Principal Digital Design Engineer (Toronto)

Job title: Principal Digital Design Engineer (Toronto)

Company: Lightmatter

Job description: Principal Digital Design Engineer

Lightmatter is a photonic computer company redefining what computers and human beings are capable of by building engines that will power discoveries and sustainably drive progress. With modern human progress relying heavily on computers, the world has hit a dead end with traditional transistors, and the prospect of constantly building data centers is an environmental nightmare. Lightmatter has created a solution in photonic computing: using photons instead of electrons to take advantage of their higher bandwidth. We build chips for artificial intelligence computing. Our architecture leverages the unique properties of light to enable fast and efficient inference and training engines.

We are hiring a Principal Digital Design Engineer to help lead ASIC development for the next-generation artificial intelligence computing architecture alongside a team of world-class scientists and engineers. If your passion is innovation, solving challenging technical problems, and doing impactful work, you should join our team and help build the world’s first optical computers!

In this job, you will collaborate closely with computer architects, software engineers, verification engineers, and physical design engineers to scope out and design innovative compute-accelerators that work with photonic technology to power the growing AI/ML workloads customers want while keeping power low. In addition to playing a key role in active projects, this role will also involve leading various small sub-teams across multiple domains in mapping out next-generation forward-looking projects. This will be 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 system and high-performance NoC.
  • Understand and integrate silicon photonic communication and compute technology into digital accelerator design.
  • Actively work with Architecture, Design Verification, Implementation, Photonic, Analog and Software teams to realize high performance, low power designs in advanced technology nodes.
  • Manage RTL implementation to achieve functionally correct, performant designs within project schedules by identifying, communicating and mitigating risks
  • Debug complex logic simulations
  • Generate documentation for modules, including functionality and timing
  • Actively collaborate with photonics and analog design teams to design devices that meet electrical and optical requirements
  • Work closely with software teams on functionality, interfaces, and documentation


  • Experience in leading multiple successful ASIC design tape outs
  • 20 years of related experience with a Bachelor’s degree; or 15 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

Preferred Qualifications

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


  • Comprehensive Health Care Plan (Medical, Dental & Vision)
  • 401k matching
  • 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
  • Commuter/Transit Benefits
  • Stock Option Plan

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.

Expected salary:

Location: Toronto, ON

Job date: Wed, 07 Feb 2024 23:16:22 GMT

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