theskilledcoder's profile picture. Senior Developer

Skilled Coder

@theskilledcoder

Senior Developer

Anyone can build an app now just like anyone can take a photo. But not everyone can capture light. Understanding data structures and architecture is how you learn where to point the camera


Database Scaling Rules 1 table → fine 10 tables → add indexes 100 tables → need query optimization + caching 1000 tables → need sharding, read replicas, schema governance


SQL Complete Roadmap

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You have millions of cache entries (Redis) and want to reduce cache misses when keys are dynamically generated. How do you approach it?

theskilledcoder's tweet image. You have millions of cache entries (Redis) and want to reduce cache misses when keys are dynamically generated.

How do you approach it?

Linked Lists walk - arrays teleport One node knows only the next - nothing more. Used in: - LRU caches (LinkedHashMap) - Undo/Redo stacks - Memory allocators - TCP/IP packet buffers - Concurrent queues - Blockchain history Not fast, but flexible.


How to Handle 10,000 Concurrent Users

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CDN All You Need to Know

theskilledcoder's tweet image. CDN All You Need to Know

Kubernetes - All You Need to Know

theskilledcoder's tweet image. Kubernetes - All You Need to Know

How gRPC Works from Start to End

theskilledcoder's tweet image. How gRPC Works from Start to End

Rate limiting isn’t about rejection , it’s about survival. Used in: - APIs → fair usage - Auth → brute-force prevention - Queues → backpressure control It protects good systems from good users who go wild


Backend System Design: Notification System

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How Amazon Kinesis Works (End to End)

theskilledcoder's tweet image. How Amazon Kinesis Works (End to End)

How Row-Oriented vs Column-Oriented Databases Differ

theskilledcoder's tweet image. How Row-Oriented vs Column-Oriented Databases Differ

RabbitMQ - All You Need to Know

theskilledcoder's tweet image. RabbitMQ - All You Need to Know

Microservice Design Checklist

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System Design Roadmap

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Linux Survival Guide

theskilledcoder's tweet image. Linux Survival Guide

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