Senior Embedded Firmware Engineer

Senior Embedded Firmware Engineer

The Senior Embedded Firmware Engineer will be a key member of our development team, focusing on the design, development, and optimization of firmware for our cutting-edge wireless products. This role requires a deep understanding of embedded systems, particularly in the context of RF engineering and wireless protocols. The ideal candidate will have a strong background in embedded C, RF engineering, and wireless protocol expertise, with a focus on low-power wireless sensor networks and mesh networking.

Responsibilities

• Design, develop, and optimize firmware for embedded systems, particularly ARM Cortex-M microcontrollers.
• Collaborate with hardware engineers to ensure seamless integration of firmware with hardware components.
• Implement and optimize low-power firmware design for wireless sensor networks.
• Develop and maintain firmware update systems, including bootloaders and OTA updates.
• Troubleshoot and resolve firmware-related issues, ensuring high reliability and performance.
• Document firmware design decisions and maintain clear documentation for all firmware components.
• Participate in the design and implementation of custom protocol layers and RF coexistence strategies.
• Ensure firmware security by implementing secure boot, firmware signing, and encrypted OTA updates.
• Work closely with cross-functional teams to meet project deadlines and technical goals.

Requirements

• Strong experience with Embedded C (mandatory)
• Proficiency in bare-metal and RTOS-based firmware development
• Experience with ARM Cortex-M microcontrollers
• Knowledge of interrupt-driven architectures
• Familiarity with DMA, timers, watchdogs, GPIO, UART, SPI, I2C
• Experience with bootloaders and firmware update systems
• Proficiency in debugging with J-Link/SWD/GDB
• Experience with low-power firmware design
• Strong RF engineering knowledge, including antenna/layout awareness, RF sensitivity optimization, and link-budget analysis
• Experience with Z-Wave, proprietary sub-GHz protocols, mesh networking, and low-power wireless sensor networks
• Understanding of RF coexistence and OTA firmware updates over wireless
• Knowledge of secure boot, firmware signing, key provisioning, encrypted OTA updates, secure pairing/authentication, replay protection, and secure storage of credentials

• Experience with Silicon Labs wireless SDKs, Simplicity Studio, and Silicon Labs Gecko SDK
• Familiarity with Z-Wave 700/800 series, SmartStart, S2 security, OTA DFU mechanisms, Zniffer packet analysis, and PTI packet tracing
• Experience implementing custom protocol layers and modifying MAC/PHY behavior
• Strong understanding of modular firmware architecture, state-machine design, and event-driven systems
• Experience with Git workflows, CI/CD for firmware, and automated testing
• Ability to create and maintain hardware abstraction layers
• Excellent documentation discipline

``` This job description is designed to attract experienced Senior Embedded Firmware Engineers who can contribute to the development of advanced wireless products with a focus on low-power, secure, and efficient firmware solutions.