Senior Engineer, Xfinity WiFi

This role is based in our downtown Philadelphia Comcast Technology Center.

In this role, you will contribute to platform architecture and product development for Xfinity WiFi and adjacent connectivity services. Responsibilities include designing and operating highly available services, supporting complex L2/L3 networking and WiFi architectures, contributing to F5 BIG‑IP engineering initiatives, and ensuring secure, reliable platform operation.

You will work within established technical strategies, contribute to system design and implementation, participate in testing and certification efforts, and support continuous improvement of network performance and reliability. As a senior individual contributor, you will collaborate closely with cross‑functional partners and provide guidance to junior engineers through knowledge sharing and mentorship.

Responsibilities:

• Contribute to the design, implementation, and operation of high availability and geo redundant WiFi platforms and services

• Design, deploy, and maintain complex L2/L3 networking and WiFi architectures in large scale environments

• Engineer and support F5 BIG IP technologies (LTM, DNS/GTM, WAF) to enable reliable traffic management and security

• Support the engineering and operations of a nationwide hotspot network serving millions of customer sessions

• Implement platform security best practices, including service hardening, mTLS/PKI usage, and secure API integrations

• Participate in observability efforts across systems, including metrics, logging, alerting, and troubleshooting

• Perform performance analysis, capacity planning, and failure testing in partnership with operations teams

• Participate in system and architecture reviews, providing practical, implementation focused feedback

• Collaborate with product, platform, and partner engineering teams (e.g., RDK, Connected Living) to deliver new capabilities

• Contribute to testing, validation, and certification activities as required

• Mentor junior engineers and support the development of team technical skills and best practices

• Demonstrate operational rigor, clear communication, and a strong sense of ownership for delivered solutions

Qualifications:

• 7–10 years of experience in IP networking, WiFi, or distributed systems engineering

• Strong working knowledge of IP networking technologies (IPv4/IPv6, BGP, OSPF, DNS, DHCP, NAT)

• Hands on experience supporting F5 BIG IP solutions (LTM, DNS/GTM, WAF) in production environments

• Solid understanding of WiFi technologies including 802.11 standards, WPA2/WPA3, Passpoint/Hotspot 2.0, roaming, RADIUS, and EAP

• Experience designing, deploying, or operating highly available and secure networked systems

• Practical experience applying security best practices across network and platform layers

• Bachelor’s degree in Engineering, Computer Science, or equivalent practical experience
   

Preferred Qualifications:

• Experience working in containerized or cloud native environments (Kubernetes, service mesh, etc.)

• Familiarity with infrastructure as code and automation tools (Terraform, CI/CD pipelines)

• Experience with observability tools such as Prometheus, Grafana, or OpenTelemetry

• Exposure to performance engineering concepts such as load testing and capacity planning

• Strong collaboration skills and experience working with cross functional engineering and product teams

• Effective written and verbal communication skills for technical audiences
   

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.