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Photonics Layout Engineer

Santa Clara, CA

About Celestial AI

As Generative AI continues to advance, the performance drivers for data center infrastructure are shifting from systems-on-chip (SOCs) to systems of chips. In the era of Accelerated Computing, data center bottlenecks are no longer limited to compute performance, but rather the system’s interconnect bandwidth, memory bandwidth, and memory capacity. Celestial AI’s Photonic Fabric™ is the next-generation interconnect technology that delivers a tenfold increase in performance and energy efficiency compared to competing solutions.

The Photonic Fabric™ is available to our customers in multiple technology offerings, including optical interface chiplets, optical interposers, and Optical Multi-chip Interconnect Bridges (OMIB). This allows customers to easily incorporate high bandwidth, low power, and low latency optical interfaces into their AI accelerators and GPUs. The technology is fully compatible with both protocol and physical layers, including standard 2.5D packaging processes. This seamless integration enables XPUs to utilize optical interconnects for both compute-to-compute and compute-to-memory fabrics, achieving bandwidths in the tens of terabits per second with nanosecond latencies.

This innovation empowers hyperscalers to enhance the efficiency and cost-effectiveness of AI processing by optimizing the XPUs required for training and inference, while significantly reducing the TCO2 impact. To bolster customer collaborations, Celestial AI is developing a Photonic Fabric ecosystem consisting of tier-1 partnerships that include custom silicon/ASIC design, system integrators, HBM memory, assembly, and packaging suppliers.

JOB DUTIES AND RESPONSIBILITIES:

  • Be a key part of the Physical Design team that is responsible for the layout of Silicon Photonic chips, subsystems and devices.
  • Contribute to product Photonic IC (PIC) delivery, all the way from floor-planning and top-level block placement to optical & electrical routing and back-end DRC and LVS verification.
  • Work in conjunction with broader analog, digital and packaging teams to drive PIC physical design in accordance with product requirements related to opto-electronic performance, signal integrity (SI) & power integrity (PI).
  • Work closely with the rest of the Photonics team to optimize layout flows and add to existing software base for automated design and verification.                                                                                 

QUALIFICATIONS/SKILLS:

  • Specialized skills
    • Strong experience with physical design packages (Cadence, Siemens Mentor, Klayout or similar), including layout automation within these tools using SKILL, Python or similar.
    • Strong experience with Silicon Photonics Process Design Kits and related best practices in the layout of photonic devices, sub-systems and full chips.
    • Experience with layout verification tools for DRC, ERC and LVS (Calibre, Pegasus or similar). Ability to create custom decks within these tools is a plus.
    • Familiarity with SI and PI-aware electrical routing for analog and digital blocks is a strong plus.
  • Education requirements
    • Minimum MS in engineering or physics.
  • Experience requirements
    • Minimum 7 years of relevant experience
  • Attributes
    • Self-starter
    • Thrives in a highly collaborative and dynamic work environment
    • Has excellent oral and written communication skills
    • Creativity in problem-solving with strong attention to detail

Location: Santa Clara, CA

Compensation:

As an early startup, we offer an attractive total compensation package, inclusive of competitive base salary and a generous grant of our valuable early-stage equity. The target base salary for this role is approximately $180,000 - $225,000. The base salary offered may be slightly higher or lower than the target base salary, based on the final scope as determined by the depth of the experience and skills demonstrated by the candidate in the interviews.

We offer great benefits (health, vision, dental and life insurance), collaborative and continuous learning work environment, where you will get a chance to work with smart and dedicated people engaged in developing the next generation architecture for high performance computing.

Celestial AI Inc. is proud to be an equal opportunity workplace and is an affirmative action employer.

 

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