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Principal Embedded Software Engineer

Cambridge Mobile Telematics

Cambridge Mobile Telematics

Software Engineering
Cambridge, MA, USA
Posted on Wednesday, May 15, 2024

Cambridge Mobile Telematics (CMT) is the world’s largest telematics service provider. Its mission is to make the world’s roads and drivers safer. The company’s AI-driven platform, DriveWell® Fusion, gathers sensor data from millions of IoT devices — including smartphones, proprietary Tags, connected vehicles, dashcams, and third-party devices — and fuses them with contextual data to create a unified view of vehicle and driver behavior. Auto insurers, automakers, commercial mobility companies, and the public sector use insights from CMT’s platform to power risk assessment, safety, claims, and driver improvement programs. Headquartered in Cambridge, MA, with offices in Budapest, Chennai, Seattle, Tokyo, and Zagreb, CMT measures and protects tens of millions of drivers across the world every day.

CMT is looking for a collaborative, customer-committed, and creative Principal Embedded Software Engineer who wants to join us in making roads safer by making drivers better!


  • Develop embedded software for microcontroller-based sensor hardware, ensuring efficient utilization of limited memory and processing capabilities
  • Implement data collection from various sensors, such as accelerometers and GPS, ensuring accurate and efficient data handling
  • Design and maintain communication protocols to interface with back-end systems and nearby devices
  • Execute and manage over-the-air firmware upgrades, ensuring systems are up-to-date and secure
  • Develop and maintain cryptographically-secured storage solutions to protect sensitive data
  • Optimize power consumption to extend battery life in low-power IoT devices
  • Collaborate with the firmware group to design software architectures, write and review code, and develop tests to ensure software reliability and performance
  • Measure and analyze key performance metrics, such as power usage, to continuously improve product efficiency
  • Maintain a healthy codebase, managing complexity to ensure scalability and maintainability
  • Participate in the full design process, collaborating with product managers and hardware engineers to align technical capabilities with customer requirements
  • Complete any additional tasks as they arise


  • Bachelor’s degree or equivalent years of experience and/or certification in a related field
  • 7+ years of relevant work experience
  • Absolute fluency in C and Python programming
  • Able to visualize the product in a system and make tradeoffs that include implications upstream and downstream
  • Strong experience with systems software issues – e.g., race conditions, memory management
  • Experience working at the boundary of hardware and software – e.g., interrupt handling, device driver development, bringing up untested hardware
  • Comfortable with the Linux command-line
  • Comfortable with git
  • Track record of writing clean, readable, testable code


  • Past experience with bare-metal programming on ARM Cortex M CPUs
  • Know your way around an oscilloscope and how to read a hardware schematic
  • Experience with wireless tech, including Bluetooth, LTE, LoRa and others
  • Familiarity with AWS
  • Knowledge of networking, messaging protocols, and end-to-end encryption
  • Experience with low-power design
  • Experience building and running tests in CI environments, including running tests automatically on real hardware
  • Experience instrumenting systems for performance measurement

Compensation and Benefits:

  • Fair and competitive salary based on skills and experience
  • 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

Additional Perks:

  • Feel great working to improve road safety around the world!
  • Join one of our many employee resource groups including Black, AAPI, LGBTQIA+, Women, Book Club and Health & Wellness
  • Extensive wellness, education and employee assistance programs
  • CMT will do all that is possible to support our employees and create a positive and inclusive work environment for all!

Commitment to Diversity and Inclusion:

At CMT, we are intensifying our commitment to provide opportunities and career growth to the underrepresented. We are focused on creating an inclusive work environment that encourages a diversity of background and thought to produce the best products and services within our industry.

CMT is an equal opportunity employer and strives to create an inclusive and diverse environment that enriches our employees’ lives in and outside of work. We do not discriminate on the basis of 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 Twitter @cmtelematics.