Engineer 4, Site Reliability Engineering

Comcast brings together the best in media and technology. We drive innovation to create the world's best entertainment and online experiences. As a Fortune 50 leader, we set the pace in a variety of innovative and fascinating businesses and create career opportunities across a wide range of locations and disciplines. We are at the forefront of change and move at an amazing pace, thanks to our remarkable people, who bring cutting-edge products and services to life for millions of customers every day. If you share in our passion for teamwork, our vision to revolutionize industries and our goal to lead the future in media and technology, we want you to fast-forward your career at Comcast.

Job Summary

This job is responsible for the availability, latency, performance, efficiency, change management, monitoring, emergency response, and capacity planning for platforms. It will engage in designing, analyzing and troubleshooting large-scale distributed systems, debugging and optimizing code and automating routine tasks. It will be part of a team consisting of a mix between software and technology infrastructure backgrounds. It will provide subject matter expertise, resolve complex break/fix scenarios and engage broader teams as necessary. It will partner with engineering, vendors and client services to deliver successful technical solutions. Works with limited supervision and direction while executing associated functions and responsibilities. Follows operational practices and independently determines/develops approaches for non-routine solutions. Integrates knowledge of business and functional priorities. Acts as a key contributor in a complex and crucial environment. May lead teams or projects and shares expertise.

Job Description

Core Responsibilities

  Roaming services IMS Core / SBC expertise, GSMA IR specifications, network configurations

  Experience executing E2E outbound and inbound roaming tests, including call, SMS, and data scenarios.

  Hands‑on experience with core network elements

  Senior Packet Core Engineering experience with Strong troubleshooting skills using signaling traces and logs (MAP, Diameter, SIP, GTP).

 VoLTE roaming testing experience, including SIP signaling, call flows, and LTE call handling.

  Strong knowledge in VoLTE, Core Network specifically voice and SMS troubleshooting, managing end‑to‑end roaming implementation
 IREG experience is added advantage
configuration and troubleshooting of HLR/HSS, STP, DRA, and EPC components.
roaming architecture, protocols (MAP, Diameter, GTP), and GSMA standards (IR.21, IR.85, IR.88)
configuring and managing routers, switches, and firewalls (Cisco, Juniper, Fortinet-good to have
Proficiency in scripting and automation tools (Python, Ansible, Bash) for network orchestration and monitoring. -Good to have
Familiarity with 5G architecture, VoLTE, VoWiFi, and IMS core components.-strong knowledge.-
Certifications such as CCNP, JNCIP, or Nokia NRS II are highly desirable.
Manage end-to-end IREG testing and onboarding of new roaming partners, coordinating with MNOs and third-party vendors.
Own the daily automated testing framework for roaming services, ensuring proactive detection and resolution of service degradation.
Monitor and optimize roaming traffic flows, latency, and throughput across international interconnects.
Strong analytical and problem-solving skills, with the ability to resolve complex network issues across multi-vendor environments.

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.

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 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.

Certifications (if applicable)

Relevant Work Experience

7-10 Years

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.