Work in an international team. The R&D project focuses on communication and integration of devices with the cloud / IoT.Embedded software development includes, among others:• Creating software on the device that enables communication with the cloud – for example using MQTT, HTTP/REST, or WebSockets protocols.• Responsibility for collecting measurement data from the device, processing it, and sending it to the backend, as well as receiving remote commands.• Ensuring communication security, firmware protection, certificates, and encryption of data transmission.• Implementing consistent software updates for the device and the backend (embedded + cloud + front-end).Our expectations: Matlab/Simulink modeling, Model-based development ( Simulink ), Software requirements management ( Polarion ), Testing approaches: MIL/SIL, Simulink Test, Base C++ knowledge for integration, English or German proficiency, Hybrid work from Katowice 70/30 ; 70% from home; 30% from the office. Work starts with two weeks of onboarding at the headquarters in Germany. After that, you will travel there once every quarter for a week for planning sessions. Nice to have' Experience in IoT and heating systems ( heat pumps ), Agile developments experience. Main responsibilities: Create and refine control models for heating systems in Matlab/Simulink, Derive models for integration into C++ embedded platform, Define and manage software requirements in Polarion, Conduct MIL/SIL testing ( Simulink Test ) and integration test ( Robot Framework ), Work & collaborate in agile teams to meet sprint goals.