Senior Engineer - SW Design (RAIL)

Job Title

Senior Engineer - SW Design (RAIL)

Role Summary

Develop foundational embedded software for Silicon Labs wireless MCUs and the RAIL SDK, enabling customers to build reliable, low-power wireless products. The role involves working close to hardware and collaborating with firmware, silicon, systems, and test teams.

Owner of low-level firmware components from design through release, with a focus on performance, power efficiency, and system reliability.

Experience Level

Senior - 5+ years professional experience in embedded software or firmware development.

Responsibilities

Primary responsibilities on the RAIL team include development, verification, and long-term support of low-level embedded software for wireless systems.

• Design, develop, and maintain embedded software for low-power wireless MCUs and SDKs.
• Own hardware feature support across the IC lifecycle: design, pre-silicon verification, post-silicon bring-up, release, and long-term support.
• Implement and enhance device drivers, initialization/startup code, timing-sensitive system software, and radio control features.
• Optimize software for performance, power efficiency, memory, and CPU usage in real-time environments.
• Debug complex issues across software, firmware, and hardware using lab tools and debuggers.
• Collaborate with hardware, silicon, systems, and product teams to define requirements and support device bring-up.
• Contribute to automated tests, validation, and development tooling to improve quality and efficiency.
• Participate in code and design reviews and mentor other engineers.

Requirements

Must-have technical skills and experience.

• 5+ years of professional experience in embedded software or firmware development.
• Strong programming skills in Embedded C and/or C++.
• Experience developing software for microcontrollers in resource-constrained, real-time environments (bare metal and/or RTOS).
• Strong debugging skills at the hardware/software boundary; hands-on experience with debuggers, JTAG/SWD, oscilloscopes, or logic analyzers.
• Experience with low-level embedded software: device drivers, interrupts, peripheral interfaces, timing-sensitive code, and memory-constrained systems.
• Proven ability to take features from design through implementation, test, and release.
• Strong problem-solving, communication, and collaboration skills.

Nice-to-have (preferred):

• Experience with wireless technologies (Bluetooth LE, Zigbee, Thread, Wi‑Fi, or proprietary radios) and PHY/MAC or radio control software.
• Experience optimizing systems for low power, performance, and reliability.
• Familiarity with common embedded interfaces (SPI, I2C, UART, DMA, timers) and silicon bring-up or hardware validation.
• Experience with Python or similar scripting for tooling, automation, testing, CI, and validation frameworks or hardware-in-the-loop tests.
• Experience with multi-core MCUs, concurrency, and low-level assembly on ARM/RISC‑V or similar architectures.
• Familiarity with AI-assisted development tools for prototyping, automation, and debugging while applying strong engineering judgment.

Education Requirements

BS or MS in Electrical Engineering, Computer Engineering, Computer Science, or a related field - or equivalent practical experience.

About the Company

Company: Silicon Labs

Headquarters: Austin, Texas, USA

Silicon Labs is a leading innovator in low-power wireless connectivity, creating embedded technology that connects devices to improve lives. With a focus on advanced edge connectivity applications, the company provides device makers with cutting-edge solutions and support. Headquartered in Austin, Texas, Silicon Labs operates in over 16 countries, serving markets such as smart home, industrial IoT, and smart cities.