Like LeetCode

Loop Prep offers progressive coding challenges inspired by technical interviews at major AI labs and tech companies. Unlike traditional single-function problems, challenges unfold across multiple steps—building complexity incrementally from basic functionality to advanced features like expiration, transactions, and atomic operations.

Designed to simulate how engineers actually solve problems at companies like Anthropic, OpenAI, Meta, Snowflake, and Databricks. Each completed step unlocks the next, creating a realistic progression toward production-ready code.