Digital Design Engineer

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!

We are hiring a Digital Design Engineer to help develop an ASIC for the next‑generation artificial intelligence computing architecture alongside a team of world‑class scientists and engineers. In this role you will work in close collaboration with computer architects, software engineers, verification engineers, and physical design engineers to design innovative compute accelerators that power the growing AI/ML workloads while keeping power low.

This is a great opportunity to define the next advance in computer architecture.

• Develop microarchitecture design and RTL for advanced ML/AI accelerator ASICs/SoCs, including advanced memory systems and high‑performance NoC.
• Understand and integrate silicon photonic communication and compute technology into digital accelerator design.
• Actively collaborate with Architecture, Design Verification, Implementation, Photonic, Analog and Software teams to realize high performance, low power designs in advanced technology nodes.
• Create design specifications and documentation to facilitate collaboration with partner teams.
• Manage RTL implementation to achieve functionally correct, performant designs within project schedules by identifying, communicating, and mitigating risks.

• Experience in ASIC design with multiple successful tape‑outs.
• 8 years of related experience with a Bachelor’s degree; or 6 years and a Master’s degree in Electrical or Computer Engineering (or related fields).
• Expertise with high‑speed digital design techniques.
• Expertise with power‑efficient digital design techniques.

• Experience in communication protocols (e.g., PCIe).
• Experience interfacing with memory systems (e.g., HBM/DDR5).
• Knowledge of processor design, accelerators, and/or memory hierarchies.
• Knowledge of machine learning algorithms.

We offer competitive compensation. The base salary range for this role is determined based on location, experience, educational background, and market data. Total compensation includes a new hire equity grant, annual performance‑based equity, and other rewards that recognize your impact and contribution.

$195,000 – $214,000 USD

• 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
• 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.

Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.

We are a federal contractor or subcontractor. The law requires us to provide equal employment opportunity to qualified people with disabilities. We have a goal of having at least 7% of our workers as people with disabilities. The law says we must measure our progress toward this goal. To do this, we must ask applicants and employees if they have a disability or have ever had one.

People can…