{"id":3755909,"url":"https://alion.io/job/lightmatter-embedded-software-engineer","title":"Embedded Software Engineer","company":{"id":16141,"name":"Lightmatter","domain":"lightmatter.co","url":"https://alion.io/company/lightmatter-co","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":82,"open_postings":57,"ghost_share":0.298,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":43,"computed_at":"2026-11-05T05:54:30Z"}},"role":"Hardware","role_family":"Hardware","seniority":"junior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Boston, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":125000,"max":145000,"currency":"USD","period":"year","gross":null,"usd_annual":145000},"salary_estimate":null,"experience_years_min":2,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"C++","optional":false},{"name":"CMake","optional":false},{"name":"Git","optional":false},{"name":"HPC","optional":false},{"name":"Python","optional":false},{"name":"FreeRTOS","optional":true},{"name":"Linux","optional":true},{"name":"RTOS","optional":true}],"status":"closed","first_seen_at":"2026-11-04T15:46:04Z","employer_posted_date":"2026-11-04","last_verified_at":"2026-11-05T18:14:04Z","board_verified":false,"closed_at":"2026-11-05T18:14:04Z","days_open":1,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":1},"description":"Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.\nLightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!\nIf you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.\nLightmatter is (re)inventing the future of computing with light!\nAbout the Role\nAt Lightmatter, we build photonic interconnect chips designed for large-scale AI compute clusters. As an Embedded Software Engineer for our products. You will develop the control, telemetry, monitoring, and stabilization firmware that maintains the health and lock of our optical transceivers, alongside the tooling required for system bring-up. Collaborating directly with systems, digital, analog, and photonics engineers, you will develop well-defined firmware components through their full lifecycle-from initial requirements to final release-while acquiring deep domain expertise in an emerging field.\nCore Responsibilities\nDevelop the lifecycle (requirements, bring-up, testing, and release) of well-defined optical transceiver firmware modules covering control, telemetry, diagnostics, and monitoring.\nImplement and refine photonic control and stabilization loops on embedded targets in partnership with analog and photonics design teams.\nPartner with hardware engineers during new board bring-up, utilizing oscilloscopes, logic-analyzers, JTAG, and GDB for debugging.\nParticipate in control and diagnostics design reviews, documenting findings for cross-functional engineering teams.\nOperate independently with guidance at key project milestones.\nQualifications\nExperience delivering firmware to production hardware or customers, with clear ownership of specific components.\nProficiency in C or C++ on resource-constrained targets, combined with Python skills for prototyping, test creation, and data analysis.\nSolid understanding of embedded communication buses and peripherals (SPI, I2C, GPIO, UART) and hardware-software co-integration.\nHands-on lab debugging skills using JTAG/GDB, logic-analyzers, and oscilloscopes.\nFamiliarity with Git and build toolchains such as CMake.\nBS or MS degree in Electrical Engineering, Computer Engineering, Computer Science, or equivalent, and 2+ years of professional experience in embedded software engineering.\nPreferred Qualifications\nExperience developing bare-metal firmware and working with RTOS environments (e.g., Zephyr, FreeRTOS).\nExperience with hardware-in-the-loop (HIL) test setups, test automation, or firmware CI pipelines.\nKnowledge of Embedded Linux and device driver development.\nExperience working with optical transceivers, photonic platforms, or high-precision analog/mixed-signal hardware.\nDomain understanding in laser physics or wavelength and thermal control systems.\nWe offer competitive compensation. The base salary range for this role determined based on location, experience, educational background, and market data.\nSalary Range: total compensation goes beyond base salary, it also includes a new hire equity grant, annual performance-based equity, and other rewards that recognize your impact and contribution.\n$125,000—$145,000 USD\nBenefits\nComprehensive Health Care Plan (Medical, Dental & Vision)\nRetirement Savings Matching Program\nLife Insurance (Basic, Voluntary & AD&D)\nGenerous Time Off (Vacation, Sick & Public Holidays)\nPaid Family Leave\nShort Term & Long Term Disability\nTraining & Development\nCommuter Benefits\nFlexible, hybrid workplace model\nEquity grants (applicable to full-time employees)\nBenefits eligibility may vary depending on your employment status and location. Lightmatter recruits, employs, trains, compensates, and promotes regardless of race, religion, color, national origin, sex, disability, age, veteran status, and other protected status as required by applicable law.\nExport Control\nCandidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.","description_format":"text","description_chars":4440,"description_truncated":false,"requirements":{"experience_years_min":2,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Equity","Life insurance","Parental leave"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Chips & Accelerators","Optics & Photonic Components"],"lifecycle":[{"event":"open","at":"2026-11-04T16:55:27Z"},{"event":"close","at":"2026-11-05T18:14:04Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"H-1B filings in 12 months: 27 · green card filings: 1","filings_12m":27,"filings_prev_12m":14,"green_card_filings_12m":1,"median_offered_wage_usd":177679,"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":7}],"liveness":null,"pay":{"stated_usd_annual":145000,"is_top_pay":true},"html_url":"https://alion.io/job/lightmatter-embedded-software-engineer","json_url":"https://alion.io/job/lightmatter-embedded-software-engineer.json","meta":{"generated_at":"2026-11-06T01:26:22Z","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":2364,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-07T00:00:00Z"}},"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":16141},"rest":"https://alion.io/mcp/rest/get_company?id=16141"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Flightmatter-embedded-software-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%2Flightmatter-embedded-software-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%2Flightmatter-embedded-software-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/lightmatter-embedded-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Flightmatter-embedded-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":3755909}},{"tool":"search_jobs","arguments":{"company":"lightmatter.co","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":3755909},"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. 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