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An independent executing program with its own dedicated memory space allocated by the OS.

Last updated: April 2025. Compatible with Windows, macOS, Linux, and all e-readers. fundamentals of backend engineering free download upd

Unlike HTTP's request-response model, WebSockets provide full-duplex, persistent communication channels over a single TCP connection, ideal for real-time apps. 2. Web Servers and Reverse Proxies An independent executing program with its own dedicated

You can become a proficient backend engineer in about 6 months with 10-15 hours of study per week. Here is a , built around the free resources in this article. Here is a , built around the free resources in this article

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Instead of a client constantly polling a server for updates, webhooks reverse the flow. The server sends an automated HTTP request to the client as soon as a specific event occurs (e.g., a successful payment notification). 3. Database Management and Architecture

| Core Concept | Why It Matters | Free Hands-On Tool | |--------------|----------------|---------------------| | | Every API, every web app | curl , httpie , Wireshark | | Stateless vs Stateful | Scaling vs complexity | JWT + Redis | | CRUD & REST | 90% of backend work | Postman, FastAPI demo | | Database indexing | Speed vs storage | EXPLAIN in PostgreSQL | | Message queues | Async processing | Redis or RabbitMQ (Docker) | | Caching strategies | Latency reduction | Redis, Memcached | | Authentication | Security baseline | OAuth2, bcrypt demo | | Logging & monitoring | Debugging production | OpenTelemetry, Prometheus |