Software Engineer in Test, Embedded Firmware

Cambridge Mobile Telematics · Cambridge · $85,700–$107,100 (stated in the posting)

We are looking for a Software Engineer in Test with an interest in embedded firmware to join our IoT (Internet of Things) group. The group develops software for the microcontroller-based sensor hardware designed and manufactured in-house. Our products offer an interesting engineering challenge: microcontrollers with just a few hundred kilobytes of RAM and code space must collect data from sensors such as accelerometers and GPS, communicate with back-end systems over the Internet and nearby devices with Bluetooth, perform over-the-air upgrades with new firmware, and manage cryptographically-secured storage — all while using so little power that they can run for years on a battery.

CMT is looking for a Software Engineer in Test II, Embedded Firmware to help us change the world. CMT has helped protect over 65 million drivers and prevent over 126,000 crashes worldwide. We build AI to solve some of the most difficult challenges in mobility — understanding and reducing risk, detecting crashes, and getting people life-saving help. The problems are hard. The impact is real. No matter your role, your work will matter at CMT.

Responsibilities:

Use independent judgment and responsibility to contribute to the development and maintenance of test infrastructure for firmware validation under the guidance of senior engineers
Execute and monitor firmware test runs across simulated firmware on Linux servers and real firmware on device
Write and maintain automated tests to improve coverage and enhance failure visibility
Use Python for test harnesses and scripting, with exposure to C for understanding firmware under test
Use Linux for development and git for source code management
Learn and apply knowledge of embedded microcontroller systems as it relates to firmware testing
Assist with test systems attached to equipment capable of measuring parameters like power usage • Gain familiarity with microcontroller circuit boards (e.g., Arduino-like devices), multimeters, benchtop power supplies, and electronic schematics
Support web services for test coordination and result display, leveraging knowledge of REST APIs and web application development
Triage and investigate test failures, distinguishing between firmware regressions and infrastructure issues
Complete any additional tasks as they arise

Qualifications:

Bachelor’s degree or equivalent years of experience and/or certification in Computer Science, Electrical Engineering, or a related field
2+ years of relevant working experience
Proficiency in Python programming; willingness to read and understand C
Comfortable working on the Linux command-line and performing basic system administration tasks
Experience writing and running automated tests, ideally in a CI environment
Familiarity with git and standard development workflows
Familiarity with Docker and cloud platforms (e.g., AWS) is a plus
Strong debugging and troubleshooting skills
Collaborative with the ability to work with diverse teams across the globe
Eager to learn and grow — a "leave things better than you found them" mindset
Ability to balance speed and quality and ask for help when needed

Nice to Haves:

Exposure to embedded systems, microcontrollers, or low-level programming
Experience with hardware test setups — oscilloscopes, multimeters, or reading basic schematics
Experience with SQL
Interest in performance measurement and instrumentation
Knowledge of QA engineering practices such as test planning, defect lifecycle management, and requirements traceability
Experience with build systems or release processes

Compensation and Benefits:

Fair and competitive salary based on skills and experience, and annual performance bonus
Equity may be awarded in the form of Restricted Stock Units (RSUs)
Medical, Dental, Vision and Life Insurance, matching 401k, short-term & long-term disability and parental leave
Unlimited Paid Time Off including vacation, sick days & public holidays
Flexible scheduling and work from home policy depending on role and responsibilities

Base Salary Range

The base salary range for this position is: $85,700 to $107,100. This range is specifically for Cambridge, MA

Additional Perks:

Work on a mission with real impact: crashes prevented, injuries avoided, lives protected around the world
Join an industry leader — 65 million drivers protected, powering 140+ programs across 25 countries
Recognized innovator in mobility AI, earning top honors including the TIME Industry Leader in AI, a Gold Edison Award, and the Artificial Intelligence Excellence Award for AI for Social Good. CMT is also Great Place to Work Certified
Be part of the team inventing the future of mobility and road safety
Move fast, own outcomes, do work that matters
High ownership, small teams, and direct access to leadership — no layers between your work and its impact
Unlimited PTO, flexible scheduling, competitive salary, annual performance bonus, RSUs, and full benefits including medical, dental, vision, and 401k match
Summer Fridays provide team members with half days to recharge
Join one of our employee resource groups: Black, AAPI, LGBTQIA+, Women, Book Club, and Health & Wellness
Comprehensive wellness, education, and employee assistance programs

Commitment to Diversity and Inclusion:

At CMT, we believe the best ideas come from a mix of backgrounds and perspectives.

We are an equal-opportunity employer committed to creating a workplace and culture where everyone feels valued, respected, and empowered to bring their unique talents and perspectives. Diversity is essential to our success, and we actively seek candidates from all backgrounds to join our growing team.

We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status or disability state. CMT is headquartered in Cambridge, MA. To learn more, visit www.cmtelematics.com and follow us on Instagram @cmt.ai

About Cambridge Mobile Telematics:

Cambridge Mobile Telematics (CMT) is the world’s largest telematics and AI company for safer mobility. Its mission is to make the world’s roads and drivers safer. The company’s AI-driven platform, DriveWell Fusion®, proactively identifies and reduces driving risk, leading to fewer crashes and injuries. To date, CMT’s technology has helped prevent over 126,000 crashes worldwide. CMT enables partners to measure risk, detect crashes, provide life-saving assistance, and streamline claims. Headquartered in Cambridge, MA, CMT operates globally with offices in Budapest, Hungary; Chennai, India; Seattle, Washington; Tokyo, Japan; and Zagreb, Croatia. Learn more at www.cmt.ai.

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