Modern software architect, middle-aged man, bespectacled, short brown hair, wearing a white shirt, black tie, formal trousers, standing in front of a large whiteboard, filled with complex system diagrams, arrows and boxes, holding a red marker pen, pointing to the board, explaining the design, conference room, city skyscraper, evening, softbox lighting, 3/4 composition, shallow depth of field, realistic, ambient light.