AppliedAIPrep logoAppliedAI/Prep
← System Design for AI in Production / 96
hardOpenAIGoogleMicrosoft

Design an A/B testing platform for LLM features (prompts, models, retrieval) with trustworthy metrics.

Experimenting on LLM features is hard because the outputs are open-ended and quality is fuzzy. Learn how to assign traffic, pick metrics that are not just engagement, handle variance from non-determinism, and avoid the traps that make a winning variant lose in production.

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

Experimenting on LLM features is hard because the outputs are open-ended and quality is fuzzy. Learn how to assign traffic, pick metrics that are not just engagement, handle variance from non-determinism, and avoid the traps that make a winning variant lose in production.

Unlock the other 754 answers · ₹2,000 / $25includes both full courses · progress stays saved · 6 months · one payment · no auto-renew
LEARN THE BACKGROUND

No lesson covers this question directly yet. These teach the surrounding topic from the beginning.

Applied AI Engineering·The interviewPremium14mDriving the design conversationA design round is a conversation you are expected to lead, not a question you answer. This lesson is the shape that works, the four moments that decide the outcome, and the two classic ways strong candidates lose one.Applied AI Engineering·The interviewPremium12mTurning this course into a study planA concrete four-week plan mapping the seven modules onto the question bank, plus what to do differently if your interview is next week rather than next month.
UP NEXT ON YOUR JOURNEY
Next in this trackDesign a RAG-as-a-service platform that lets teams build retrieval-augmented apps over their own data.Next in this trackDesign a real-time speech translation system (speak in one language, hear another) with low latency.Next in this trackDesign a notification and fan-out system that delivers to millions of users across push, email, and SMS.
DISCUSSION · 0

No comments yet — be the first to share your approach.