system-design
- Redis Persistence Wars: RDB, AOF, and Hybrid
Master Redis persistence: RDB, AOF, and Hybrid. Learn fork() copy-on-write, AOF rewrite mechanics, fsync policies, and prevent data loss.
redispersistencebackenddata-losssystem-design - Rate Limiting That Actually Works
Stop outages and protect your APIs. Learn the critical differences between token bucket and sliding window algorithms, and how to build a distributed…
rate-limitingsystem-designredisgoapi-gateway - Scaling Real-Time Chat to 10M Concurrent Users
Learn to design a real-time chat system for millions of users. Master WebSocket scaling, pub/sub architecture, message ordering, and presence detection.
system-designreal-timechatwebsocketskafka - Notification Systems: Fan-Out & Rock-Solid Delivery
Master notification system design: choose fan-out, guarantee delivery, throttle channels, and prevent critical alert failures at scale.
system-designnotificationsmicroservicesqueuesscalability - The Agent Loop: Tool Use, ReAct, and Memory from Scratch
Learn how to build a production-ready AI agent from first principles: master function calling, ReAct loops, and memory design in Python, avoiding common…
ai-agentsllm-opspythonbackendsystem-design - Idempotency: The Unsung Hero of Resilient Systems
Discover why idempotency is non-negotiable for distributed systems. Learn to prevent duplicate operations, build resilient APIs, and safeguard critical…
system-designapi-designdistributed-systemsresilienceidempotency - Designing a Notification System: Fan-Out and Delivery Guarantees
Patterns and guarantees for building notification systems that scale: fan-out strategies, retries, idempotency, and delivery guarantees.
notificationssystem-design