Designing Scalable and Maintainable Cloud-Native Applications Using the 12-Factor App Methodology

This review paper examines the core principles of the 12-Factor App methodology, with a focus on their application in Java-based, cloud-native development. These principles are analyzed in the context of containerized infrastructures and modern deployment pipelines. They are selected for their practical relevance to container orchestration and continuous delivery workflows, while broader architectural guidelines are discussed at a conceptual level. Aimed at software architects, developers, and DevOps practitioners, the paper explores implementation practices using technologies like Spring Boot, Kubernetes, and CI/CD tools, demonstrating how the 12-Factor approach applies to both microservices and monolithic architectures. Common challenges and anti-patterns are addressed to help practitioners avoid frequent implementation pitfalls. By bridging theoretical principles with real-world practices, this review supports the development of scalable, maintainable, and resilient applications in modern cloud environments.