How to Design a Distributed Messaging Queue
The commit log, partitions, replication, consumer groups, and exactly-once delivery behind Kafka, RabbitMQ, and SQS
Better Engineers
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Clean Code - Stop Writing Comments. Write Better Code Instead.
Before Start lets check you System Design knowledge
How WhatsApp Handled 1 Billion Users with 50 Engineers
The Erlang actor model, FreeBSD networking, and the protocol decisions behind the world’s most efficient messaging system
Why Your Code Is Slow to Read — and How to Fix It in One Hour
I once spent 45 minutes reading a function before I understood what it did.
Stripe System Design
Idempotency, double-entry ledger, SAGA pattern, reconciliation, and the architecture behind every fintech system
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The system behind every cron job at scale — leader election, exactly-once execution, partitioning, and failure recovery
How to Design a URL Shortener at Scale
The consistent hashing, Base62 encoding, Bloom filters, and analytics pipeline behind Bitly and TinyURL
How to Design a Ticket Ordering System at Scale
Redis atomic locks, Kafka rate limiting, WebSocket delivery, and a loyalty card system — the complete interview answer
9 Best Practices for Developing Microservices
The complete engineering guide — from database isolation to orchestration, with real code, anti-patterns, and production lessons
How Instagram Scaled from 0 to 1 Billion Users with 3 Engineers
The PostgreSQL sharding, CDN, caching, and 64-bit ID decisions that made it possible
Securing Your Microservices: The Complete Engineer’s Guide
OAuth 2.0, JWT, Rate Limiting, API Gateways, and HTTPS — everything you need to lock down your services
How Stripe Achieves 99.999% Uptime
Idempotency, distributed locks, and the payment infrastructure behind $1 trillion in transactions
How Discord Stores Trillions of Messages
MongoDB → Cassandra → ScyllaDB → Rust: The database migration story every engineer needs to read
How Uber Migrated from a Monolith to 2,200 Microservices
A decade of architectural decisions, database rewrites, and hard-won lessons — the full teardown
How We Monitor Spring Boot Applications in AKS: From Logs to Alerts and Distributed Tracing
Observability & Logging Architecture on AKS — Metrics, Logs, Traces, Alerts, and Dashboards
How to Design a Notification System: Frontend + Backend
The complete engineering guide — from a bell icon click to a push arriving on 50 million devices
Dead Letter Queue (DLQ) Explained With Real Examples
The one system design pattern that separates engineers who sleep at night from those who don’t
10 Architecture Types You Should Know as a Backend Engineer
10 Popular Architecture Styles, explained with real trade-offs, real examples, and honest opinions.
The Complete Java Backend Developer Roadmap
12 phases · From writing your first class to shipping cloud-native systems
How Netflix Serves ML Predictions to 250M Users at 1 Million Requests Per Second
A deep dive into Switchboard — the custom routing layer Netflix built when AWS API Gateway wasn’t enough