CrackingWalnuts
Checked 3 August 2026. Cloudflare does not publish its interview structure. Everything on this page is commonly reported by candidates, so treat it as a guide rather than a specification.
| Round | Duration | What it tests |
|---|---|---|
| Recruiter Screen | 30 min | Background, target team. |
| Hiring Manager Screen | 30 to 45 min | Team fit, motivation, resume. |
| Technical Phone Screen | 45 to 60 min | Medium DSA or practical task. |
| Code Pair (often extends take-home) | 60 min | Live coding, often reviewing and extending a take-home. |
| System Design | 60 min | End-to-end design with networking and scale framing. |
| Behavioral | 45 min | Feature ownership, curiosity, empathy. |
Targeted guidance per round in this loop. Each section links to the matching track on the site. There is no shortcut list, the bar moves loop to loop, so build the pattern recognition and the stories from real practice.
Work the pattern templates until the recognition is instant. Trace one mock problem per pattern. Practice stating time and space complexity out loud before you write code.
Cloudflare SDE II (Software Engineer, Mid) has one design round: System Design (60 min): End-to-end design with networking and scale framing.. Bar is a clean end-to-end design at modest scale, with a sensible API and one trade-off discussion. Pick problems from the track at the scale this loop tests and rehearse the structure: requirements, numbers, high-level design, data model, API, deep dive on one part, trade-offs.
Junior bar. You now have real production work. Stories should center on features you owned, bugs you debugged, and how you collaborated with senior engineers. Skip multi-team and multi-quarter scope; that comes at Senior.