Principal Software Engineer, Full Stack
Company: Cambridge Mobile Telematics
Location: Cambridge
Posted on: April 1, 2026
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Job Description:
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. We are seeking an experienced Principal
Software Engineer to lead complex projects, and mentor teams in
building scalable and reliable full-stack solutions. The person in
this role will play a pivotal role in shaping the technical
direction of our platform and ensuring its continued success. CMT
is looking for a collaborative, customer-committed, and creative
Principal Software Engineer I, Full Stack who wants to join us in
making roads safer by making drivers better! Responsibilities: Lead
the development of critical features and components, ensuring high
quality and timely delivery Provide technical guidance and
mentorship to engineering teams, fostering a culture of excellence
Identify and resolve complex technical challenges, proactively
mitigating risks. Lead cross functional technical projects Evaluate
and recommend new technologies and approaches to improve system
performance and efficiency Design and implement robust, scalable,
and maintainable architectures for complex systems Collaborate with
product and engineering leaders to define technical roadmaps and
strategies Anticipate future technical needs and ensure the
platform is prepared for growth Contribute to the development of
best practices and standards for software development Ensure the
reliability and performance of production systems, providing
on-call support as needed Drive continuous improvement initiatives
to enhance operational efficiency Troubleshoot and resolve complex
production issues, minimizing downtime Follow company defined
development and operational standards and processes Mentor and
guide senior and junior engineers, fostering their technical growth
Lead code and design reviews, ensuring adherence to best practices
Collaborate effectively with cross-functional teams, including
product, QA, and operations Participate heavily in the hiring
process, and improve the hiring process Complete any additional
tasks as they arise Qualifications: Bachelor’s degree or equivalent
years of experience and/or certification in a technical field 7
years of relevant professional experience Deep expertise in web
technologies (HTML, CSS, JavaScript, TypeScript) and modern web
frameworks (e.g., React, Django) Extensive experience designing or
developing Restful APIs or web services Strong proficiency in a
backend development language (e.g. Python, Java) Expertise in cloud
platforms (e.g., AWS), including services like EC2, S3, Lambda,
SNS, SQS, RDS (Postgres), and NoSQL databases. Proven ability to
design and implement scalable and resilient systems. Strong
understanding of software development best practices, including
testing, CI/CD, and DevOps Understanding of Agile development
methodologies (specifically Scrum) Excellent communication and
collaboration skills Customer obsessed, demonstrates initiative,
has a learning mindset, takes ownership Demonstrated ability to
drive technical initiatives and influence architectural decisions.
Strong experience with system design 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: $167,200 to $209,000. This
range is specifically for Cambridge, MA A dditional 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: A t 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, m arital status,
veteran status or disability state. CMT is headquartered in
Cambridge, MA. To learn more, visit www.cmtelematics.com and follow
us on X @cmtelematics.
Keywords: Cambridge Mobile Telematics, Methuen , Principal Software Engineer, Full Stack, IT / Software / Systems , Cambridge, Massachusetts
