared photo-documentation gallery keep operational details close to the people who need them. Built with ASP.NET Core and .NET MAUI, the platform supports multiple customers and venues, role-based access, isolated customer data, and configurable policies. It gives event operators a consistent foundation for planning, communication, and on-site oversight.