Think in paths
Trace how requests travel through clients, gateways, services, stores, queues, and workers.
Architecture practice for visual thinkers
Design systems that feel clear before they feel big.
Arcadia helps you map architecture, simulate request paths, and revisit your decisions with a calmer, more visual workflow.
2 modes
guided problems and studio
Replay
request flow simulation
Saved
diagrams and attempts
Sample flow
Checkout request flow
Client
Mobile + web
Gateway
Auth routing
API
Core reads
DB
Durable writes
Queue
Async fan-out
Workers
Index + notify
Protocol
HTTP -> event
Latency
148 ms path
Signal
Queue fan-out
Practice with guided prompts
Start from real system design scenarios and keep every attempt attached to the problem.
Explore problems
Create your own architecture
Use Architecture Studio for freeform diagrams, experiments, and personal system sketches.
Open Studio
Why it feels different
Less clutter, more architecture signal.
Instead of treating system design like a static sketch, Arcadia keeps the structure, flow, and reasoning close together.
request pathsbottlenecksasync flowssecurity controlsreview notes
Spot weak points
Make bottlenecks, missing controls, and async gaps visible before the design gets messy.
Explain with confidence
Turn rough ideas into diagrams that are easier to present, review, and refine.
Ready when you want to build