Senior Systems Software Development Engineer

At Sonos we want to create the ultimate listening experience for our customers and know that it starts by listening to each other. As part of the Sonos team, you’ll collaborate with people of all styles, skill sets, and backgrounds to realize our vision while fostering a community where everyone feels included and empowered to do the best work of their lives.* Design and implement real-time system software architectures leveraging SMP (symmetric multiprocessing) and AMP (asymmetric multiprocessing) approaches for embedded audio systems* Bring up, debug, and maintain bootloader (U-Boot) and embedded Linux across new hardware platforms.* Lead early board bring-up and debug of new PCBs using ARM SoCs, WiSoCs, BT SoCs, and microcontrollers.* Develop and maintain Linux kernel drivers across a wide range of subsystems, interfaces, and peripherals.* Own and evolve the HDMI software stack, including: + Video path integration + ARC/eARC + CEC + Userspace interfaces supporting the audio/product pipeline* Integrate vendor SDKs, BSP components, and OS modules into the build and release process* Develop and maintain HAL libraries enabling clean, testable interfaces between hardware and user space.* Identify platform gaps relative to hardware capabilities and product requirements; propose and deliver improvements to enable faster prototyping and evaluation of new hardware.* Contribute to BSP validation and system-level debugging across HW/SW boundaries.* Define, execute, and document unit and integration testing for system software components.* Partner with silicon and component vendors to coordinate support and resolve platform issues across CPU/radio SoCs, MCU/PIC, NPU/GPU, and peripheral devices.* Support hardware engineering teams with deep technical debugging and contribute to OS/platform modernization efforts.* Bachelor’s in Computer Engineering, Electrical Engineering, Computer Science or related field* At least 5 years of professional experience developing firmware/system software for embedded systems* Strong proficiency in C/C++* Significant experience with embedded Linux, kernel internals, and device driver development.* Experience bringing up and debugging systems using U-Boot and common boot flows.* Experience with toolchain and debug tooling (e.g., gcc, binutils, gdb).* Experience designing and developing software/firmware using Free-RTOS as developing bare-metal applications for microcontrollers* Strong debugging capability using tools such as JTAG, logic analyzers, and oscilloscopes.* Proven ability to build performance-critical software in resource-constrained environments (e.g., high-speed peripheral drivers).* Proficiency with Yocto Project / OpenEmbedded workflows.* Strong understanding of Linux execution contexts and concurrency, including locking/mutexes, SMP behavior, and kernel/user boundaries.* Familiarity with key interfaces/protocols such as: + DDR, NAND, PCIe, Ethernet, USB + SPI, I2C, UART, I2S + TCP/IP, Wi-Fi (802.11), Bluetooth/BLE* Proficiency in Python* Experience with the HDMI subsystem (Video, ARC/eARC, CEC).* Prior hardware design exposure and ability to read schematics/datasheets.* Familiarity for low-level optimization and performance tuning.* Familiarity with USBPD and development experience in USB PD ICs* Experience working in Agile development environments.We also offer a comprehensive with choice and flexibility in mind to help support the health, wealth, and overall well-being of our employees. Regular full time employees in the US are eligible for benefits on day one, including:* Medical, Dental, and Vision Insurance* A 401(k) plan with company matching and immediate vesting* An Open Time Off policy (OTO) so you have maximum opportunity to disconnect and recharge, with no tenure-based vacation accruals required* 80 hours of sick time upon hire, refreshed annually* Up to 12 paid holidays per calendar year* Sonos offers a generous paid leave program for new parents or to care for a family member with a serious health condition, as well as short- and long-term disability for your own medical condition* Company-paid Disability, Life, and AD&D Insurance* Voluntary benefits, including Voluntary Life, AD&D, Accident, and Pet Insurance* Mental health benefits to support your holistic well-being* A generous employee discount program & Sonos Radio HD - on us!Sonos is a sound experience company. We connect millions of listeners all around the world to the content they want, where and how they want it. Since inventing multiroom wireless audio in 2005, we have continuously innovated the listening experience, designing hardware and software that celebrates sound, empowers our customers, and brings the home to life. Our team is made up of passionate players united by a culture of respect, transparency, collaboration, and ownership who want to inspire the world to listen better. #J-18808-Ljbffr Sonos LLC