Principal Engineer, Xfinity WiFi 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

The Xfinity WiFi team is seeking an Engineer 6 (Principal-level) to lead the architecture, evolution, and end‑to‑end operations of Comcast’s large‑scale WiFi platforms, including a nationwide hotspot network serving millions of sessions from ~4M access points used by Xfinity Mobile customers. This leader will define the multi‑year technical roadmap, design and harden carrier‑grade platforms, and drive operational excellence across networking, WiFi, and security. The role partners closely with peer platform teams and internal business stakeholders to deliver resilient, secure, and high‑performance customer experiences at scale.

Job Description

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

In this role, you will own platform architecture and product development for Xfinity WiFi and adjacent connectivity services. Responsibilities include high‑availability control plane design, complex L2/L3 networking, WiFi architecture development, F5 BIG‑IP engineering, and secure platform design. You will drive technical strategy, influence cross‑team architectural decisions, and ensure end‑to‑end network performance and reliability. This role requires strong experience in large‑scale network design, WiFi technologies, platform security, and distributed systems operations. You will act as a consultative expert across Comcast, participate in testing and certification efforts, identify emerging technologies, and contribute to architectural reviews. As a principal-level leader, you will mentor senior engineers and support the growth of future technical leaders.

Core Responsibilities

• Define and own the multi‑year technical roadmap for Xfinity WiFi platforms and services.

• Lead architecture for high‑availability and geo‑resilient services leveraging F5 BIG‑IP technologies.

• Design and oversee complex L2/L3 networks, WiFi architectures (including Passpoint/Hotspot 2.0), roaming standards, and secure control planes.

• Provide technical leadership for the engineering design and operations of a nationwide hotspot network (~4M APs).

• Implement defense‑in‑depth security practices, platform hardening, mTLS/PKI, and secure API gateway patterns.

• Drive observability across systems, including metrics, logging, and distributed tracing.

• Perform load testing, capacity modeling, failure testing, and performance engineering.

• Provide consultative services to internal partners and external stakeholders.

• Recommend technology direction, long‑term solutions, and strategies aligned with product growth.

• Identify trends, services, and capabilities that benefit future product offerings.

• Participate consultatively in testing and certification processes as needed.

• Contribute to architectural and system design reviews across organizations.

• Collaborate closely with product and engineering groups such as RDK and Connected Living.

• Mentor senior engineers and foster an inclusive, supportive engineering culture.

• Lead by example with operational rigor, communication clarity, and accountability.

Required Qualifications:

• 12+ years of experience in large‑scale IP networking, WiFi, or distributed systems engineering.

• Expert-level proficiency in IP networking technologies (IPv6, BGP, OSPF, ECMP, DNS, DHCP, NAT/CGNAT).

• Deep hands‑on experience with F5 BIG‑IP (LTM, DNS/GTM, WAF/ASM, APM).

• Strong WiFi expertise including 802.11 standards, WPA3, Passpoint/Hotspot 2.0, roaming protocols, RADIUS, and EAP.

• Proven experience designing and operating carrier‑grade, highly available, and secure platforms.