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World's Fair 2025

Google Photos Magic Editor: GenAI Under the Hood of a Billion-User App - Kelvin Ma, Google Photos

Kelvin Ma , Google Photos

Overview

This talk details the engineering journey behind Google Photos' Magic Editor, highlighting the transition from on-device ML models to server-side generative AI. It emphasizes the challenges and learnings in integrating cutting-edge AI into a widely used application, focusing on user experience, model efficiency, and the inherent unpredictability of AI systems. The core thesis is that while AI offers powerful new capabilities, successful product integration requires rigorous engineering to manage its randomness and deliver reliable, user-friendly features.

Who should watch

Key takeaways

Notable quotes

Kelvin Ma stated that *AI engineering is software engineering but with machine learning or ML on top. And to me ML is this great power but it also adds a lot of randomness into your system.*
He also noted, *Prompt is a bug, not a feature. You want it to be easy to use. A user doesn't want to look at a prompt and think about what they want in a very detailed way.*

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Unofficial community note. Prefer the recording for nuance.