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@imkarthik03

Nagappan S

@imkarthik03·Chennai, India·Joined September 2026

Building scalable products at the intersection of Full Stack Engineering & AI

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I build scalable web apps, experiment with AI, and turn complex engineering problems into working products.

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Nagappan S's blogs

Nags Dev Communitynagspidey.hashnode.dev3 posts

About

I build scalable web apps, experiment with AI, and turn complex engineering problems into working products.

Available for

Nothing here yet.

Nagappan S's blogs

Nags Dev Communitynagspidey.hashnode.dev3 posts

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Recently published

NSNagappan Sinnagspidey.hashnode.dev·4h ago · 8 min read

Prompt Engineering Beyond the Basics: What Actually Makes a Prompt Work

You've done this before: you write a prompt, test it a few times in a playground, it looks great, and you ship it. Then two weeks later it starts giving weird answers — not wrong exactly, just inconsi

NSNagappan Sinnagspidey.hashnode.dev·1d ago · 8 min read

Vector Databases & Embeddings 101

You've built a search bar. A user types "how do I get my money back," hits enter, and your keyword search comes back empty — even though your docs have an entire page titled "Refund Policy" sitting th

NSNagappan Sinnagspidey.hashnode.dev·2d ago · 9 min read

What is RAG, Really? (Explained for Developers Who Use AI Daily)

Here's something you've probably run into: you ask Claude or ChatGPT a question like "What's in our team's latest project doc?" or "What happened in the news this morning?" — and it either confidently