Development Engineer 3

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
We are hiring an Engineer 3 - Senior Software Engineer with strong, hands-on software engineering expertise and a passion for building scalable backend systems, shared services, and internal platforms. This is a highly hands-on, development-first role, not a coordination or oversight position. You will be expected to design, build, and own production-grade systems end-to-end, writing significant amounts of high-quality code while driving system design and architectural decisions. You will work on core engineering problems that impact multiple teams, improving reliability, scalability, performance, and developer productivity through well-designed, extensible software solutions using Go, Java, or Python.
Job Description
Role Overview
We are hiring an Engineer 3 - Senior Software Engineer with strong, hands-on software engineering expertise and a passion for building scalable backend systems, shared services, and internal platforms.
This is a highly hands-on, development-first role, not a coordination or oversight position. You will be expected to design, build, and own production-grade systems end-to-end, writing significant amounts of high-quality code while driving system design and architectural decisions.
You will work on core engineering problems that impact multiple teams, improving reliability, scalability, performance, and developer productivity through well-designed, extensible software solutions using Go, Java, or Python.
What We're Looking For (Must-Have)
Strong Hands-On Development Expertise

• Deep, hands-on software development experience in at least one of Go, Java, or Python (with the ability to work across others when needed)
• 5+ years of professional experience as a Software / Application Development Engineer, with substantial time spent writing and maintaining production code
• Demonstrated ability to lead by example through code, not just design or reviews

Design, Architecture & System Ownership

• Proven experience designing, building, and owning:
  • Backend services and APIs
  • Shared libraries, frameworks, or internal platforms
  • Scalable, reliable, distributed systems
• Strong command of:
  • Core software design principles (OOP, SOLID, clean architecture, modular design)
  • System design, service boundaries, and architectural trade-offs
  • Scalability, performance optimization, and fault tolerance

Engineering Fundamentals & Quality

• Strong foundation in:
  • Data structures, algorithms, and problem-solving
  • Writing efficient, maintainable, and testable code
• High bar for:
  • Code quality, automated testing, documentation, and maintainability
  • Writing production-ready software that balances correctness, performance, and readability

Ownership & Execution

• Experience owning features or systems through the full lifecycle:
  • Technical design and reviews
  • Implementation and testing
  • Production rollout and ongoing maintenance
• Proven ability to diagnose and resolve complex production issues

What You'll Do

• Design, develop, and maintain backend services and core application components
• Write significant amounts of hands-on code in Go, Java, or Python
• Build and evolve shared libraries, frameworks, and internal platforms used across multiple teams
• Apply strong software architecture and design principles to solve non-trivial engineering problems
• Improve system scalability, reliability, and performance through thoughtful design and implementation
• Participate actively in:
  • Technical design discussions
  • Architecture and code reviews
  • Key engineering decisions
• Partner with product and application teams to deliver robust, scalable, production-ready solutions
• Perform high-quality code reviews, mentor junior engineers, and raise the overall engineering bar
• Take technical ownership of critical components and drive their long-term architectural evolution

Nice to Have (Optional)

• Experience designing or operating large-scale distributed systems
• Exposure to cloud-based application architectures (AWS, GCP, Azure, or equivalent)
• Familiarity with:
  • Performance tuning, profiling, and capacity planning
  • Observability, monitoring, and debugging from an application perspective
• Experience influencing:
  • Architectural standards
  • Shared platforms or engineering best practices
• Background in building developer-facing APIs, SDKs, or internal platforms at scale

What Success Looks Like at SDE-3 Level

• You are a hands-on senior engineer who drives outcomes through code and design
• You independently own complex systems and make sound architectural decisions
• You consistently raise the quality, reliability, and scalability of the systems you touch
• You influence other engineers through technical depth, clarity, and execution, not authority

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.
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
5-7 Years