Embedded Software Engineer III

SiOnyx, LLC is seeking an Embedded Software Engineer III to design, develop, and optimize software for imaging sensor systems. The role requires strong expertise in C/C++, Python, FPGA, RTOS, and real-time video pipelines, along with the ability to provide technical leadership across engineering teams and customer engagements. This is an onsite position located in Goleta, California.

Responsibilities

• Collaborate with software, hardware, systems, and optical engineering teams to deliver fully integrated solutions.
• Develop and expand the capability to design and integrate software tools and functions.
• Develop and maintain embedded Linux software for ARM-based SoCs supporting real-time video pipelines.
• Implement and optimize drivers, middleware, and APIs for interfaces such as Ethernet/PoE, HDMI, USB, Wi-Fi/Bluetooth, and serial buses (I2C, SPI, UART).
• Support board bring-up, BSP customization, bootloader configuration, and AMP proprietary video pipeline software integration.
• Collaborate with hardware teams to ensure seamless integration across subsystems.
• Debug hardware/software integration issues using JTAG, oscilloscopes, logic analyzers, and protocol analyzers.
• Perform root-cause analysis of complex integration issues.
• Document designs, create test harnesses, and conduct structured design reviews.
• Assist in defining and executing system-level verification and validation plans.
• Provide technical leadership and mentorship to junior engineers.
• Serve as a subject matter expert in imaging system design during customer engagements, proposals, and reviews.
• Support the product lifecycle from concept through production, ensuring field-proven reliability and manufacturability.
• Engage with customers and product teams to define requirements and translate them into flow-down requirements for subsystems and development teams.
• Undertake other duties as assigned.

Requirements

• Bachelor’s or master’s degree in Electrical Engineering, Systems Engineering, Physics, Computer Science, or a related field (PhD a plus).
• 5+ years of embedded software or firmware development experience.
• Proficient in C/C++ for embedded systems.
• Familiarity with low-light imaging, NIR/IR systems, or high-performance CMOS sensor technologies.
• Strong experience with microcontrollers, SoCs, and FPGA-based systems in real-time environments.
• Demonstrated success in hardware/software integration and debugging with industry-standard tools.
• Deep knowledge of communication protocols (I2C, SPI, UART, USB, Ethernet).
• Proven ability to deliver reliable, optimized embedded solutions for power- and performance-constrained systems.
• Experience working in cross-disciplinary teams and in fast-paced environments.
• Excellent problem-solving, communication, and customer-facing skills.
• US citizenship or green card holder required.

Technologies

• C, C++, Python
• FPGA, RTOS, Embedded Linux
• ARM-based SoCs, I2C, SPI, UART, Ethernet
• PoE, HDMI, USB, Wi-Fi, Bluetooth
• JTAG, oscilloscopes, logic analyzers, protocol analyzers
• CMOS sensor technologies, low-light imaging, NIR/IR imaging
• Real-time video pipelines

Benefits

• 401(k)
• 401(k) 4% Match
• Dental insurance
• Employee assistance program
• Employee discount
• Flexible spending account
• Health insurance
• Life insurance
• Paid parental leave
• Paid time off
• Professional development assistance
• Referral program
• Vision insurance

Compensation

Salary range: USD 125,000 – 145,000 per year. Discretionary bonus: 7.5 to 10 percent.

Physical requirements

• Prolonged periods sitting at a desk and working on a computer.
• Must be able to lift up to 25 pounds at a time.

Application questions

• Are you a US Citizen or Green Card Holder?

Location and commute

Location: Goleta, CA 93117. This is an onsite, in-person role requiring physical presence in Goleta, California.