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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 experience (or equivalent practical experience). Strong programming skills in languages such as Java, Scala or Similar language. Experience with object-oriented programming (OOP) principles and software design patterns. Familiarity with microservices architectures, REST/gRPC APIs, and asynchronous processing. Familiarity with back-end technologies (back-end frameworks (Spring Boot etc.) - Familiar with distributed systems concepts. - Familiar with real-time streaming technologies like Kafka or Kinesis - Experience working with relational or NoSQL databases such as MySQL, PostgreSQL, MongoDB, or SQL Server. - Knowledge of version control systems, especially Git. - Good understanding of RESTful APIs, microservices, and web application architecture. - Familiarity with cloud platforms such as AWS, Azure, or Google Cloud is a plus. - Experience with Agile/Scrum development methodologies. - Strong problem-solving, debugging, and analytical skills. - Experience working within a Linux environment. - Strong analytical and problem-solving abilities. - Excellent communication and teamwork abilities. Who is Nexxen? Flexible advertising, unified by data. Nexxen empowers advertisers, agencies, publishers and broadcasters around the world to utilize data and advanced TV in the ways that are most meaningful to them. Our flexible and unified technology stack comprises a demand-side platform (“DSP”) and supply-side platform (“SSP”), with the Nexxen Data Platform at its core. With a global footprint, you can be part of a team that is transforming advertising through our creative, flexible and unified solutions. Why join the Nexxen team? With a global footprint, you can be part of a team that is transforming advertising through our creative, flexible and unified solutions. Employees hustle, commit and dedicate themselves to pillars that make up the Nexxen Way – the 3Cs - Customer Centric, Curious