Principal Machine Learning Infrastructure Researcher
LightmatterRole Overview
Lightmatter is hiring a Principal Machine Learning Infrastructure Researcher. This is a full-time role in Mountain View. Part of Lightmatter's Data Science hiring, posted today. applications are still in the early window, before most candidates have applied. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job 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.
Lightmatter 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!
If 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.
Lightmatter is (re)inventing the future of computing with light!
Lightmatter is seeking a Principal of Machine Learning Infrastructure Researcher to join our Machine Learning team. This team is focused on inventing novel hardware systems using Lightmatter technology and modeling the performance of Lightmatter-enabled systems on both training and inference workloads.
This is primarily a creative role where you need to think outside the box to push the boundaries of systems research with the power of silicon photonics at your fingertips. This role will work closely with our product, solutions architecture, and engineering teams to generate impactful performance analysis, create high-performance rack-scale designs, and publish cutting-edge ML systems research.
Responsibilities:
- Stay up to date on the latest advancements in Machine Learning research.
- Build tools to model the performance of Passage-enabled systems when running both training and inference workloads for the latest AI models.
- Collaborate with our product and solutions architecture teams to design compelling reference platforms for our customers, powered by Lightmatter technology.
- Function as the Machine Learning expert in the room.
- Publish academic papers at top industry conferences and journals. Help support the publication of whitepapers, blog posts, and other marketing collateral.
- Lead a small team of Machine Learning engineers
Qualifications:
- PhD in Computer Science, Electrical Engineering, or a related field and at least 10 years of industry or research experience in the field.
- Solid background in Machine Learning systems research and experience with performance evaluation and performance modeling.
- Hands-on experience with machine learning / deep learning methods and extensive knowledge of Large Language Model training and inference frameworks.
- Academic publications in relevant journals and industry conferences.
- Strong knowledge of AI systems, including compute (GPUs, TPUs, etc.) and networking (Ethernet, Infiniband, NVLink, etc.) technologies, and their various topologies, paradigms, and trade-offs.
- Proven track record leading a team to deliver published results.
Preferred Qualifications:
- Demonstrated ability to creatively problem-solve and apply first-principles thinking to generate novel ideas, particularly in ambiguous, evolving environments.
- Exceptional skills in communicating complex research outcomes and technical concepts to partners and internal stakeholders, while embodying our value of speaking truth.
- Ability to work across research, product, and business functions, rolling up your sleeves to bridge gaps and accelerate outcomes, while demonstrating the core value of "We are one Lightmatter."
- Adaptable and versatile, thriving in a high-speed, high-precision environment.
- Experience in managing engineers and leading projects, with the ability to lift up the team, and work with high standards and high collaboration.
We offer competitive compensation. On target earnings range is listed below. The final compensation will be determined based on location, experience, educational background, and market data.
Benefits
- Comprehensive Health Care Plan (Medical, Dental & Vision)
- Retirement Savings Matching Program
- Life Insurance (Basic, Voluntary & AD&D)
- Generous Time Off (Vacation, Sick & Public Holidays)
- Paid Family Leave
- Short Term & Long Term Disability
- Training & Development
- Commuter Benefits
- Flexible, hybrid workplace model
- Equity grants (applicable to full-time employees)
Benefits 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.
Export Control
Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.
About Lightmatter
Lightmatter
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Frequently Asked Questions
How do I apply for the Principal Machine Learning Infrastructure Researcher position at Lightmatter?
Use the Apply button above to submit your application directly to Lightmatter. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Where is the Principal Machine Learning Infrastructure Researcher position at Lightmatter located?
This position is based in Mountain View. Lightmatter has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.
What does a Principal Machine Learning Infrastructure Researcher at Lightmatter earn?
Lightmatter has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the Principal Machine Learning Infrastructure Researcher role at Lightmatter posted?
This role was posted on July 9, 2026 (today). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
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