Senior Firmware Engineer at Celestial AI

Santa Clara, California, United States

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Not SpecifiedCompensation

Senior (5 to 8 years)Experience Level

Full TimeJob Type

UnknownVisa

Artificial Intelligence, Semiconductors, Photonics, Data CentersIndustries

Requirements

Bachelor’s degree with 8+ years of experience, or Master’s degree with 6+ years of experience in Computer Science, Electrical Engineering, Information Technology or a related technical field
At least 5 years of hands-on experience in firmware or embedded software development
Deep proficiency in C (required) and/or C++ (highly desired) for embedded systems
Demonstrated experience with microcontroller architectures (e.g., ARM Cortex-M/R/A, ESP32, RISC-V) and their peripherals, including understanding of clocking, interrupts, DMA, and memory-mapped registers
Proven ability to debug complex hardware/firmware issues on the bench using in-circuit debuggers (JTAG/SWD) with GDB, oscilloscopes (reading signal waveforms, verifying timing, identifying glitches), logic analyzers (decoding digital bus traffic like SPI, I2C, UART), and multimeters/power supplies for basic electrical troubleshooting
Experience in writing bare-metal drivers and working directly with device registers
Familiarity with version control systems (Git preferred)

Responsibilities

Demonstrate best practices in software development and documentation to deliver high-quality software on tight schedules while meeting all requirements
Actively engage in code reviews and discussions to share knowledge and improve code quality
Participate in gathering technical requirements and contributing to firmware and software design specifications
Provide support to both internal and external SW and HW development teams
Provide guidance on test plans for lab characterization once design comes back from fab
Develop production-grade firmware for Celestial AI’s photonic fabric product lineup
Develop firmware APIs for resource management and optimization
Collaborate closely with hardware and software teams to implement the communication management software for different Photonic Fabric use cases
Be a key player in the architecture and full lifecycle development of an AI platform system, including requirements, design, code, and test

Skills

Key technologies and capabilities for this role

Firmware EngineeringSystem ArchitectureAI PlatformsPhotonic FabricAI/ML SolutionsRequirements AnalysisDesignCodingTestingEmbedded Systems

Questions & Answers

Common questions about this position

What is the salary range for the Senior Firmware Engineer position?

This information is not specified in the job description.

Is this Senior Firmware Engineer role remote or does it require office presence?

This information is not specified in the job description.

What qualifications and experience are required for the Senior Firmware Engineer role?

A Bachelor’s degree with 8+ years of experience or a Master’s degree is required.

What are the main responsibilities of the Senior Firmware Engineer?

Responsibilities include architecture and full lifecycle development of AI platform systems, developing production-grade firmware and APIs for Photonic Fabric, and collaborating with hardware and software teams.

What makes a strong candidate for the Senior Firmware Engineer position at Celestial AI?

Strong candidates demonstrate best practices in software development, engage in code reviews, participate in requirements gathering and design, provide support to teams, and guide test plans.

Celestial AI

Optical interconnects for high-performance computing

About Celestial AI

Celestial AI focuses on high-performance computing for hyperscale data centers with its technology called Photonic Fabric™, an optical compute interconnect. This technology reduces DRAM requirements by up to 35% and lowers power consumption while increasing bandwidth capacity, which is essential for multi-tenant cloud environments. Additionally, it allows for the disaggregation of High Bandwidth Memory (HBM) using optics instead of traditional connections. The goal is to provide optical connectivity that supports advancements in Generative AI and complex workloads.

Sunnyvale, CaliforniaHeadquarters

2020Year Founded

$329.6MTotal Funding

SERIES_CCompany Stage

Data & Analytics, Hardware, AI & Machine LearningIndustries

51-200Employees

Benefits

Health Insurance

Vision Insurance

Dental Insurance

Life Insurance

Company Equity

Risks

Emerging competition from companies like Lightmatter and Ayar Labs.

Potential integration challenges with existing data center infrastructure.

Dependency on limited suppliers for photonic components poses supply chain risks.

Differentiation

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 disaggregation of HBM over optics, enhancing bandwidth capacity.

Upsides

Acquisition of Rockley Photonics' IP strengthens Celestial AI's competitive position.

$175 million Series C funding supports further innovation and market expansion.

Growing demand for energy-efficient solutions aligns with Celestial AI's sustainable focus.

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