Modern office interior, 3-tier architecture diagram on a whiteboard, MVC pattern illustration nearby, young male programmer, casual wear, messy hair, thick-framed glasses, holding a marker, standing in front of the board, explaining to colleagues, bright office lighting, minimalistic furniture, wooden table, leather chairs, laptops and notebooks scattered around, coffee cups and empty pizza boxes on the side, cityscape view through the window, afternoon sunlight, soft focus effect.