Principal Machine Learning Engineer, AI Recommendation and Search

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
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. The AI Search and Recommendation team is seeking a visionary and hands-on Principal Engineer to drive the conception, architecture, development, and delivery of next generation AI/ML products and platforms across Comcast, Sky, and NBCUniversal. The ideal candidate bridges deep technical expertise with strategic business acumen, pairing research-grade rigor with production-grade execution.
Job Description
Core Responsibilities

• Guide the successful completion of high-profile, revenue-impacting programs that use machine learning as essential components.
• Act as a subject matter expert in designing and prototyping complex ML models and frameworks; lead innovation in technical capability delivery and platform standards.
• Lead design and implementation of ML applications and platforms within one or more product areas; partner with product, engineering, and operations through development.
• Maintain a very hands-on approach; contribute code to core and experimental projects; be heavily involved in code reviews and technical deep dives.
• Engage in cross-crew projects that drive substantial business and technical outcomes; set quality bars (testing, reliability, security, performance, documentation) and proactively improve them.
• Identify and develop new business opportunities leveraging emerging AI/ML tech.
• Establish best practices and knowledge bases to guide future innovation.

Qualifications

• Master's Degree in Computer Science, Electrical Engineering, or related field (Ph.D. preferred).
• 10+ years leading R&D or platform engineering initiatives in technology-driven organizations
• Proven experience in AI/ML, Cloud Computing deep knowledge of distributed systems and MLOps (feature stores, model registries, pipelines, monitoring for data/concept drift).
• Strong coding proficiency in Python; excellence in code quality, testing, performance, and reliability.
• Demonstrated success translating research into viable business solutions or product lines; ability to turn ambiguity into iterative, testable plans.

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.
• Respect and promote inclusion & diversity.
• Do what's right for each other, our customers, investors and our communities.

Education
Master'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
10+ 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.
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:
Machine Learning (ML); Business Acumen; Cross-Team Collaboration; Technical Leadership; Problem Solving; Team Mentoring; Communication
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
10 Years +