Firmware Developer

Role & responsibilities

Key Responsibilities: 1. Embedded Linux Development: a. Develop, maintain, and optimize embedded Linux firmware for ARM-based platforms (Cortex-A). b. Customize bootloaders (e.g., U-Boot), kernel configurations, and device tree overlays. c. Develop system services, daemons, and user-space applications using C/C++ and shell scripting. d. Integrate drivers for peripherals (UART, SPI, I2C, GPIO, CAN, Ethernet, USB, etc.). 2. Security Implementation: a. Implement secure boot, firmware signing, and encryption for secure update mechanisms. b. Develop or integrate security protocols: TLS/SSL, DTLS, AES, ECC, RSA, SHA. c. Handle Linux security features such as SELinux, AppArmor, sandboxing, and secure user permission models d. Work with TPM (Trusted Platform Module), secure elements, and HSMs where applicable. 3. Security Implementation and Role-Based Access Control: a. Implement role-based access control (RBAC) for system services, web interfaces, and remote access. b. Develop secure boot processes, encrypted firmware updates, and hardware-backed key storage. c. Utilize Linux security mechanisms (SELinux, AppArmor) and system hardening techniques. d. Integrate cryptographic protocols: TLS/SSL, AES, RSA, ECC, SHA for secure communication. e. Work with TPM (Trusted Platform Module), secure elements, and HSMs where applicable 4. System Integration & Testing: a. Collaborate with hardware, QA, and cloud teams to ensure system-level integration and performance. b. Use debugging tools such as gdb, strace, tcpdump, JTAG, and oscilloscopes. c. Develop and run automated test scripts for regression and stress testing. 5. Documentation & Support: a. Maintain thorough documentation of firmware architecture, interfaces, APIs, and security mechanisms b. Participate in code reviews and maintain best practices for secure coding c. Provide post-deployment support including diagnostics, performance analysis, and security patching. Required Qualifications and Experience: Bachelors or Master’s degree in Electronics, Computer Science, or a related field. 3+ years of experience in embedded Linux firmware development. Strong C/C++ programming skills with a good understanding of Linux internals. Experience with embedded Linux build systems (Yocto, Buildroot). Hands-on experience with implementing security features in embedded systems. Knowledge of networking and communication protocols (TCP/IP, MQTT, Modbus, etc.). Implement industrial protocols such as MODBUS RTU/TCP, DNP3, or IEC 104 for SCADA connectivity.Handle data mapping, polling, and real-time event handling for control center integration. Optimize communication stacks for reliability and security in harsh or remote environments. Preferred Skills: Experience with secure OTA (over-the-air) updates and bootloaders. Familiarity with containers on embedded Linux (e.g., Docker, Podman). Exposure to cybersecurity standards (e.g., IEC 62443, ISO 27001, NIST). Familiarity with CI/CD for firmware using tools like GitLab CI, Jenkins, or similar. Scripting skills (Python, Bash) for automation and testing