Collector Bank, a leading digital niche bank in the Nordics, has successfully transitioned its technological infrastructure to the Microsoft Azure Cloud, leveraging Elasticsearch as a pivotal tool for innovation and efficiency. Over the past three years, Elasticsearch has transformed the bank’s logging and data visualization processes, enabling rapid development and improved service quality. Initially reliant on various systems for payment solutions and loans, the bank integrated Elasticsearch to enhance log searchability and system correlation, fostering a more effective workflow. Today, with 18 development teams, Collector Bank employs Kibana dashboards for real-time monitoring and alerts, supported by devops tools like PagerDuty and Slack. The architecture involves Azure Web Apps and Event Hubs, utilizing C# and Serilog for logging, and addressing challenges such as data type collisions with a suffix strategy. Looking ahead, the bank plans to deploy Elastic Cloud Enterprise for enhanced cluster management and security, and explore machine learning for fraud detection and a digital document archive, ensuring compliance with upcoming GDPR requirements.