Elasticsearch plays a crucial role in Adyen's payment platform, powering essential functions such as payment search, monitoring, and log retrieval. By leveraging Elasticsearch's distributed nature, speed, and scalability, Adyen provides merchants with near real-time payment search capabilities, allowing them to quickly verify successful transactions. The company employs an in-house streaming/consumer framework to efficiently index data into Elasticsearch, ensuring that processed payments are promptly searchable. For platform monitoring, Adyen uses the Elastic Stack to create solutions that deliver real-time alerts and end-to-end monitoring for various use cases across teams. This system integrates customizable monitors and analytical events to detect issues such as transaction spikes or anomalies. Additionally, Elasticsearch supports Adyen's log management infrastructure, aiding in troubleshooting and maintaining operational continuity. A recent smooth migration from Elasticsearch v1.7 to v7.6 with 12TB of data highlights its integral role in Adyen's architecture.