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You are interested in the position as Senior Firmware Developer — Smartcard & Mobile Credentials (m/f/d) at SimonsVoss Technologies GmbH ? Create your profile in under 3 minutes and start the application process with just a few clicks. Please note that this position requires work authorization for Germany .
The language requirements for this position are: German - Conversational, English - Fluent . As a Senior Firmware Developer , you will design and implement C++ application firmware on microcontrollers (ARM Cortex-M) running an RTOS.
Your focus will be on application-level features and the integration of physical and smartphone-based credential processing flows (Mifare DESFire, HCE, mobile wallets). Activities Implement C++ application-layer firmware on an RTOS (tasking, IPC, power-aware scheduling).
Develop application logic for existing (Mifare DESFire) and future standards: app/file model, access conditions, personalization, and lifecycle management. Integrate NFC/BLE/WLAN stacks and mobile credential workflows (provisioning, HCE, revocation). Interface with secure elements / SAMs for key storage and transaction offload.
Implement secure boot, signed/encrypted OTA, and application-level runtime protections. Enhance and maintain internal software suites (C++, C#). Build tests and CI/CD artifacts; use protocol sniffers and hardware debuggers for validation. Work closely with mobile, backend, har
