Sr. Java Developer (Level 4)

Comcast Philadelphia, PA

About the Job

Business Unit:

Job Summary:

The Xfinity Digital Home team is seeking aSr. Java Developerto join our team to provide a robust and intuitive customer experience through the TV (X1 platform).This group is responsible for ensuring the timely development, testing, and release of Xfinity Home Security & Automation interactive products with a high degree of quality that exceeds customer expectations.

This is a great opportunity for talented engineers to work on cutting edge technologies and features in the exciting Home Security & Automation space. Be a part of leveraging the ever-growing network of IoT devices that create the cohesive experience in the modern home.

In this role, you will collaborate with other X1, mobile, web and embedded systems developers, designers, testers, tech-operators and business managers. You will be joining the growing and exciting world of Home Security and Automation. This will be a great opportunity to work with cutting edge technologies in software and in the IoT (Internet of Things) space. While the primary responsibilities will include developing features for existing X1 apps, you will have opportunities to contribute to all aspects of the product. You must be able to pick up new languages and technologies quickly, be a strong team player, and rapidly adapt to changing business and customer demands. The ideal candidate will have experience building applications using Java, HTML/CSS, JS that rely on multiple web services and that operate at scale (millions of users) as well as home automation devices and wireless mesh networks. As a Senior engineer, you will guide the team in all technical decisions throughout the design, development and release phases. Innovation is a big part of the role as well as mentoring/coaching junior members of the technical staff.


  • 7+ yrs professional experience creating large-scale applications that served large customer base; Proven working experience in Java development
  • BS/MS degree in Computer Science, Engineering or a related subject
  • Proven hands-on Software Development experience
  • Hands on experience in designing and developing applications using Java EE platforms
  • Object Oriented analysis and design using common design patterns.
  • Profound insight of Java and JEE internals (Classloading, Memory Management, Transaction management etc)
  • Familiarity with common libraries and MVC architectural pattern
  • Experience in using java multithreading techniques for building fluid front end user experiences
  • Familiarity in media streaming technologies and protocols (WebRTC, RTSP, HLS etc.)
  • Knowledge of source control systems (GitHub, Gerrit)
  • Knowledge of Continuous Integration and Deployment tools (Jenkins, AntHillPro)
  • Experience in caching especially in HTTP compliant caches.
  • Deep understanding of the HTTP protocol
  • Experience with Agile/Scrum
  • Experience with automated web application testing tools (Jasmine, Teaspoon, Cucumber)
  • UNIX background (Solaris/Linux)
  • DevOps experience
  • Experience presenting technical material to technical and non-technical audiences
  • Experience mentoring junior members of the technical staff
  • A strong sense of ownership and responsibility for code quality that follows best practices
  • A strong passion for learning and adapting to new technologies
  • Ability to think critically and independently
  • Regular, consistent and punctual attendance
  • Other duties and responsibilities as assigned


  • Experience in building X1/web applications
  • Extensive experience with: Ruby on Rails, HTML5, XML, CSS 3, Javascript, Jquery, AJAX and Java, web standards, browser compatibility/workarounds, accessibility laws and development techniques, HTTP and RESTful web services
  • Experience building accessible, cross-platform web sites and web applications
  • Experience with DevOps, Automated Testing and Continuous Delivery
  • Experience working with Internet-of-things frameworks or platforms (SmartThings, Nest, AWS IOT, etc.)
  • Familiarity with wireless mesh networking (ZigBee, Z-Wave, Thread, etc.)
  • Experience building/operating applications dependent on large-scale (>1MM users) platforms with high availability

Digital Home Engineers are passionate about teamwork, developing our skills, and creating awesome experiences for customers. We are fortunate to do what we love, every day. Join us!

Comcast is an EOE/Veterans/Disabled/LGBT employer