Skilled Coder @theskilledcoder
Senior Developer newsletter.theskilledcoder.com Coding Newsletter Joined November 2022-
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Core Components of a Modern Backend System
Most Confused Basics to Software Devs - Git → Version control system. GitHub → Remote hosting + collaboration - SQL → Query language. MySQL/Postgres → Databases that use SQL. - Library → Reusable collection of functions/classes Framework → Full structure controlling flow…
Caching Strategies 👇 - Same query repeated → Query cache - Expensive computation → Result cache - Static content → CDN - Frequently accessed objects → Redis/Memcached - Personalized data → Session cache - Whole pages → Full-page cache - Service-to-service →…
Sorting 10M integers C++: ~150 ms (std::sort) Rust: ~160 ms (slice::sort_unstable) Go: ~300 ms (sort.Ints) Java: ~350 ms (Arrays.sort) Python: ~1.5 s (Timsort via list.sort()) JS: ~2 s (Array.sort)
WebSockets shine at real-time, bidirectional communication between client and server. They’re great for low-latency apps like chat, gaming, stock tickers, or collaborative editing. How Websocket works start to end
Different Ways to Partition Data
Rules of thumb - Use queues if you expect spikes - Use feature flags if you deploy often - Use caching only if reads >> writes - Scale up (bigger box) before you scale out (more boxes) - Choose strong consistency only if correctness > speed - Use rate limiting if abuse is…
How to Scale Real-Time Analytics to 1M Events per Second
AWS in One-Liners - If you want virtual servers 👉 learn EC2 - If you want serverless 👉 learn Lambda - If you want managed containers 👉 learn ECS & EKS - If you want object storage 👉 learn S3 - If you want databases 👉 learn RDS & DynamoDB - If you want caching 👉 learn…
Java Memory Model (JMM) - All You Need to Know
Must Know Backend Concepts and Differences
API Design Excellence Principles
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