Three-tier database architecture, complex system diagram, blueprints scattered around, 3D modeled servers, routers, switches, dark blue circuit boards, shining metal casing, LED lights, cables tangled together, messy workspace, papers stacked high, coffee cups, empty pizza boxes, exhausted IT engineer, sitting, leaning back in chair, hands behind head, staring at screens, multiple monitors displaying code, graphs, charts, debug logs, dim office lighting, evening atmosphere, realistic textures, detailed background.