system-design-academy — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited system-design-academy (Agent Skill) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Case studies from 40+ companies + 114 system design concepts.
| Company | Topics |
|---|---|
| Amazon / AWS | S3 architecture, Prime Video microservices, scaling |
| Netflix | Microservices, chaos engineering |
| Uber | ETA computation, nearby drivers, payments |
| Messaging at billions scale | |
| Slack | Messaging architecture |
| Stripe | Rate limiting, idempotent APIs |
| Infrastructure scaling to billions | |
| YouTube | Scalability, Vitess MySQL |
| Search engine, Docs real-time editing | |
| Discord | Performance optimization, messaging |
| Figma | PostgreSQL scaling |
| Shopify | Flash sales handling |
| Zoom | Video conferencing |
| Live video streaming | |
| Tinder | Swipe architecture |
| Scalability patterns | |
| Architecture | |
| Dropbox | File sync and growth |
| Canva | Real-time collaboration |
| Stripe / Razorpay / PayPal | Payment gateways |
| Zapier | Automation platform |
| Bluesky | Decentralized social network |
| Disney+ Hotstar | 25M concurrent users, emoji delivery |
| Concept | Key Points |
|---|---|
| API Gateway | Auth, routing, rate limiting, aggregation |
| Caching | Write-through, write-behind, cache-aside, eviction |
| Consistent Hashing | Virtual nodes, minimal rehashing on scale |
| Load Balancing | Round-robin, least-connections, IP-hash |
| Rate Limiting | Token bucket, sliding window, fixed window |
| Message Queues | Kafka, RabbitMQ, pub/sub patterns |
| DB Scaling | Sharding, replication, SQL vs NoSQL trade-offs |
| CDN | Edge caching, origin pull vs push |
| Bloom Filters | Probabilistic membership, space efficient |
| Gossip Protocol | Distributed state propagation |
| Cell Architecture | Blast radius isolation |
| Chaos Engineering | Netflix Simian Army approach |
| Actor Model | Concurrent, message-passing systems |
| Real-time | WebSocket vs SSE vs long-polling |
~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.