Make your mark at Comcast -- a Fortune 30 global media and technology company. From the connectivity and platforms we provide, to the content and experiences we create, we reach hundreds of millions of customers, viewers, and guests worldwide. Become part of our award-winning technology team that turns big ideas into cutting-edge products, platforms, and solutions that our customers love. We create space to innovate, and we recognize, reward, and invest in your ideas, while ensuring you can proudly bring your authentic self to the workplace. Join us. You’ll do the best work of your career right here at Comcast. (In most cases, Comcast prefers to have employees on-site collaborating unless the team has been designated as virtual due to the nature of their work. If a position is listed with both office locations and virtual offerings, Comcast may be willing to consider candidates who live greater than 100 miles from the office for the remote option.) Job Summary 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. Job Description This Engineer 5 role is based with the team in our cutting-edge Comcast Technology Center in downtown Philadelphia. It is not eligible for remote or virtual hiring. Responsibilities: • 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. Preferred Qualifications: • 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. Employees at all levels are expected to: • 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. Skills Application Development, Distributed System Design, Mobile Core Network, Mobile Virtual Network Operator (MVNO), Software Architectures, Wireless Systems We believe that benefits should connect you to the support you need when it matters most, and should help you care for those who matter most. That's why we provide an array of options, expert guidance and always-on tools that are personalized to meet the needs of your reality—to help support you physically, financially and emotionally through the big milestones and in your everyday life. Please visit the benefits summary on our careers site for more details. Education 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. Certifications (if applicable) Relevant Work Experience 10 Years + Comcast is an equal opportunity workplace. We will consider all qualified applicants for employment without regard to race, color, religion, age, sex, sexual orientation, gender identity, national origin, disability, veteran status, genetic information, or any other basis protected by applicable law.