System Design interview prep vs Don't Break Prod

ArchSim is the ultimate training ground for software engineers preparing for system design interviews. Forget passive reading—ArchSim puts you in the driver’s seat of a high-stakes engineering simulation with a fast, value-first onboarding and a 60‑second drill preview to get you into the action quickly. Key Features: Interactive War Room: Solve real-world architecture scenarios in a dynamic environment. Define requirements, estimate capacity, and design your system component by component. AI Interrogator: Face off against an intelligent Prep AI that challenges your decisions, asks follow-up questions, and probes for weaknesses in your design. Realistic Scenarios: Tackle classic and modern interview questions like “Design a URL Shortener” and “Design a Social Network.” Perfect for your job search. Daily Drills: Short 5–10 minute practice sessions to build fundamentals, track streaks, and sharpen core skills. Detailed Analytics: Track your performance, identify knowledge gaps, and monitor your improvement over time with comprehensive metrics. Debrief & Learn: Get instant feedback on your design choices and learn best practices for scalability, reliability, and maintainability. Whether you are a junior developer or a staff engineer, ArchSim provides the practice you need to ace your next tech interview and land your dream job. ----------- Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Terms of Use: https://calico-magnolia-61e.notion.site/archsim-terms-of-use-2c6 Privacy Policy: https://calico-magnolia-61e.notion.site/archsim-privacy-policy-2c

Don't Break Prod turns system design practice into a daily habit. Every day brings one timed incident: a production system is failing, the clock is running, and you make the calls to bring it back. Diagnose the root cause, mitigate, recover, and harden before the timer hits zero. It is built for engineers preparing for system design and on-call interviews, and for anyone who wants to think more clearly about how real systems break. THE DAILY INCIDENT A new production failure every day, the same one for everyone. A cache that went cold, a queue that will not drain, a cert that expired at midnight, a cache key that leaked one tenant's data into another. Time is short, wrong moves cost you seconds, and your score is the time you have left. One scored run per day. Share your result as a spoiler-free card and compare calls with your team. PRACTICE THAT STICKS Work through core topics at your own pace: caching, load balancing, message queues, databases, sharding, consistency, rate limiting, CDNs, and full design walkthroughs like URL shorteners, chat, and news feeds. Spaced repetition brings back what you are about to forget, right when you need it. THREE WAYS TO ANSWER Multiple choice, fill in the blank, and drag-to-order questions, each written to test whether you understand the tradeoff, not whether you can recognize a term. KEEP YOUR STREAK Show up daily and build a streak of days without breaking prod. Earn failover freezes that quietly cover a missed day. Your whole history lives in Profile as a day-by-day grid: every incident survived, every failover spent, every day the pager won. Compare your all-time score with other players on the Game Center leaderboard. PRIVATE BY DESIGN No account, no sign-up, no tracking, no ads. Everything you do stays on your device. The leaderboard is optional and runs on Apple's Game Center. Every question is original writing. The concepts are standard system design material, explained plainly, so you leave understanding the why, not just the answer.