{"id":774923,"url":"https://alion.io/job/sonos-senior-systems-software-development-engineer","title":"Senior Systems Software Development Engineer","company":{"id":3723,"name":"Sonos","domain":"sonos.com","url":"https://alion.io/company/sonos","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":80,"open_postings":10,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":26,"computed_at":"2026-10-31T05:58:55Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Boston, United States","Seattle, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":138000,"max_usd":257000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":3667},"experience_years_min":5,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"U-Boot","optional":false},{"name":"Agile","optional":true},{"name":"C","optional":true},{"name":"FreeRTOS","optional":true},{"name":"TCP/IP","optional":true},{"name":"Wi-Fi","optional":true}],"status":"live","first_seen_at":"2026-09-11T22:39:24Z","employer_posted_date":"2026-09-11","last_verified_at":"2026-10-30T20:24:44Z","board_verified":true,"closed_at":null,"days_open":49,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":49},"description":"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.\nLocation: This is a hybrid role, based in either our Boston, MA, or Seattle, WA Sonos Office in office 4x/week. #LI-Hybrid\nVisa Sponsorship: Sonos is unable to sponsor or take over sponsorship of an employment visa for this role at this time. We ask that applicants be authorized to work for any US employer, both now and in the future.\nAt 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.\nWhat You’ll Do:\nDesign and implement real-time system software architectures leveraging SMP (symmetric multiprocessing) and AMP (asymmetric multiprocessing) approaches for embedded audio systems\n\nBring up, debug, and maintain bootloader (U-Boot) and embedded Linux across new hardware platforms.\n\nLead early board bring-up and debug of new PCBs using ARM SoCs, WiSoCs, BT SoCs, and microcontrollers.\n\nIntegrate vendor SDKs, BSP components, and OS modules into the build and release process\n\nDevelop and maintain HAL libraries enabling clean, testable interfaces between hardware and user space.\n\nIdentify platform gaps relative to hardware capabilities and product requirements; propose and deliver improvements to enable faster prototyping and evaluation of new hardware.\n\nContribute to BSP validation and system-level debugging across HW/SW boundaries.\n\nDefine, execute, and document unit and integration testing for system software components.\n\nPartner with silicon and component vendors to coordinate support and resolve platform issues across CPU/radio SoCs, MCU/PIC, NPU/GPU, and peripheral devices.\n\nSupport hardware engineering teams with deep technical debugging and contribute to OS/platform modernization efforts.\n\nWhat You’ll Need\nBasic Qualifications:\nBachelor’s in Computer Engineering, Electrical Engineering, Computer Science or related field\n\nAt least 5 years of professional experience developing firmware/system software for embedded systems\n\nStrong proficiency in C/C++ (Python is a plus).\n\nSignificant experience with embedded Linux, kernel internals, and device driver development.\n\nExperience bringing up and debugging systems using U-Boot and common boot flows.\n\nPreferred Qualifications:\nExperience with the HDMI subsystem (Video, ARC/eARC, CEC).\n\nPrior hardware design exposure and ability to read schematics/datasheets.\n\nFamiliarity for low-level optimization and performance tuning.\n\nFamiliarity with USBPD and development experience in USB PD ICs\n\nExperience working in Agile development environments.\n\nExperience with toolchain and debug tooling (e.g., gcc, binutils, gdb).\n\nExperience designing and developing software/firmware using Free-RTOS as developing bare-metal applications for microcontrollers\n\nStrong debugging capability using tools such as JTAG, logic analyzers, and oscilloscopes.\n\nProven ability to build performance-critical software in resource-constrained environments (e.g., high-speed peripheral drivers).\n\nProficiency with Yocto Project / OpenEmbedded workflows.\n\nStrong understanding of Linux execution contexts and concurrency, including locking/mutexes, SMP behavior, and kernel/user boundaries.\n\nFamiliarity with key interfaces/protocols such as:\nDDR, NAND, PCIe, Ethernet, USB\n\nSPI, I2C, UART, I2S\n\nTCP/IP, Wi-Fi (802.11), Bluetooth/BLE\n\nYour profile will be reviewed and you'll hear from us once we have an update. At Sonos we take the time to hire right and appreciate your patience.\nThe base pay range for this role based off geographic location is:\nThe specific pay offered will depend on the candidate’s geographic location, as well as qualifications and experience. We apply geographic pay differentials based on the cost of labor in the market. Employees in high-cost locations may be compensated at the upper end of the range, while those in medium or low cost markets may be compensated at the lower end of the range. Your recruiter can provide more details about the specific salary range for your location during the hiring process.\nPlease note that compensation details listed in US job postings reflect the base salary only, and do not include bonus, equity, or benefits.\nWe also offer a comprehensive benefits program 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:\nMedical, Dental, and Vision Insurance\n\nA 401(k) plan with company matching and immediate vesting\n\nAn Open Time Off policy (OTO) so you have maximum opportunity to disconnect and recharge, with no tenure-based vacation accruals required\n\n80 hours of sick time upon hire, refreshed annually\n\nUp to 12 paid holidays per calendar year\n\nSonos 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\n\nCompany-paid Disability, Life, and AD&D Insurance\n\nVoluntary benefits, including Voluntary Life, AD&D, Accident, and Pet Insurance\n\nMental health benefits to support your holistic well-being\n\nA generous employee discount program & Sonos Radio HD - on us!\n\nNote: No amount of pay is considered to be wages or compensation until such amount is earned, vested, and determinable. The amount and availability of any bonus, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company’s sole discretion, consistent with the law.\nNotice to U.S. Job Applicants: Sonos is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics.\nSonos is committed to working with and providing reasonable accommodations to individuals with disabilities. If you need a reasonable accommodation because of a disability for any part of the employment process, please send an e-mail to  and let us know the nature of your request and your contact information.","description_format":"text","description_chars":6751,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Vision insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Headphones & Audio","Smart Speakers","Home Cinema"],"lifecycle":[{"event":"open","at":"2026-09-11T22:39:24Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 25 · green card filings: 9","filings_12m":25,"filings_prev_12m":26,"green_card_filings_12m":9,"median_offered_wage_usd":133824,"route":null,"cap_exempt":false,"checked_at":"2026-10-29T16:27:21+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":12}],"liveness":{"score":21,"band":"cold","label":"Long shot","p_open":1,"p_active":0.474,"p_room":0.45,"age_days":49,"expected_fill_days":26,"reasons":["conf:9","stale_co","velocity","win:tail"],"computed_at":"2026-10-31T05:58:55Z"},"pay":null,"html_url":"https://alion.io/job/sonos-senior-systems-software-development-engineer","json_url":"https://alion.io/job/sonos-senior-systems-software-development-engineer.json","meta":{"generated_at":"2026-10-31T06:42:56Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":9900,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-01T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":3723},"rest":"https://alion.io/mcp/rest/get_company?id=3723"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsonos-senior-systems-software-development-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fsonos-senior-systems-software-development-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fsonos-senior-systems-software-development-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/sonos-senior-systems-software-development-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsonos-senior-systems-software-development-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":774923}},{"tool":"search_jobs","arguments":{"company":"sonos.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":774923},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. Docs: https://alion.io/developers"}}