We are looking for a highly skilled developer to implement a critical feature in our app: an interactive camera with animated halos tied to precise geographic locations (latitude & longitude). Key Responsibilities: 1. Develop the camera interface where users can long-press, upload media (photo/video), and launch animated halos. 2. Implement location selection (countries + cities) with precise latitude & longitude mapping. 3. Ensure halos are animated and visible in real-time to other users in the correct locations. 4. Handle front-end (app interface) and back-end logic for storing, launching, and updating halos accurately. 5. Maintain high accuracy and performance for location-based interactions. Requirements: • Strong experience with maps, geolocation, and coordinate systems. • Proficient in both front-end and back-end development (mobile apps + server integration). • Able to deliver clean, professional, and maintainable code. • Experience with real-time updates and interactive elements is a plus.