Senior Engineer - SW Design (RAIL)

Job Title

Senior Engineer - SW Design (RAIL)

Role Summary

Develop and maintain low-level embedded software for the RAIL SDK to enable reliable, power-efficient wireless products on Silicon Labs devices. Collaborate with silicon, hardware, firmware, systems, and test teams to deliver features from design through verification, release, and long-term support.

Work focuses on resource-constrained, real-time systems and optimizing performance, power, and reliability for IoT applications.

Experience Level

Senior-level — typically 5+ years of professional experience in embedded software or firmware development.

Responsibilities

Primary responsibilities include:

• Design, implement, and maintain embedded firmware for low-power wireless microcontrollers and SDKs.
• Support hardware features across the IC lifecycle: design, pre-silicon verification, post-silicon bring-up, release, and long-term maintenance.
• Develop and enhance low-level components such as device drivers, initialization/startup code, timing-sensitive system software, and radio control features.
• Optimize software for performance, reliability, power efficiency, and memory/CPU utilization in real-time environments.
• Debug complex issues across software, firmware, hardware, and system boundaries using lab tools and debuggers.
• Collaborate with product, silicon, hardware, and test teams on requirements, design reviews, and device bring-up.
• Contribute to automated test, validation, and development tooling to improve product quality and engineering efficiency.
• Participate in code and design reviews and mentor other engineers.

Requirements

Must-have:

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

Nice-to-have:

• Experience with wireless technologies (Bluetooth LE, Zigbee, Thread, Wi‑Fi, or proprietary radios) and PHY/MAC or radio control software.
• Experience optimizing for low power, performance, and reliability; silicon bring-up or hardware validation experience.
• Familiarity with common embedded interfaces (SPI, I2C, UART, DMA, timers) and multi-core concurrency challenges.
• Experience with Python for tooling/automation, CI/validation frameworks, hardware-in-the-loop testing, or assembly on ARM/RISC‑V.
• Practical use of AI-assisted development tools for prototyping, test development, or automation, with sound engineering judgment.

Education Requirements

BS or MS in Electrical Engineering, Computer Engineering, Computer Science, or a related technical 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.