Full-Time

System Architect

AMS Engineering

Posted on 5/22/2024

Celestial AI

Celestial AI

51-200 employees

Optical interconnects for high-performance computing

Data & Analytics
Hardware
AI & Machine Learning

Compensation Overview

$175k - $225kAnnually

Senior

Toronto, ON, Canada + 2 more

More locations: California, USA | Santa Clara, CA, USA

Category
Electronics Design Engineering
Embedded Systems Engineering
Electrical Engineering
Required Skills
Python
MATLAB
C/C++
Requirements
  • Requires master’s degree with 6+ years of experience in related areas of expertise or PhD with 3+ years of experience
  • Knowledgeable about the common high-speed serial data protocols NRZ/PAM4 and system standards
  • Strong experience in communication system modeling in Matlab, C and/or Python
  • Experience in high-speed DSP, especially FFE/DFE, Clock and Data Recovery (CDR)
  • Experience with FEC (RS, soft decoding, Viterbi algorithm)
  • Experience with high-speed Analog Serdes and the associated calibration algorithms
  • Experience with debugging complex analog issues to improve system performance is required
  • Knowledge of digital design of DSP blocks will be a huge plus
Responsibilities
  • Understanding digital signal processing and digital communications for optical interfaces
  • Modelling/simulation/analysis of systems including high speed analog components (ADC, DAC, drivers, TIA), opto-electronic components (optical modulators, optical mixers, photodiodes, lasers, optical mux/demux, optical amplifiers), fiber impairments (CD, PMD, non-linearities) and DSP algorithms (calibration of analog and optical nonidealities, equalizers, carrier frequency/phase recovery, timing recovery)
  • Analysis and modelling of systems to drive definition of standards in OIF/IEEE/ITU-T
  • Work with lab equipment (spectrum analyzers, scopes, VOA, lasers, ASE generators etc.)
  • Design experiments to collect/analyze data to enable definition of next generation DSP
  • Debug complex optical, analog and signal processing problems
  • Design and simulate DSP architectures, define key capabilities, performance requirements and drive specifications for both analog and digital designers
  • Create DSP and FEC hardware block specifications appropriate for RTL implementation
  • Perform research activities in digital signal processing for SerDes and optical channels
  • Work with designers to ensure circuit architecture can be efficiently implemented
  • Develop/perform behavioral modeling of mixed-signal circuit designs for transceivers
  • Provide guidance on test plans for lab characterization once design comes back from fab
  • Participate in chip lab bring up
  • Should be comfortable working with lab equipment

Celestial AI focuses on enhancing the performance of hyperscale data centers through its technology called Photonic Fabric™, which is an optical compute interconnect. This technology improves memory sharing efficiency, allowing data centers to reduce their Dynamic Random Access Memory (DRAM) needs by up to 35%, leading to significant cost savings. By utilizing optical interconnects, Celestial AI not only lowers power consumption but also increases bandwidth capacity, which is crucial for multi-tenant cloud environments where lower latency memory pooling can save around 23%. Additionally, the technology enables the disaggregation of High Bandwidth Memory (HBM) by using optics instead of traditional PCIe connections, addressing future demands for higher bandwidth in computing. Celestial AI aims to provide data centers with this optical connectivity to support advanced applications like Generative AI, positioning itself as a key player in the evolution of high-performance computing.

Company Stage

Series C

Total Funding

$329.6M

Headquarters

Sunnyvale, California

Founded

2020

Growth & Insights
Headcount

6 month growth

15%

1 year growth

34%

2 year growth

128%
Simplify Jobs

Simplify's Take

What believers are saying

  • Acquisition of Rockley Photonics patents enhances Celestial AI's technological capabilities.
  • Diane Bryant's board appointment strengthens leadership with semiconductor and AI expertise.
  • $175 million Series C funding boosts development and scaling of Photonic Fabric.

What critics are saying

  • Competition from Lightmatter and Ayar Labs threatens Celestial AI's market position.
  • Rapid AI and photonics advancements may render current offerings obsolete.
  • Supply chain vulnerabilities in photonic components could disrupt production schedules.

What makes Celestial AI unique

  • Celestial AI's Photonic Fabric™ offers unique optical compute interconnect technology.
  • The company reduces DRAM requirements by up to 35%, saving billions annually.
  • Celestial AI enables HBM disaggregation over optics, surpassing PCIe limitations.

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