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# Lead Software Engineer (C++) - Ad Tech & Distributed Systems - FreeWheel

- **Company:** Comcast
- **Location:** Chicago, IL, United States
- **Experience:** Expert
- **Salary:** $152,829.0 - $229,243.0
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Application Performance Management, Microsoft Azure, C++ (Programming Language), Cloud Computing, Code Review, Databases, Data Security, Relational Databases, Database Queries, Disaster Recovery, Distributed Data Store, Distributed Systems, Memory Management, Failover, Python (Programming Language), MySQL, Performance Tuning, Service-Oriented Architecture, Software Engineering, Aerospike, Multithreading, Real Time Systems, System Availability, Snowflake, Concurrency, Reliability of Systems, Backend, Information Technology, Low Latency, Apache Kafka, Opsworks, Microservices
- **Published:** October 26, 2026
- **Apply:** https://www.chicagocareersite.com/job.asp?id=3467457276&tx=TT4643TTI&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* Bachelor's degree in Computer Science, Engineering, or equivalent practical experience.
 * 5+ years of professional software development experience using C++ .
 * Experience building and supporting high-volume, high-concurrency distributed systems .
 * Strong understanding of multithreading, concurrency, memory management, and performance optimization.
 * Experience designing and operating low-latency, real-time applications .
 * Knowledge of cloud platforms including AWS, Azure, or GCP .
 * Experience working with relational databases, particularly MySQL .
 * Familiarity with distributed data stores such as Aerospike, Kafka, Snowflake, etc .
 * Strong understanding of scalable microservices and service-oriented architectures.
 * Experience with monitoring, troubleshooting, and performance tuning large-scale production systems., C++ Programming Language; AWS OpsWorks; Python (Programming Language); Systems Design, 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.

## Description

We are seeking a Senior Software Engineer (C++) to join a team responsible for building and enhancing a large-scale, real-time advertising platform that operates at massive scale. This role focuses on developing high-performance backend services that process millions of concurrent requests, optimize ad delivery decisions, and maintain ultra-low latency response times across a distributed cloud infrastructure.

The ideal candidate has deep expertise in C++ development, distributed systems, concurrency, and high-throughput application design. You'll work on mission-critical services that sit at the core of the advertising ecosystem, handling complex decisioning logic and real-time integrations with external demand partners and marketplaces., * Design, develop, and optimize high-performance C++ applications that power a large-scale ad serving platform.

 * Build and maintain backend systems capable of processing millions of concurrent requests with low latency and high availability.
 * Develop new platform capabilities while ensuring system stability, scalability, and performance under heavy workloads.
 * Enhance systems that process ad requests, communicate with external bidding partners, evaluate responses, and return optimized decisions in real time.
 * Design and implement resilient distributed services across multi-region cloud environments.
 * Optimize application performance for high Query Per Second (QPS) workloads and high-concurrency traffic patterns.
 * Collaborate with engineering teams to architect failover, disaster recovery, and high-availability solutions.
 * Create efficient database queries and data access layers utilizing MySQL and Aerospike.
 * Troubleshoot performance bottlenecks across application, database, and infrastructure layers.
 * Participate in architecture discussions, code reviews, and technical design initiatives.
 * Monitor and continuously improve system reliability, scalability, and operational efficiency.