The Internet of Things is a global information society infrastructure that enables both physical and virtual interconnection of devices using current and future information and communication technologies. The number of devices connected to the Internet is growing significantly and the number of devices connected to the Internet exceeded the number of people by 2008. It is expected that by 2020 the number of devices connected to Internet will exceed the number of people in the ratio of four to one. To meet new needs and requirements brought by the Internet of Things, many new protocols have been developed that are optimized specifically for the Internet of Thing. Some of the most popular protocols used in the Internet of Things are MQTT, CoAP, XMPP, and AMQP, along with standard protocols like TCP, UDP, WebSocket and HTTP. Taking into consideration all of this, a system for device management in the Internet of Things has been developed. The system uses Firebase platform and thus avoids the need for dedicated server development. The Firebase platform has been used along with various Firebase tools and services, such as Firebase Cloud Firestore, Firebase Cloud Storage, Firebase Cloud Messaging, Firebase Cloud Functions and Firebase Authentication. Additionally, the system includes Raspberry Pi 3 Model B, running the Android Things operating system with the corresponding application and application for Android mobile devices.