Senior Embedded Software Developer (Battery Management System)

ABOUT THE PROJECT

We are looking for a skilled and passionate Senior Embedded Software Developer to join our team and contribute to a high-reliability firmware update system for a dual-core STM32H7-based Smart Battery Management System (SBMS).

YOUR ROLE

• Design and implement dual-core bootloader logic for STM32H755 microcontroller;
• Develop robust staging, validation, and recovery mechanisms for firmware updates across Cortex-M7 and Cortex-M4 cores;
• Harden SSH and sFTP interfaces for secure firmware update triggers and file transfers;
• Integrate cryptographic libraries into embedded systems with TLS-secured communication over Ethernet;
• Contribute to fallback logic and anti-rollback protection in line with UL 5500 safety and cybersecurity requirements;
• Develop and verify firmware  validation mechanisms;
• Participate in memory map design;
• Collaborate with QA to simulate and validate update failure scenarios (e.g., mid-copy reset, corrupt image);
• Implement CLI interactions triggered over SSH for staging and activating updates;
• Support adaptation to proprietary hardware and alternative STM32H7 package variants;
• Write maintainable, well-documented, safety-critical embedded C code;
• Participate in design reviews and deliver certification-traceable documentation;
• Assist in defining cryptographic configurations and secure boot strategies;
• Collaborate with cross-functional teams (architecture, QA, compliance) to ensure system-level reliability.

REQUIREMENTS

• B2+ level of English (verbal and written);
• 6+ years of experience with embedded systems development in C/C++;
• Proven experience on STM32 microcontrollers and STM32CubeIDE ecosystem;
• Strong understanding of Cortex-M architecture, dual-core boot processes, and inter-core coordination;
• Experience with memory protection, bootloader development, and firmware upgrade workflows;
• Practical experience with Ethernet communication using embedded TCP/IP stacks (preferably CycloneTCP);
• Experience integrating TLS libraries such as mbedTLS into embedded targets;
• Familiarity with secure update requirements (e.g., UL 5500, FIPS 140-2, IEC 62443) is a strong plus;
• Hands-on experience with FAT filesystem access (e.g., from eMMC or SD storage) on embedded systems;
• Experience with firmware binary validation, checksum/hash functions (SHA, CRC);
• Experience with CMake, linker scripts, and embedded build tooling;
• Comfortable working with oscilloscopes, debuggers, JTAG/SWD tools for low-level bring-up.

NICE TO HAVE

• Experience with STM32H7 dual-core configuration (option bytes, vector table remapping, etc.);
• Knowledge of SSH key-based authentication and command restriction methods on embedded Linux targets;
• Knowledge of fallback boot strategies and watchdog integration;
• Familiarity with Python scripting for test automation or GUI development (e.g., for firmware packaging tools);
• Understanding of FAT/exFAT implementation constraints on eMMC/NAND storage;
• Experience supporting safety documentation and audit traceability for certification;
• Hands-on with test validation frameworks or coverage tools for embedded QA;
• Prior experience working with geographically distributed teams and hardware teams.