Joined December 2025
- Tweets 65
- Following 12
- Followers 7
- Likes 64
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30 Dec 2025
Hi 👋 I’m Ishwar.
12 years in software engineering.
I share DSA, system design, and real-world coding insights.
Building CodeWithIshwar 🚀
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🚀 Mastering SOLID Principles #3
Open/Closed Principle (OCP): Extending Software Without Breaking It
Learn how to design software that grows through extension rather than constant modification.
📖 linkedin.com/pulse/mastering…
#SOLID #CleanCode #SoftwareEngineering #CodeWithIshwar
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After 12 years in software engineering, here's what matters most:
❌ Chasing every new framework
✅ Strong fundamentals
✅ Consistency
✅ Communication
✅ Public learning
✅ Adaptability
Tech changes.
Learning how to learn doesn't.
Comment Your Thought ? 👇
#CodeWithIshwar
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🤖 AI is probably in a hype bubble.
💡 AI is probably also a technological revolution.
Both can be true at the same time.
Many AI companies may disappear.
AI itself isn't going anywhere.
What do you think?
#AI #Tech #Innovation #LLM #CodeWithIshwar #SoftwareEngineering
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One Class.
One Responsibility.
One Reason to Change.
That's the essence of the Single Responsibility Principle (SRP).
📚 Week 1 of my SOLID Principles series is now live:
linkedin.com/pulse/solid-pri…
#SOLID #CleanCode #SoftwareEngineering
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Simple code > Clever code.
The best engineers don't make things complicated.
They make complex things simple.
#CodeWithIshwar #SoftwareEngineering #CleanCode #Programming #DeveloperLife 🚀
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Most microservices should be monoliths.
Most teams don't need distributed systems.
They need simpler systems.
Agree or disagree?
#SoftwareEngineering #SystemDesign
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Software engineering and software interviews test different skills.The best engineers master both.#CodeWithIshwar #SoftwareEngineering #InterviewPrep
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The best code:
Doesn't exist.
No bugs.
No maintenance.
No documentation.
No complexity.
Sometimes the most valuable commit is:
"Removed 2,000 lines of code."
#CodeWithIshwar #SoftwareEngineering 🚀
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This week's learning:
The internet has no shortage of tutorials.
The shortage is people willing to struggle through building something from scratch.
Agree or disagree?
#FridayLearning #CodeWithIshwar #BuildInPublic #Programming #SoftwareEngineering 🚀
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SOLID Principles make code scalable, maintainable, and easier to debug.
#codewithishwar #SOLID #CleanCode #SoftwareEngineering #Programming #Java #Backend #SystemDesign #Coding #Developers #TechTwitter #100DaysOfCode #Architecture #FullStackDeveloper
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Node.js is single-threaded, but concurrency issues still happen.
Race conditions and overlapping async operations are real challenges in scalable systems.
That’s why mutexes, transactions, and Redis locks still matter 🚀
#NodeJS #JavaScript #BackendDevelopment #codewithishwar
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Git won the popularity war.
But Mercurial powered massive engineering workflows at Meta Platforms and Mozilla.
🚀 New newsletter:
“Why Mercurial Still Matters in 2026”
linkedin.com/pulse/complete-…
#Mercurial #Git #SoftwareEngineering #CodeWithIshwar
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JavaScript is single-threaded.
So why do race conditions still exist? 👀
Because async JavaScript is all about execution order.
Event Loop → Promises → Microtasks → Race Conditions.
That’s the real game.
#CodeWithIshwar #javascript #nodejs #reactjs
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Most devs don’t struggle with JavaScript.
They struggle because they ignore what’s under the hood.
JS =
• Closures (memory)
• Event Loop (async)
• Prototypes (inheritance)
• Coercion (weird but powerful)
#JavaScript #WebDev #Programming #CodeWithIshwar
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A simple integer broke my program.
Two threads:
1 and -1
Expected: 0
Actual: ❌ random
Because value is NOT atomic.
It’s:
Read → Modify → Write
Threads can interleave at any step → race condition.
#Concurrency #Multithreading #CodeWithIshwar
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Redis looks simple — just key-value storage.
But underneath, it’s powered by smart data structures: Strings, Hashes, Lists, Sets, Sorted Sets.
That’s why Redis isn’t just fast — it’s a data structure engine for real-time systems 🚀
#Redis #DSA #SystemDesign #CodeWithIshwar
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There is NO perfect system design.
Netflix scaled → changed architecture
Amazon trades consistency for availability
Uber keeps redesigning systems
Reality:
👉 Every system is a trade-off
#SystemDesign #Backend #Scalability #codewithishwar
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Most developers use indexes. Very few truly understand how they work linkedin.com/pulse/most-deve…
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🌐 Type a URL → DNS kicks in 🌐
Cache → Resolver → Root → TLD → IP
⚡ Cache = fast
🐢 No cache = slow
#dns #systemdesign #systemdesign #dns #backend #programming #codewithishwar
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Scaling too early is a mistake.
You don’t scale your system—you scale your problems.
#SystemDesign #Scalability #BackendEngineering #SoftwareEngineering #CodeWithIshwar
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