Arpeely operates in the high-speed world of programmatic ad auctions, making billions of rapid decisions daily regarding where and how to advertise and how much to bid, all within milliseconds. This is achieved through a sophisticated data infrastructure built for real-time machine learning (ML) inference and personalization, with a crucial component being a high-performance feature store based on Aerospike. The feature store serves over 300 features per request, enabling Arpeely to make informed, model-driven decisions that consider live and historical user behavior. The system's efficiency and low-latency performance allow for real-time adaptation and A/B testing of features, giving data scientists the freedom to innovate quickly. The use of Aerospike not only meets the demanding performance benchmarks required by Arpeely but also simplifies the engineering complexity associated with scaling, reducing costs and enhancing operational stability. This robust infrastructure empowers Arpeely to maintain a competitive edge in the AdTech industry by ensuring fast and intelligent bidding decisions.