Senior Engineer, Xfinity WiFi

Comcast•Philadelphia, PA

2d•Onsite

About The Position

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 The Xfinity WiFi team is seeking a Senior Engineer (Engineer 4) to support the design, development, and operation of Comcast’s large scale WiFi platforms, including a nationwide hotspot network serving millions of sessions across ~23M access points for Xfinity Mobile customers. This role focuses on hands on engineering, platform reliability, and feature delivery within established architectural frameworks. The Senior Engineer will contribute to network and WiFi design, platform security, and operational excellence while collaborating closely with peer engineers, product partners, and operations teams to deliver secure, high performance customer experiences at scale. Job Description 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.

Requirements

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

Nice To Haves

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

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