Enterprise mobile app platform on Azure integrates React Native frontend with ASP.NET Core Web API, OAuth token authentication, and Entity Framework Core ORM for secure data access. Requests flow from the mobile app through the security layer via HTTPS to API Controllers, which route to Business Services and coordinate with the Data Access Layer for database operations on Azure SQL Server. The architecture demonstrates layered separation of concerns—Presentation, API, Business Logic, Data Access, and Database—enabling maintainability and scalability. Azure DevOps orchestrates the entire CI/CD pipeline: developers commit to Azure Repos, trigger Azure Pipelines, and deploy to Azure App Service with full traceability via Azure Boards. Fork this diagram to customize authentication schemes, add caching layers, or extend to multi-region deployments.