DameJidlo.cz, part of the global startup Delivery Hero, offers a list of restaurants that deliver food right to your door! We have prepared a complete functioning design, wireframe, and graphics for the new client application. With internal applications for couriers and restaurants we also focused on development and maintenance. We used Swift, Obj-C, and Java to develop the applications. The Firebase database was used for realtime functions. For a courier application, for example, it was necessary to inform the server about the courier’s current GPS position so that the nearest courier could handle the specific order. To do this, we use a background service that runs whenever the courier’s position changes.