The posting, in Cambridge Mobile Telematics's own words
archived Sep 30, 2026We're hiring a Principal Security Engineer I, Cloud & Infrastructure to own the security architecture of CMT's products, from our mobile SDKs and APIs to the services that power our platform. This is a highly autonomous individual contributor role where you'll set the technical direction for product security and influence engineering teams to deliver secure solutions. You'll stay hands-on with architecture while shaping security strategy across the organization through technical leadership, collaboration, and sound engineering judgment rather than people management. You'll also define how we securely build AI-powered products and adopt AI development tools, establishing the guardrails that enable innovation while reducing security risk. CMT is looking for a Principal Security Engineer I, Cloud & Infrastructure 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:
Own the end-to-end security architecture for CMT's products, including mobile SDKs, backend services, APIs, data pipelines, and partner integrations Define security standards, reference architectures, and engineering guardrails, and drive adoption across teams Embed security into the SDLC through threat modeling, secure design reviews, and actionable engineering requirements Lead threat modeling and translate findings into prioritized engineering work Define application security strategy for testing, secure coding, secrets management, and software supply chain security Own security architecture for protecting sensitive driver and location data Define security architecture and guardrails for AI/ML features and AI development tools Own the AppSec and Product Security roadmap, including technology strategy and prioritization Serve as the senior security authority for architecture reviews, risk decisions, and technical guidance Support customer and partner security reviews and mentor engineers on secure design Complete any additional tasks as they arise
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Qualifications:
Bachelor’s degree or equivalent years of experience and/or certification in a related field 7+ years of experience in security, with deep, hands-on expertise in application and product security architecture Broad AWS expertise — fluency in the fundamentals, including cloud networking, cloud firewalls, security groups, and IAM policies Experience with infrastructure as code, build pipelines, and cloud platform security Proven ability to provide technical leadership and drive security initiatives through influence Strong software engineering foundation with experience reviewing code and system architecture Deep knowledge of threat modeling, secure SDLC, OWASP, authentication, cryptography, API security, and mobile security Experience securing products that process sensitive personal data and support regulatory requirements Working knowledge of AI/ML and security, including secure AI adoption Excellent written and verbal communication skills