Cloudflare Software Engineer interview experience

The process was remote for a US SWE role and it centered on a technical flow that went from a phone screen straight into a coding round, then a system design interview. The coding prompts were tied to rate limiting: I was given a 3Sum-style warmup extended to 4Sum, and then a more realistic rate-limiter function problem with a signature that included things like IP, method, path, userId, and tenantId, pushing toward progressively more specific limits.

For system design, the prompt was essentially to design a Twitter-like system, which made the round broader than the coding exercise but still