Embedded Software Engineer

Ezurio is seeking an Embedded Software Engineer to develop and support wireless connectivity software. The role focuses on Wi-Fi radio firmware, Linux drivers, RTOS development, hardware/software debugging, testing, customer collaboration, and technical documentation.

Responsibilities:

• Design, develop, and maintain firmware for Wi-Fi radio subsystems, including MAC/PHY interfacing, calibration routines, and channel/RF management
• Bring up Wi-Fi silicon on new hardware platforms: port and validate vendor SDKs, drivers, and radio calibration data for new designs
• Develop and maintain radio firmware within an RTOS environment (e.g., ThreadX or similar) and host-side Wi-Fi drivers under Linux, with real-time scheduling, interrupt handling, and register-level access to radio and host interfaces (SDIO, PCIe, USB, DMA)
• Write clean, well-documented, testable code following Ezurio coding standards and secure development practices
• Support 802.11 protocol-layer behavior (association, authentication, power-save, rate adaptation) and power management/wake-on-wireless design in coordination with vendor stacks
• Debug complex RF firmware issues using tools such on hardware where on-device debug access (e.g., JTAG/debug ports) is limited, using debug output, code analysis, logic analyzers, oscilloscopes, and Wi-Fi packet capture tools (e.g., Wireshark) and JTAG/SWD
• Develop and execute unit, functional, integration, and system-level tests; work with SWQA teams to contribute to test infrastructure and CI/CD pipelines
• Reproduce, isolate, and resolve field and customer-reported Wi-Fi issues (throughput, roaming, association drops, coexistence) and drive issues to root cause and closure
• Participate in code reviews and enforce quality gates across the software development lifecycle
• Partner with the RF hardware team (USA and Taiwan) during schematic review, antenna design, and prototype bring-up to flag firmware-relevant design considerations early
• Work directly with customers and program managers to clarify Wi-Fi firmware requirements, scope, and acceptance criteria for co-development programs
• Support manufacturing, NPI, and DVT/PVT activities with RF test tools, calibration procedures, and production-line firmware as needed
• Provide clear technical status updates to program managers and contribute to schedule and risk discussions
• Produce and maintain technical documentation: design specifications, API references, porting guides, and release notes
• Maintain source control hygiene, branching strategy, and release/versioning discipline across active programs
• Contribute to the continuous improvement of embedded software development practices within the Custom SOM & SBC group

Requirements:

• Strong proficiency in C working in embedded, memory-constrained, real-time systems
• Solid understanding of processor architecture, memory management, and real-time constraints in embedded systems and working with register access
• Proven debugging skills across the hardware/software boundary, using debug output, JTAG/SWD, oscilloscopes, logic analyzers, and ideally Wi-Fi packet capture tools
• Demonstrated persistence and rigor in debugging and driving issues to true root cause rather than applying surface-level fixes
• Ability to read schematics and datasheets, and to communicate effectively with RF hardware engineers on radio and interface details
• Strong written and verbal communication skills; comfortable presenting technical status to customers and internal stakeholders
• Effective collaborator in a fast-paced, globally distributed team environment (coordinating with the RF hardware team in the USA and Taiwan), able to manage multiple concurrent programs
• Ideally hand-on RTOS experience: task scheduling, interrupt handling, and priority management in a resource-constrained system. Note that specific RTOS experience e.g. ThreadX, Zephyr, or similar matters less than a working understanding of RTOS concepts and real hands-on time in one
• Working knowledge of version control (Git), CI/CD pipelines, and issue tracking tools such as Jira
• Bachelor's degree in Computer Engineering, Computer Science, Electrical Engineering, or a related technical field. Equivalent professional experience considered in lieu of degree
• 5+ years of embedded software or firmware development experience in an electronics design and manufacturing environment
• Legal authorization to work in the US is required
• Working knowledge of Linux (kernel modules, device drivers, kernel/user-space interfaces) is a plus, since our Wi-Fi drivers run under Linux
• Experience with host interfaces such as SDIO, PCIe, or USB is most relevant; familiarity with SPI, I2C, and UART is also useful
• Exposure to 802.11 MAC-layer concepts (association, authentication, power-save, rate adaptation) is a plus; we will train a strong embedded/RTOS candidate who doesn't yet have this
• Chipset vendor SDK exposure is a plus: Cypress/Infineon, NXP, Qualcomm/Atheros (QCA) or similar Wi-Fi silicon vendors
• Familiarity with RF/PHY concepts (calibration, gain control, channel switching) is a plus
• Prior experience with another wireless or networking protocol stacks e.g. Bluetooth, Zigbee, Thread, Cellular is valuable even without direct Wi-Fi background
• Power management firmware experience (sleep states, wake-on-wireless) is a plus, especially for battery-powered or IoT platforms
• Direct experience with Wi-Fi or other wireless radio firmware/driver bring-up is strongly preferred; we will train a strong embedded/RTOS candidate without direct Wi-Fi background
• Experience supporting customer co-development programs (NRE-based or joint development agreements) is a plus
• Experience with wireless certification, RF coexistence, or low-power design considerations is a plus
• This role is preferably based in hybrid work arrangement in Akron, Ohio