Senior C++ Backend Engineer for Real-Time Ad Platform

Comcast

Chicago (IL)

On-site

USD 153,000 - 229,000

Full time

14 days+

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Job summary

Comcast is seeking a Senior Software Engineer (C++) to join a team delivering a large-scale real-time advertising platform. You will build high-performance backend services, optimize ad delivery decisions, and ensure ultra-low latency across a distributed cloud.

The role emphasizes multithreading, distributed systems, and experience with MySQL and Aerospike, working across multi-region cloud environments.

Qualifications

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 multi threading, 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.

Responsibilities

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 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.