Ishwar Chandra Tiwari | codewithishwar

@codewithishwar

Bangalore, IndiaJoined March 2026

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CodeWithIshwar - sharing insights on software engineering, DSA, system design, debugging, and practical development lessons. Created by Ishwar Chandra Tiwari.

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Ishwar Chandra Tiwari | codewithishwar's blogs

Most Engineers Debug the Code. Great Engineers Debug the Thinking.codewithishwar.hashnode.dev15 posts

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🧠 Memory: The Most Overlooked Bottleneck in Backend Systems

3d ago · 2 min read · When a system slows down, most developers look at CPU usage or blame inefficient code. But in many real-world cases, the actual issue is memory mismanagement. 🚨 Why Memory Becomes a Problem Memory i

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Redis Isn’t Just a Cache - It’s a Data Structure Engine

6d ago · 1 min read · At first glance, Redis looks like a simple key-value store. But once you go deeper, you realize it’s built on top of multiple optimized data structures: Strings Hashes Lists Sets Sorted Sets Ea

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🚨 Java & JavaScript are NOT Call by Reference (Let’s Fix This Once and For All)

Apr 15 · 3 min read · One of the most common misconceptions I see (even among experienced developers): “Java / JavaScript pass objects by reference” ❌ That’s not true. 👉 Both Java and JavaScript are strictly Call by Val

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Limitations of System Design (with Real-World Examples)

Apr 13 · 2 min read · When we learn system design, we often see clean diagrams, scalable architectures, and “perfect” solutions. But in reality, system design is not about perfection. It’s about trade-offs. Let’s break dow

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When Do You Actually Need to Scale? (Real Signals Engineers Miss)

Apr 8 · 2 min read · Scaling is one of the most talked-about topics in system design. But here’s the uncomfortable truth: Most systems don’t need scaling. They need better design. 🚨 The Problem: Premature Scaling I’ve s

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Ishwar Chandra Tiwari | codewithishwar

About

Available for

Ishwar Chandra Tiwari | codewithishwar's blogs

Recently published

🧠 Memory: The Most Overlooked Bottleneck in Backend Systems

Redis Isn’t Just a Cache - It’s a Data Structure Engine

🚨 Java & JavaScript are NOT Call by Reference (Let’s Fix This Once and For All)

Limitations of System Design (with Real-World Examples)

When Do You Actually Need to Scale? (Real Signals Engineers Miss)

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Ishwar Chandra Tiwari | codewithishwar

About

Available for

Ishwar Chandra Tiwari | codewithishwar's blogs

Recently published

🧠 Memory: The Most Overlooked Bottleneck in Backend Systems

Redis Isn’t Just a Cache - It’s a Data Structure Engine

🚨 Java & JavaScript are NOT Call by Reference (Let’s Fix This Once and For All)

Limitations of System Design (with Real-World Examples)

When Do You Actually Need to Scale? (Real Signals Engineers Miss)