Observed arrival · 2026-11-15
ScaleMySystems: system design under load
A browser-based simulator for practicing system design by changing architectures and measuring how they handle traffic and failures.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- System-design learners and architecture interview candidates
- Worth noticing
- The worked example holds traffic and seed constant, then compares goals, success, p99 for successful requests, and monthly cost.
Field notes
The scenario is organized as six beats, moving from cache-hit traffic to a flush, database overload, crash, replica change, and rerun. Its comparison reports goals met, success rate, p99 latency for successful requests, and monthly cloud cost. The homepage also describes an MCP route for agents to alter designs and return rerunnable result links, though the extracted page does not verify that workflow.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
⊠LoginAccess appeared gated
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
ƒJavaScriptBrowser-side code central
One card from the complete issue