Senior Engineer, Xfinity WiFi

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.

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.

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.

Skills:

Customer Experience (CX); Technical Requirements; IP Network Engineering; Wireless; Network Architecture Design

Base pay is one part of the Total Rewards that Comcast provides to compensate and recognize employees for their work. Most sales positions are eligible for a Commission under the terms of an applicable plan, while most non-sales positions are eligible for a Bonus. Additionally, Comcast provides best-in-class Benefits to eligible employees. 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 compensation and 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.

Relevant Work Experience

7-10 Years