Most Jenkins deployments under traditional methods of deployment struggle to scale, control infrastructure, and achieve high availability. This talk is about changing that by deploying on Amazon Web Services' Elastic Container Service (ECS). With the controller for Jenkins containerized and ephemeral build agents dynamically provisioned on ECS on-demand, teams can cut way back on the overhead of the infrastructure and drive flexible auto-scaling based on demand from their pipelines. We delve into some of the most important architectural elements, such as persistent storage through EFS, secure communication across NLB, and monitoring centrally using CloudWatch. Learners will develop hands-on knowledge of how to configure ephemeral agents through Fargate, tune performance, implement security with IAM roles and AWS Secrets Manager, and achieve cost-saving with spot instances. This strategy not only improves CI/CD effectiveness but also enhances resilience and operational visibility. At the end of the session, participants will know how Jenkins on ECS facilitates cloud-native DevOps workflows with scalable, secure, and maintainable automation pipelines. Key Takeaways: How to containerize Jenkins effectively Optimizing costs using spot instances Ensuring high availability and auto-scaling with ECS