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Full-Time

System Architect

AMS Engineering

Confirmed live in the last 24 hours

Celestial AI

Celestial AI

51-200 employees

Optical interconnects for hyperscale data centers

Data & Analytics
AI & Machine Learning

Compensation Overview

$175k - $225kAnnually

+ Equity

Senior, Expert

Toronto, ON, Canada + 2 more

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

Category
Electronics Design Engineering
Embedded Systems Engineering
Electrical Engineering
Required Skills
Data Structures & Algorithms
MATLAB
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 by reducing the total DRAM requirements by up to 35%, leading to significant cost savings for data centers. It achieves this by utilizing optical interconnects that lower power consumption and increase bandwidth capacity, which is crucial for multi-tenant cloud environments where lower latency memory pooling can save around 23%. Additionally, Celestial AI's technology enables the disaggregation of High Bandwidth Memory (HBM) by using optics instead of traditional PCIe connections, addressing future needs for higher bandwidth connections among compute units. The company aims to provide this optical connectivity to data centers, facilitating advancements in Generative AI and other complex computing tasks, positioning itself as a key player in the evolution of advanced computing.

Company Stage

Series C

Total Funding

$337.9M

Headquarters

Sunnyvale, California

Founded

2020

Growth & Insights
Headcount

6 month growth

8%

1 year growth

23%

2 year growth

131%
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Simplify's Take

What believers are saying

  • The recent $175 million Series C funding round, led by prominent investors, underscores strong financial backing and growth potential.
  • Appointment of industry veteran Diane Bryant to the Board of Directors brings valuable expertise and credibility to the company.
  • Adoption of Photonic Fabric™ by leading hyperscalers indicates market validation and potential for widespread industry impact.

What critics are saying

  • The highly competitive nature of the high-performance computing market could challenge Celestial AI's ability to maintain its technological edge.
  • Dependence on the successful integration and adoption of Photonic Fabric™ technology by hyperscalers and other partners poses a risk if market acceptance is slower than anticipated.

What makes Celestial AI unique

  • Celestial AI's Photonic Fabric™ technology offers a unique optical compute interconnect that significantly reduces DRAM requirements and power consumption, setting it apart from traditional data center solutions.
  • The company's focus on disaggregating HBM over optics instead of PCIe provides a forward-looking approach to meet future bandwidth and latency needs, unlike competitors relying on conventional interconnects.
  • Strategic collaborations with hyperscalers and AI computing providers enable Celestial AI to address critical performance chokepoints, positioning it as a leader in advanced AI infrastructure.