xAI

Design a Push Notification System for New Posts

Design a RAG-Based Chatbot System

ML System Design · Also asked at Databricks, OpenAI

Design a Rate Limiter with Variable User Quotas

Also asked at Amazon, Atlassian +2

Durable KV Cache

Dynamic Batch Inference

Group Test GPU Nodes

Maximum Number of Distinct Elements After Operations

Multi-threaded Array Sort

Nested Structure Flatten and Unflatten

Radix Cache

Transactional Key-Value Store

Twitter Spaces Active Time

Weighted LRU Cache

Also asked at Netflix