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 SummaryResponsible for designing and executing test environments for Quality Assurance Engineers. Tests products, software and web applications to ensure quality and a successful roll-out. Assists in managing project teams, developing test strategies and designing quality assurance practices. Leads Engineering teams in investigation processes which includes identifying, reproducing and resolving defects, bugs, or problems. Recognized as an expert in own area within the organization. Provides guidance and mentorship to junior Engineers.Job Description*This position is unable to provide work authorization sponsorship or immigration support now or in the future.*The Technology + Product organization works at the intersection of media and technology and our innovative teams are continually developing and delivering products and next-generation technologies that transform the customer experience.About the Role:We are seeking a highly skilled and motivated Principal DOCSIS QA Engineer with deep expertise in DOCSIS and PON technologies, exceptional Python programming skills, and strong experience in test automation frameworks. This role is critical for driving quality assurance in cloud-native, microservices-based applications supporting broadband infrastructure. The engineer will work closely with both internal teams and external stakeholders, including the Harmonic team (remote), as well as chief teams and manual testing teams, to gather requirements and implement automation test cases. Strong cross-functional communication and coordination skills are essential.What You’ll Do:<ul><li>Act as a key contributor in ensuring the delivery of high-quality, scalable, and reliable DOCSIS/PON-based applications.</li><li>Collaborate remotely with the Harmonic team, chief engineering teams, and manual QA teams to gather test requirements and translate them into automated test cases.</li><li>Design, develop, and maintain Python-based test automation scripts leveraging internal automation frameworks.</li><li>Lead or contribute to the development and enhancement of modular, scalable automation frameworks that support both functional and integration testing.</li><li>Manage operational quality and contribute to the Core Virtualization project by applying robust testing methodologies and practices.</li><li>Troubleshoot complex system issues through strong analytical and debugging skills.</li><li>Participate in Agile ceremonies, integrate QA into DevOps pipelines, and ensure a shift-left approach to testing.</li><li>Operate in a fast-paced, collaborative environment, actively mentoring junior team members and promoting best practices in QA.</li></ul>Skills &amp; Experience We’re Looking For:<ul><li>Strong hands-on Python programming skills – must be able to design and develop complex automation logic and frameworks.</li><li>Experience working with Ubuntu/Linux environments and comfort with CLI-based tools and scripting.</li><li>Proficiency with test tools such as Ixia, ByteBlower, and general traffic simulation platforms.</li><li>Solid understanding of networking concepts, including switching, routing, and network protocols (e.g., TCP, UDP, BGP, ISIS, HTTP/S, multicast).</li><li>Experience with Kubernetes, Docker, and containerized test environments.</li><li>Ability to analyze packet captures, simulate network conditions, and validate end-to-end performance.</li><li>Familiarity with CI/CD tools like Jenkins, GitLab CI, and version control using Git.</li><li>Ability to clearly communicate technical issues and solutions with internal and external stakeholders.</li></ul>Additional Preferred Qualifications:<ul><li>BS or MS in computer science, networking, or related field (or equivalent experience).</li><li>Hands-on experience with Arris/Cisco/Juniper/Arista switch environments.</li><li>Understanding of Redis, Kafka, and microservices-based environments.</li><li>Familiarity with network observability tools (e.g., ELK stack, Prometheus, InfluxDB, Grafana, Splunk).</li><li>Knowledge of test-driven development, continuous integration, and deployment automation best practices.</li><li>Experience working with asynchronous systems, message brokers, and distributed services.</li><li>Exposure to protocol buffers, JSON, XML data formats.</li><li>Previous experience in broadband technologies (DOCSIS, PON) is a strong plus.</li></ul>Team Culture &amp; Values:<ul><li>Mutual respect, trust, and openness to ideas.</li><li>Continuous improvement through experimentation and learning.</li><li>Technical leadership and mentorship with a growth mindset.</li><li>Strong ownership, accountability, and collaborative spirit.</li><li>Balance between technical rigor and simplicity.</li><li>Enjoyment in our work with a healthy work-life balance.</li></ul><h2>About Our Perks &amp; Benefits:</h2>We are determined to create an environment where our employees feel valued, understand our business goals, and are motivated.Heres a look at just some of the perks and benefits we make available to our US-based employees:<ul><li>Medical &amp; Dental</li><li>401(k) Savings Plan</li><li>Generous paid time off</li><li>Life Milestones - from adoption assistance, childcare resources, pet insurance, and more, Comcast supports you at all life stages.</li><li>Courtesy Services - We offer all full-time employees in serviceable areas free digital TV and internet.</li><li>Discount tickets for Universal Resorts, including theme park tickets and onsite hotel rooms.</li></ul>Learn more at <a href="https://jobs.comcast.com/benefits" target="_blank">https://jobs.comcast.com/benefits</a><h2>Reasonable Accommodation</h2>We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, perform essential job functions, and receive other benefits and privileges of employment. Please contact us to request an accommodation.<h2>Disclaimer:</h2><ul><li>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.</li></ul>Comcast is an EOE/Veterans/Disabled/LGBT employer.Job Profile: Engineer 5, Quality AssuranceSkillsAutomation, Python (Programming Language), Quality Assurance (QA), Test Automation ToolsWe 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. Thats 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 <a href="https://jobs.comcast.com/benefits" target="_blank">benefits summary</a> on our careers site for more details.EducationBachelors DegreeWhile 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 Experience10 Years +Comcast is proud to be 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.