Sr. Backend Engineer C++ - Reston 2 Days Hybrid - FreeWheel

Comcast • Reston, VA

2d • Hybrid

About The Position

FreeWheel, a Comcast company, provides advertising platforms for publishers, advertisers, and media buyers. Its video advertising technology helps the television industry monetize premium content across devices and supports high volumes of daily requests and data processing. The Sr. Backend Engineer will help design, build, and support FreeWheel’s video advertising platform, developing backend services and software applications for the platform.

The role includes designing and developing software, supporting updates and releases, collaborating with stakeholders and cross-functional teams, mentoring junior engineers, documenting development work, evaluating software performance, and partnering with Quality Assurance. The position requires independent judgment, regular and punctual attendance, and availability to work nights and weekends on variable schedules as necessary. The posting describes the position as virtual-based, while the title specifies a two-days-hybrid arrangement in Reston.

Requirements

• Bachelor's degree or above; the posting also says applicants with a combination of coursework and experience or extensive related professional experience may be considered.
• At least 3 years of relevant work experience is stated under Required Skills and Experience; the posting separately lists 7–10 years of relevant work experience.
• Strong proficiency in modern C++ and solid knowledge of multithreading, concurrency, asynchronous programming, and memory management.
• Experience designing and developing high-performance, low-latency, highly concurrent backend services.
• Experience with Linux performance profiling, benchmarking, debugging, and system-level optimization.
• Solid understanding of RPC frameworks, HTTP/gRPC protocols, and distributed service architectures.
• Demonstrated problem-solving ability and technical innovation.
• Strong interest in learning and practicing new techniques.
• Skills listed: C++ programming language, collaboration, and new software.
• Must be able to work nights and weekends on variable schedules as necessary.

Nice To Haves

• Familiarity with online machine-learning inference or model-serving frameworks such as NVIDIA Triton or ONNX Runtime.
• Experience with inference scheduling, batching, and CPU/GPU resource optimization.

Responsibilities

• Design new software applications, analyze system requirements, and customize applications to maximize functionality and user experience.
• Assist with software updates and releases, ensuring seamless rollouts of new features.
• Collaborate with stakeholders and cross-functional teams to identify requirements and integrate tailored software solutions.
• Mentor junior engineers and support technical excellence and collaborative knowledge sharing.
• Manage documentation for development activities so information is accessible to technical and non-technical stakeholders.
• Track and evaluate software performance metrics to inform decisions and improve system reliability and user satisfaction.
• Partner with Quality Assurance to verify that software complies with technical specifications.
• Use market research and industry trends to guide project strategies and improve software products.
• Participate in or lead peer programming, design sprints, or prototyping sessions.
• Exercise independent judgment and discretion in significant matters.
• Maintain regular, consistent, and punctual attendance; work nights and weekends on variable schedules as necessary.
• Perform other duties and responsibilities as assigned.
• Follow Comcast's Operating Principles, prioritize customer experience, learn and advocate for its technology and services, work collaboratively, participate in the Net Promoter System, drive results and growth, support inclusion, and act responsibly toward colleagues, customers, investors, and communities.

Benefits

• Eligible employees receive Comcast benefits; the posting directs candidates to the company's careers site for details.
• Most non-sales positions are eligible for a bonus.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior