Enterprise application architecture, digital illustration, PDF document, modern office background, wooden desk, leather chair, floor lamp, professional atmosphere, mature businessman, suit, tie, glasses, beard, hands on keyboard, laptop screen displaying diagrams, charts, and flowcharts, multiple windows open, complex system design, layered architecture, microservices, APIs, database integration, cloud computing, virtualization, infrastructure, detailed diagrammatic representation, 3D visualization, isometric view, soft lighting, subtle shadows, professional color scheme.