Principal Engineer, Time Shifted Video Engineering Group

Comcast Denver, CO

About the Job

Business Unit:

Do you love to write code? Are you passionate about software craftsmanship? Would you like to work on projects with tangible impact?

As a software engineer in Time Shifted Video Engineering Group, you will help to shape the next generation cloud based, highly scalable DVR service. You will develop the software to handle recordings and playbacks for millions of customers, to support Instant VOD, and develop tools to operate such large scale system at low cost.

Who does the Time Shifted Video software engineer work with?

Time Shifted Video software engineers collaborate with industry experts from many disciplines: software architects, network engineers, big data scientists, player developers, content security specialists, and various streaming video technologists. A Time Shifted Video software engineer also engages with quality assurance engineers, technical operators, and product owners on a daily basis. We're a small team, delivering software solutions at the leading edge of distributed systems and streaming video technology.

What are some interesting problems you'll be working on?

The core product this team is developing and managing is the next generation cloud DVR system (cDVR). We developed this system from the ground up. The system will support millions of customers to record their favorite TV shows in the cloud, which enables them to watch their recordings from any device, at anytime, and anywhere with an Internet connection. You will help to develop new features and improve existing software to scale this system to support real-time recording of 8 terabytes of video per second. You will also help to develop different tools to deploy and manage the system at multiple locations and work with different teams to ensure the system runs smoothly. Your work will make a noticeable impact on the rapidly expanding IP video industry and millions of customers' experience.

Where can you make an impact?

Your code will process the video content that is distributed to tens of millions of devices, all day, everyday. The systems you design and build will enable first-to-market product features. You can help influence leading edge cloud technology and streaming video technology standards with real world lessons learned by being a first implementer. Replace expensive vendor provided solutions with better, more stable, more scalable, more operable platforms, and see that your individual contributions will have multi-million dollar impacts to the bottom line.


  • Design, develop, and maintain software applications to support new features. Improve existing software's performance and stability. Ensure software architecture is lean and extensible. Ensure software modules are reliable and simple for reuse.
  • Take ownership of new features and see them through to production in a timely manner.
  • Improve software update and deployment processes. Assist in the rollout of software releases.
  • Collaborate with project stakeholders to identify product and technical requirements. Perform analysis to determine integration needs.
  • Work with the Quality Assurance team to determine if applications meet specifications and technical requirements.
  • Diagnose system performance issues, demonstrate scalability with load generation tools, propose and implement code and system improvements to achieve desired system performance.
  • Operate and monitor production systems, propose improvements, develop tools to help lower the operational cost and increase the efficiency.
  • Be a team resource to help research and adopt new technologies and methodologies that are relevant to our problem space.
  • Be a good mentor to junior team members.
  • Define and refine team processes and practices.

Here are some of the specific technologies we use for Time Shifted Video Engineering Group:

  • Go (golang)
  • Python 3
  • C
  • C++
  • Linux (CentOS)
  • Javascripts
  • Git
  • Apache httpd and the Apache Portable Runtime
  • Redis
  • MongoDB
  • OpenStack
  • MemSQL
  • Kubernetes
  • Docker
  • Zookeeper

Skills & Requirements

  • BS in Computer Science and 10+ years equivalent experience; MS in Computer Science highly preferred
  • Experience in programming languages Java and C/C++. Experience with Go (golang) highly desired
  • Experience developing software for Networking, Web services, HTTP, and TCP/IP
  • Experience with distributed systems
  • Extensive knowledge of Object Oriented Design, Design patterns, and Algorithms
  • Understanding of RESTful design principals
  • Experience developing multi-threaded and high performance software
  • Experience developing software on and for multicore Linux machines
  • Experience with Docker and Kubernetes is a plus
  • Experience with FFMPEG, HLS, HDS, MPEG-DASH, MPEG-2, MPEG-4, and H.264 compression is a plus
  • Good communicator; able to analyze and clearly articulate complex issues and technologies in a clear and precise way
  • Great design and problem solving skills, with a strong inclination towards architecting at scale
  • Strong troubleshooting skills, adaptable, proactive and willing to take ownership
  • Has a Devops mindset
  • Able to work in a fast-paced environment

About Comcast VIPER (Video IP Engineering & Research)

VIPER(Video IP Engineering & Research), is a startup division within Comcast's Technology and Product Division and spun out from IP Video and online projects originated within Comcast Interactive Media is based in downtown Denver, CO. We are a cloud-based, IP video infrastructure that's been built to deliver a broad mix of on-demand video, live TV streams and an assortment of other digital media to an array of connected devices in the home.

Comcast is an EOE/Veterans/Disabled/LGBT employer