Software Engineer 1 - DSP Runtime

We are seeking a Software Engineer I to build core components of our Demand Side Platform (DSP) that powers real-time programmatic advertising. The role focuses on developing high-throughput, low-latency distributed systems capable of processing billions of bid requests per day while delivering optimized bidding decisions within strict latency constraints. You will experiment with new and innovative technologies designed for Programmatic Ad serving and Ad Tech solutions. You will work on the core bidding infrastructure, targeting systems, and integrations with supply partners to drive efficient ad delivery and maximize campaign performance. This role will be based in our NYC local office. https://nexxen.com/our-locations/Our team follows a hybrid schedule, working in the office three days a week and remotely for the rest. Each day can be different here at Nexxen, but some of the things you can expect to be doing daily are: What You’ll Do: - Design and develop high-performance distributed systems handling large-scale bid request traffic with sub-100ms latency requirements. - Build and optimize real-time bidding (RTB) services that evaluate targeting rules, campaign budgets, and bidding strategies in real time. - Implement efficient caching layers and in-memory data stores using technologies such as Redis, MongoDB, etc. - Monitor and improve system performance through observability, load testing, and capacity planning. - Develop and maintain reliable, scalable, and efficient backend services using modern technologies and frameworks - Write high-quality, well-tested code that is maintainable and adheres to best practices in software engineering - Analyze data to drive decision making and assess the impact of system changes. - Follow agile methodologies and work in a fast-paced environment where results are quickly visible What You’ll Bring: - Bachelor's degree in computer science, Software Engineering, or related field. 2+ years of professional software development exp