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Design a text-to-image generation service (Midjourney/DALL-E-like) at scale.

A GPU-heavy generative system where sampling steps dominate the bill and one bad image is a headline. The signal is the diffusion serving pipeline, the cost levers on per-image GPU time, and a mandatory two-sided safety layer.

Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.

A GPU-heavy generative system where sampling steps dominate the bill and one bad image is a headline. The signal is the diffusion serving pipeline, the cost levers on per-image GPU time, and a mandatory two-sided safety layer.

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