Senior Embedded Firmware Engineer Wireless Z

Job Summary Senior Embedded Firmware Engineer (Wireless & Z-Wave)

- Develop and maintain embedded firmware for wireless products, focusing on Z-Wave and proprietary sub-GHz protocols (using Embedded C for ARM Cortex-M platforms).
- Design, implement, and optimize low-power, interrupt-driven firmware for ARM Cortex-M microcontrollers, including DMA, timers, watchdogs, and communication protocols (UART, SPI, I2C, GPIO).
- Work with bare-metal and RTOS-based systems, including bootloaders and firmware update mechanisms (OTA updates).
- Debug and troubleshoot firmware and RF issues using tools such as J-Link, SWD, GDB, spectrum analyzers, and VNAs.
- Collaborate closely with hardware engineers on RF topics such as antenna layout, RF sensitivity, EMC/EMI issues, and FCC/CE certification processes.
- Implement and maintain wireless mesh networking, focusing on Z-Wave, low-power wireless sensor networks, and RF coexistence strategies.
- Utilize Silicon Labs platforms, including Simplicity Studio, Gecko SDK, and wireless stack APIs; work with Z-Wave 700/800 series, SmartStart, S2 security, and associated diagnostic tools (Zniffer, PTI).
- Incorporate robust security features such as secure boot, firmware signing, key provisioning, encrypted OTA updates, secure pairing/authentication, replay protection, and secure storage of credentials.
- Apply best practices in firmware architecture, using modular and event-driven design, state machines, automated testing, hardware abstraction layers, and disciplined documentation.
- Employ Git workflows and CI/CD pipelines for efficient, reliable firmware development and deployment.
- Communicate effectively, work independently, and document technical decisions while realistically assessing schedules and technical risks.
- Work onsite, Monday through Friday (9AM 5PM), in Indianapolis, IN, interfacing with cross-functional engineering teams.

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