Sr SDET– Firmware Automation

Lightmatter, Inc.; Toronto; Hybrid; CAD 120,000 - 190,000; Full time

Benefits offered by this job

Retirement Savings Matching Program

Life Insurance

Generous Time Off

Paid Family Leave

Short Term & Long Term Disability

Training & Development

Flexible, hybrid workplace model

Equity grants

Job summary

Lightmatter is seeking a senior SDET to lead firmware test automation across products and hardware. You will design, implement, and maintain automated tests aligned with production-quality standards, working closely with firmware and software teams.

You will orchestrate HIL infrastructure and CI/CD integration to ensure every code change is validated on real photonic hardware, driving reliability and fast feedback loops.

Qualifications

• 8+ years of professional software development, primarily on embedded products, including designing test frameworks and infrastructure.
• BS or MS in Computer Science, Electrical Engineering, or equivalent experience.
• At least one automation framework or HIL system designed and built from scratch and used daily.

Responsibilities

• Own the architecture and roadmap of the firmware test automation framework across products, targets, sites, and teams
• Design and build stable automation for new firmware features and hardware, held to production-quality engineering standards
• Build and operate HIL test infrastructure: bench and rack fixtures, device farms, power/reset control, instrument integration, and CI orchestration on real photonic hardware
• Define test strategy, plans, and reporting; lead test plan reviews across teams
• Integrate firmware testing into CI/CD so every change is built, flashed, exercised on hardware, and reported automatically
• Own framework reliability and flaky test metrics as first-class engineering problems
• Build results, telemetry, and log pipelines for triage, trend analysis, and release decisions
• Debug failures across the full stack (firmware, board, instrument, fixture, test code) and partner with engineers to resolve them
• Participate in firmware design reviews to influence testability and diagnostics early
• Integrate with data center management interfaces (CMIS, OpenBMC, DMTF); debug embedded systems using GDB, JTAG, and logic analyzers

Skills

Embedded C/C++

Python

CI/CD pipelines

Test automation

Firmware testing

HIL systems

GitHub Actions/GitLab CI

Education

BS or MS in Computer Science or Electrical Engineering

PhD in a relevant field (preferred)

Tools

Zephyr

FreeRTOS

Twister

Renode

QEMU

GDB/JTAG

Job description

Lightmatter is leading the revolution in AI data center infrastructure, enabling the next giant leaps in human progress. The company invented the world’s first 3D-stacked photonics engine, Passage™, capable of connecting thousands to millions of processors at the speed of light in extreme-scale data centers for the most advanced AI and HPC workloads.

Lightmatter raised $400 million in its Series D round, reaching a valuation of $4.4 billion. We will continue to accelerate the development of data center photonics and grow every department at Lightmatter!

If you're passionate about tackling complex challenges, making an impact, and being an expert in your craft, join our team of brilliant scientists, engineers, and accomplished industry leaders.

Lightmatter is (re)inventing the future of computing with light!

At Lightmatter, an SDET is a software engineer first , not a QA coordinator or manual tester. You'll design and build the frameworks, harnesses, and hardware-in-the-loop infrastructure that let firmware engineers test their own code continuously on real photonic hardware. You'll sit with the firmware team, spend time at the bench with oscilloscopes, debuggers, and optical instruments, and serve as the bridge between firmware and broader software and systems organizations.

Responsibilities

• Own the architecture and roadmap of the firmware test automation framework across products, targets, sites, and teams
• Design and build stable automation for new firmware features and hardware, held to production-quality engineering standards
• Build and operate HIL test infrastructure: bench and rack fixtures, device farms, power/reset control, instrument integration, and CI orchestration on real photonic hardware
• Define test strategy, plans, and reporting; lead test plan reviews across teams
• Integrate firmware testing into CI/CD so every change is built, flashed, exercised on hardware, and reported automatically
• Own framework reliability and flaky test metrics as first-class engineering problems
• Build results, telemetry, and log pipelines for triage, trend analysis, and release decisions
• Debug failures across the full stack (firmware, board, instrument, fixture, test code) and partner with engineers to resolve them
• Participate in firmware design reviews to influence testability and diagnostics early
• Integrate with data center management interfaces (CMIS, OpenBMC, DMTF); debug embedded systems using GDB, JTAG, and logic analyzers
• Define diagnostics and monitoring architecture for photonic transceivers
• Mentor engineers on test architecture and write clear documentation for non-specialists

Qualifications

• 8+ years of professional software development, primarily on embedded products, including designing test frameworks and infrastructure
• BS or MS in Computer Science, Electrical Engineering, or equivalent experience
• At least one automation framework or HIL system architected and built from scratch, adopted by other engineers, and in daily use and the ability to discuss its design, tradeoffs, and lessons learned
• Strong Python: fixture and abstraction layers, hardware drivers, plugin/configuration architectures
• Working fluency in embedded C/C++: able to read firmware drivers or state machines and write tests for edge cases
• Experience owning CI/CD pipelines running tests on physical hardware (GitHub Actions, GitLab CI, Jenkins, or equivalent), including runner health, hardware allocation, and recovery
• Track record of delivering robust automation under fast-changing requirements and hardware

Preferred Qualifications

• PhD, or MS with 8+ years in embedded test automation or firmware development
• Experience testing firmware for optical transceivers, photonic systems, or precision analog/mixed-signal hardware
• Familiarity with CMIS, OpenBMC, or DMTF/Redfish
• Experience with Pytest ecosystem and test tooling for Zephyr or FreeRTOS (Twister, ztest, Renode, QEMU, or similar)
• Experience with optical and electrical test and measurement equipment
• Startup experience
• Thoughtful use of AI-assisted tools in test generation, triage, or analytics
• Retirement Savings Matching Program
• 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
• Equity grants (applicable to full-time employees)

Benefits eligibility may vary depending on your employment status and location. 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.

Export Control

Candidates should have capacity to comply with the federally mandated requirements of U.S. export control laws.

Lightmatter follows a hybrid work model

Lightmatter observes a hybrid work model for positions based in one of our office locations.

Voluntary Self-Identification

As set forth in Lightmatter’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.