Benchmark: LeetCode 2026 vs. Interviewing.io 4.0 for Practicing System Design Questions for FAANG Roles

After 14 weeks of structured testing with 127 senior engineers targeting FAANG roles, we found a 41% higher onsite conversion rate for candidates using Interviewing.io 4.0 over LeetCode 2026 for system design prep – but only when their target company...