Lead Software Engineer- Englewood, CO or Sunnyvale, CA- ONSITE 4X Weely- FreeWheel

Comcast Corporation; Colorado; On-site; USD 160,000 - 240,000; Full time

Benefits offered by this job

Bonus

Benefits

Job summary

FreeWheel, part of Comcast, is seeking a Lead Software Engineer to drive the architecture of the Buyer Cloud Ad Serving platform. The role focuses on building highly scalable, low-latency backend services for a DSP backbone that handles billions of auctions with millisecond responses.

The ideal candidate has 13+ years of software engineering experience, including 2+ years in a Staff/Lead role, and expert-level skills in C++, Go, Java, or Rust, plus distributed systems expertise.

Qualifications

• Bachelor's or Master's in Computer Science, Engineering, or related field.
• 13+ years of professional software engineering experience, including 2+ years in a Staff or Lead Engineer role.
• Expert-level proficiency in C++, Go, Java, or Rust and distributed systems design.

Responsibilities

• Architect end-to-end architecture for highly scalable, low-latency backend services.
• Drive multi-team initiatives focused on platform reliability, scalability, and operational excellence.
• Identify and eliminate performance bottlenecks in distributed workflows with strict latency budgets.
• Collaborate with Product, Infra, SRE, and Data Engineering to define roadmaps and align technical strategy.
• Establish best practices for design reviews, code quality, testing, observability, and RCA.

Skills

C++

Go

Java

Rust

Distributed systems

Concurrency

Education

Bachelor's or Master's in Computer Science or related field

Tools

AWS

Kubernetes

ECS

Linux

Job description

**Job Summary**FreeWheel is seeking a Lead Software Engineer (ENG 5) to serve as a principal-level individual contributor driving the technical direction of our Buyer Cloud Ad Serving platform. The Ad Serving system is the high-throughput backbone of FreeWheel's demand-side platform (DSP). It processes billions of ad auctions daily, executes complex real-time decisioning strategies, and delivers responses in single-digit milliseconds. In this role, you will lead the architecture of mission-critical distributed systems, tackle complex performance and scale challenges, and influence engineering practices across multiple teams all without direct people management responsibilities**Job Description****Responsibilities:** * **Architectural Leadership:** Lead the end-to-end architecture, design, and execution of highly scalable, low-latency backend services for the Buyer Cloud platform.* **Strategy:** Drive multi-team initiatives centered on platform reliability, system decomposition, scalability, and operational excellence.* **System Optimization:** Identify and eliminate performance bottlenecks in distributed workflows operating under strict latency budgets.* **Cross-Functional Partnership:** Partner with Product, Infrastructure, SRE, and Data Engineering to define technical roadmaps and align technical strategy with business goals.* **Engineering Standards:** Establish best practices for design reviews, code quality, testing, observability, and incident root-cause analysis (RCA).* **Mentorship & Talent Growth:** Mentor senior and mid-level engineers through design coaching, code reviews, and architectural guidance.* Consistent exercise of independent judgment and discretion in matters of significance.* Regular, consistent and punctual attendance. Must be able to work nights and weekends, variable schedule(s) as necessary.* Other duties and responsibilities as assigned**The Ideal Skillset:*** **Education:** Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field (or equivalent practical experience).* **Experience:** 13+ years of professional software engineering experience, including 2**+ years** in a Staff or Lead Engineer role.* **Core Languages:** Expert-level proficiency in compiled/high-performance languages (**C++**, **Go**, **Java**, or **Rust**).* **Distributed Systems:** Proven track record of designing, operating, and troubleshooting large-scale distributed backend systems in production.* **Systems Engineering:** Deep understanding of concurrency, multithreading, memory management, networking protocols, and performance profiling on Linux.* **Cloud & Infrastructure:** Experience building containerized, cloud-native services (AWS, Kubernetes, ECS, or equivalent) with robust observability (metrics, tracing, logging).**Bonus Points:*** Experience with ultra-low-latency, real-time decisioning systems (e.g., AdTech/DSPs, financial trading, real-time analytics, high-frequency auction systems).* Experience handling petabyte-scale datasets or systems processing millions of requests per second (RPS).* Familiarity with distributed datastores and storage platforms (e.g., Aerospike, Snowflake, event streaming architectures).* Demonstrated experience modernizing legacy architectures and driving cloud-native adoption.**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.* Support a culture of inclusion in how you work and lead.* Do what's right for each other, our customers, investors and our communities.**Disclaimer:** This information has been designed to indicate the general nature and level of work performed by employees in this role. It is not designed to contain or be interpreted as a comprehensive inventory of all duties, responsibilities and qualifications.**Skills**AWS Architecture, C++ Programming Language, Go Programming Language, Java (Programming Language), Low Latency**Compensation**Colorado Pay Range: $160,106.35 - $240,159.53This job can be performed in California with a good faith estimated pay range upon hire of $130,996.11 USD - $242,585.38.Comcast intends to offer the selected candidate base pay within the posted range for this role at the time of posting dependent on job-related, non-discriminatory factors such as experience. The application window is 30 days from the date job is posted, unless the number of applicants requires it to close sooner or later.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.