Senior Software Engineer

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 a 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. Employees hustle, commit and dedicate themselves to pillars that make up the Nexxen Way – the 3

Cs - Customer Centric, Curious Mindset, Collaborative with No Ego.

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We are seeking a Senior Software Engineer to design and 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 NY or Baltimore local office. Our team follows a hybrid schedule, working in the office three days a week and remotely for the rest.

• Design and develop high-performance distributed systems handling large-scale bid request traffic with sub-100 ms latency requirements.
• Build and optimize real-time bidding (RTB) services that evaluate targeting rules, campaign budgets, and bidding strategies in real time.
• Architect microservices and event-driven systems that support billions of daily ad transactions.
• Build systems to support server-side auctions and bid optimization strategies.
• Integrate with external Supply Side Platforms (SSPs), exchanges, and ad servers using industry standards such as OpenRTB and VAST.
• Develop robust APIs and connectors for partner integrations and supply onboarding.
• Troubleshoot and optimize integration performance with external ad tech platforms.
• Optimize systems for extreme throughput, low latency, and high reliability.
• Implement efficient caching layers and in-memory data stores using technologies such as Redis, Mongo
  
  DB, etc.
• Monitor and improve system performance through observability, load testing, and capacity planning.
• Collaborate with product managers, ad operations, and partner engineering teams to deliver new platform capabilities.
• Provide technical leadership in architecture reviews, system design, and performance optimization.
• Mentor junior engineers and contribute to engineering best practices across the organization.
• 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.
• Take ownership of your personal development by keeping up with the latest backend technologies, tools, and best practices. Continuously improve…