Principal Engineer, Xfinity Mobile Systems & Software Architecture

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…