Coding prep
Interview study sheets and Python practice. Built to read on a phone.
Practice
Warm up /warmup 43 short Python problems for the ten minutes before an interview. Write code, run the tests in your browser, get hints. Filter by company. Practice /practice 50 in-depth problems for a week of preparation — the ones that actually recur across 37 company-tagged question lists. Three levels of hint and a worked solution each.Study sheets
Roblox — Senior SWE, Safety Foundation /roblox 45-minute coding round. Seven ranked problem bets from company-tagged frequency data, worked solutions, and a Python cheat sheet. Cloudflare — Systems Engineer, Hyperdrive /cloudflare 45-minute hiring manager round. How Hyperdrive actually works, the questions he'll ask, plus the coding and system design rounds that follow. Shopify — 30-minute conversation /shopify Recent work, impact, and how you use AI. Shopify's AI-first position in detail, how to answer the AI question, and the full technical loop. Snowflake — Engineering /snowflake Recruiter call, and the loop it leads to. Topological sort dominates their coding rounds; concurrency and database internals dominate the rest. Cameo — Automation Engineer /cameo 20 minutes with the Chief of Staff / VP People. What that pairing means, the role from the actual posting, and the integration-engineering rounds after.Each sheet ranks what's most likely to be asked using company-tagged LeetCode frequency data, published interview guides and first-hand candidate reports, then weights it by what the specific team actually builds. Every code snippet — in the sheets and in the practice problems — is executed against known inputs before publishing.