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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Engineer, Xfinity Mobile Systems & Software Architecture - **Company:** Comcast - **Location:** Philadelphia, PA, United States (Remote available) - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** 4G (Telecommunication), LTE (Telecommunication), Application Programming Interfaces (APIs), Applications Architecture, Computing Platforms, Systems Engineering, Configuration Management, Distributed Systems, Mobile Application Software, Mobile Virtual Network Operator, Software Architecture, Message Oriented Middleware, Software Engineering, Software Requirements Analysis, Systems Architecture, Wireless Networks, Mobile Network Operator, Data Logging, Event Driven Architecture, Apache Kafka, Wireless Technologies, OSS/BSS, Restful APIs, Microservices - **Published:** October 21, 2026 - **Apply:** https://www.phillyjobs.com/job.asp?id=3472119877&tx=FR9794FFR&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54 ## About the Role * Extensive experience in telecommunications, wireless systems, software architecture, systems engineering, or related engineering disciplines. * Strong understanding of mobile network and MVNO architectures. * Experience designing solutions in multi-MNO, MVNO, or carrier-integrated environments. * Demonstrated ability to translate network, product, and partner capabilities into system and software requirements. * Experience designing complex distributed systems and integrations using REST APIs, event-driven architectures, asynchronous messaging, and related integration patterns. * Experience designing highly available, resilient, scalable, and operationally supportable applications. * Experience with production observability, service assurance, monitoring, logging, metrics, alerting, and end-to-end troubleshooting. * Strong systems-thinking and problem-solving skills with the ability to analyze interactions across networks, applications, partner platforms, and infrastructure. * Demonstrated ability to lead technical architecture discussions and influence decisions across multiple teams and organizations. * Strong written and verbal communication skills. * Experience working with an MVNO or mobile network operator. * Experience with international roaming products, systems, or service assurance. * Knowledge of 4G/LTE and 5G architectures and mobile services. * Knowledge of SIM/eSIM provisioning, subscriber provisioning, entitlement, policy, charging, or OSS/BSS systems. * Experience with cloud platforms, microservices, APIs, event-driven architectures, and technologies such as Kafka. * Experience with multi-region or multi-site application architectures. * Software development experience sufficient to collaborate effectively with application development teams and participate in detailed software architecture and design discussions., Mobile Virtual Network Operator (MVNO); Application Development; Software Architectures; Wireless Systems; Distributed System Design; Mobile Core Network, Bachelor's Degree While possessing the stated degree is preferred, Comcast also may consider applicants who hold some combination of coursework and experience, or who have extensive related professional experience. ## Description This role provides technical leadership across Xfinity Mobile systems, multi-MNO integrations, and software platforms. The Principal Engineer will serve as a bridge between MVNO engineering, product, software development, and operations teams, translating network capabilities, partner interfaces, service behaviors, and product requirements into end-to-end technical solutions and software requirements. The role will initially focus on international roaming and roaming product service assurance, while supporting broader Xfinity Mobile initiatives across our multi-MNO environment., * Lead end-to-end solution architecture for Xfinity Mobile capabilities spanning multiple MNOs, Comcast applications, and business/product partner integrations. * Translate network capabilities, partner interfaces, service behaviors, and product needs into system architecture and clear, testable software requirements. * Serve as a technical bridge between MVNO/network engineering and software development teams, helping translate telecom capabilities into scalable software solutions. * Evaluate differences in MNO capabilities and interfaces and develop solution patterns that support common Xfinity Mobile capabilities while accommodating MNO-specific requirements where needed. * Develop architecture diagrams, end-to-end call flows, interface specifications, APIs, event flows, and functional and non-functional requirements. * Provide technical leadership for international roaming and roaming product service assurance, including monitoring, observability, troubleshooting, and operational capabilities. * Define requirements for highly available and resilient applications, including scalability, security, configuration management, failure handling, recovery, logging, monitoring, and alerting. * Partner with software engineering teams throughout architecture, design, development, and production readiness. * Analyze complex issues spanning MNO capabilities, partner platforms, Xfinity Mobile applications, and supporting infrastructure and drive cross-functional technical resolution. * Evaluate solution alternatives and technical trade-offs considering customer experience, reliability, operational complexity, extensibility, cost, and time to market. * Lead architecture and design reviews and provide technical guidance and mentorship across engineering teams. * Influence technical direction across product, engineering, operations, MNO, and partner organizations., * Understand our Operating Principles; make them the guidelines for how you do your job. * Own the customer experience think and act in ways that put our customers first, give them seamless digital options at every touchpoint, and make them promoters of our products and services. * Know your stuff be enthusiastic learners, users and advocates of our game-changing technology, products and services, especially our digital tools and experiences. * Win as a team make big things happen by working together and being open to new ideas. * Be an active part of the Net Promoter System a way of working that brings more employee and customer feedback into the company by joining huddles, making call backs and helping us elevate opportunities to do better for our customers. * Drive results and growth. * Support a culture of inclusion in how you work and lead. * Do what's right for each other, our customers, investors and our communities. Disclaimer: This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications.