System Design AI

Guided practice

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Classic designs 5

Ordered by design number

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ReliabilityClear filters

2. Design a Distributed Rate Limiter
Enforce tenant quotas across servers while making burst behavior and outage policy explicit.
ClassicMedium
Caching Databases Concurrency
+8
Distributed systems API gateways AWS Lua Rate limiting Redis Reliability Token bucket
Worked design
Practice
4. Design a Notification System
Deliver email, push and SMS with preferences, retries and honest delivery status.
ClassicMedium
Queues Streaming Distributed systems
+10
AWS Delivery semantics Fan out Kafka Notifications Real time Reliability Retries Amazon SQS User preferences
Worked design
Practice
10. Design an API Gateway
Route API traffic with authentication, tenant limits and safe configuration rollout.
ClassicMedium
Security API design API gateways
+7
Authentication AWS Control plane Envoy Rate limiting Reliability Routing
Worked design
Practice
101. Design a Webhook Delivery System
Signed HTTPS callbacks for a billion events a day, at least once, retried for three days, with no endpoint able to slow another.
ClassicMedium
Queues Streaming Distributed systems
+8
At least once AWS Infrastructure Kafka Reliability Retries Amazon SQS Webhooks
Worked design
Practice
117. Design a Self-Healing GPU Fleet
Detect, classify and repair failing GPU nodes (Xid errors, ECC, NVLink and EFA faults, stragglers, silent corruption) without draining the fleet.
ClassicMedium
Observability AI infrastructure AWS
+2
GPUs Reliability
Worked design
Practice

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