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. 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. We are hiring a Principal Digital Architect for high-speed photonic (mixed-signal) communication chips. As an architect, you will provide detailed technical documents that describe what needs to be built to the engineering team.

This will require a solid understanding of process technology, state of the art in chip design, and clear communication skills. You will represent the company externally at technical conferences as an example of our technical leadership. In this role, you will be defining the architecture of the digital circuits that enable a ground-breaking photonic-based communication fabric.

Your work will not only enable the AMS/photonic devices at low-level but also enable the necessary interfaces with the firmware/software. You will interact directly with our vendors and our customers. You will report directly to the Chief Scientist, but you will also work closely with our digital, analog, photonic, and software teams.





We are particularly looking for someone with expertise in architecting digital circuits to enable high-speed AMS circuits, with a strong preference for someone with experience in photonic circuits. You'll have the opportunity to build a new kind of computer from the ground up and to solve groundbreaking challenges along the way. Be the digital architecture owner of Lightmatter’s Passage product.

Responsible for the digital architecture from initial concept through high-volume production. Work closely with the technical program manager(s) to plan, organize, and execute. Lead direct collaboration with top tier semiconductor customer(s) throughout the product development process at the system architecture level.

Architect and specify system level digital designs integrating complex AMS and photonic circuits. Actively collaborate with the RTL and DV teams to enable block-level implementation and verification, respectively. Author, review, and validate architectural specifications.

Identify possible improvements as well as possible pitfalls (including mitigation strategies) around executing the proposed architectures.



12+ years and a Masters’ degree in Electrical or Computer Engineering In-depth knowledge of power-efficient digital design flow for high-speed AMS electronics, preferably on photonic communication channels. In-depth knowledge of digital circuit design in a high-speed analog/photonic link, including device bring-up, control, and digital signal processing. Demonstrated strong customer communication, with timely responses and consistently positive feedback Understanding of SerDes PCS layer and equalization along with forward error-correction schemes.

Power user of multiple development tools, including CAD tools, SPICE simulators, IBIS-AMI simulators, and general programming languages (e.g., MATLAB or Python). Innovative and adaptable; Data-driven and analytical; The base salary range for this role determined based on location, experience, educational background, and market data.

Salary 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. $191,000 - $362,000 CAD 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) 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. S. export control laws. #

📌 Principal Digital (mixed-signal) Architect (Toronto)
🏢 Lightmatter
📍 Toronto