Software Engineer in Test, Embedded Firmware

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: $104,500 to $130,600. This range is specifically for Cambridge, MA

A dditional 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 and follow us on Instagram @cmt.ai

A bout 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