Develop and maintain C firmware for embedded RFID reader platforms in a bare-metal environment. Integrate RFID and authentication credentials, implement wired and wireless communication interfaces, debug firmware on target hardware, and maintain drivers, middleware, and application modules. Develop unit and integration tests using C#, Python, and other tools. Define secure authentication and credential-handling concepts, improve embedded product security, and support compliance with the European Cyber Resilience Act.

Design and define embedded hardware architecture for RFID and access-control products. Specify RF and interface front-ends, MCU and secure element selection, PCB and power design, EMC/EMI and signal-integrity requirements, and lifecycle strategies. Collaborate with firmware, QA, product management, and suppliers to deliver secure, manufacturable hardware platforms.