Principal Engineer, Xfinity Mobile Systems & Software Architecture

Comcast Resume • Philadelphia, PA

7d • Onsite

About The Position

The Principal Engineer provides technical leadership across Xfinity Mobile systems, multi-MNO integrations, and software platforms. The role bridges MVNO engineering, product, software development, and operations, translating network capabilities, partner interfaces, service behaviors, and product requirements into end-to-end technical solutions and software requirements. Initial focus areas include international roaming and roaming product service assurance, with support for broader Xfinity Mobile initiatives across a multi-MNO environment.

This Engineer 5 position is based with the team at Comcast Technology Center in downtown Philadelphia and is not eligible for remote or virtual hiring. The role leads solution architecture, integration design, technical reviews, and cross-functional problem resolution, while providing technical guidance and mentorship to engineering teams.

Requirements

• 10 or more years of relevant work experience.
• Bachelor's degree preferred; Comcast may also consider a combination of coursework and experience or extensive related professional experience.
• Extensive experience in telecommunications, wireless systems, software architecture, systems engineering, or related engineering disciplines.
• Strong understanding of mobile network and MVNO architectures.
• 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, including 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.
• Software development experience sufficient to collaborate effectively with application development teams and participate in detailed software architecture and design discussions.

Nice To Haves

• Experience designing solutions in multi-MNO, MVNO, or carrier-integrated environments.
• 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.

Responsibilities

• Lead end-to-end solution architecture for Xfinity Mobile capabilities spanning multiple MNOs, Comcast applications, and business or product partner integrations.
• Translate network capabilities, partner interfaces, service behaviors, and product needs into system architecture and clear, testable software requirements.
• Bridge MVNO/network engineering and software development teams, translating telecom capabilities into scalable software solutions.
• Evaluate differences in MNO capabilities and interfaces and develop solution patterns that enable common Xfinity Mobile capabilities while accommodating MNO-specific requirements.
• 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 based on 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.
• Follow Comcast Operating Principles, prioritize customer experience, support teamwork and inclusion, contribute to the Net Promoter System, and drive results and growth.

Benefits

• Comcast offers an array of benefits options, expert guidance, and always-on tools personalized to support employees physically, financially, and emotionally. Further details are available in the benefits summary on the careers site.

What This Job Offers

• Job Type: Full-time
• Career Level: Principal