DEV Community: Harsh Vardhan Dubey

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Harsh Vardhan Dubey — Tue, 04 Aug 2026 18:40:16 +0000

Harsh Vardhan Dubey

Aug 4

"I didn't search for it. I didn't type it. I only talked about it."

#ai #machinelearning #datascience #programming

2 min read

"I didn't search for it. I didn't type it. I only talked about it."

Harsh Vardhan Dubey — Tue, 04 Aug 2026 18:39:01 +0000

Have you ever had this happen?
You're chatting with a friend about buying a new pair of shoes.

A few hours later...
Instagram shows you an ad for those exact shoes. Or maybe you're talking about planning a trip.
Suddenly...Your feed is filled with hotel deals, flight offers, and travel videos.

The first thought that comes to almost everyone's mind is:
"𝐌𝐲 𝐩𝐡𝐨𝐧𝐞 𝐢𝐬 𝐥𝐢𝐬𝐭𝐞𝐧𝐢𝐧𝐠 𝐭𝐨 𝐦𝐞." 👀

Honestly...

I've thought the same. And maybe you have too.
But what if I told you that the truth is actually more fascinating than the myth?

So... is your phone secretly listening?

Probably not. Not because it can't.

But because it usually doesn't need to.

Think about it.
Every day you leave behind hundreds of tiny digital clues.

🔍 What you search.
❤️ What you like.
⏱️ How long you watch a video.
🛒 What you browse.
📍 Where you go.
👥 Even who you interact with online.

Individually...They don't say much.
Together...They tell a story that's surprisingly accurate.
A story about your habits.

The scary part?

AI doesn't need to hear your conversations.
Sometimes...It already knows what you're likely to do next. Not because it can read your mind. But because it's incredibly good at recognizing patterns. And when a prediction is accurate enough... It starts to feel like magic. Or surveillance.

Here's what fascinates me the most.
The real superpower of modern AI isn't listening. It's predicting.
And sometimes...Those predictions are so good that they make us question reality itself. The next time you think,

"My phone is definitely listening to me."

Ask yourself a different question.

"How much of my digital behavior have I already shared without realizing it?"

Because maybe...The microphone isn't the real story.
Your patterns are.

💬 Have you ever had an experience that made you think your phone was listening to you? What happened?

Takeaway : Technology doesn't always become powerful by knowing more.
Sometimes... It becomes powerful by predicting better.

Technology becomes less magical when you understand it—and even more fascinating.

— Harsh

☕ How Did Zomato Know I Was Awake? The Science Behind a Simple Notification

Harsh Vardhan Dubey — Thu, 30 Jul 2026 07:52:33 +0000

💡 What started as a funny notification turned into an interesting lesson about AI, personalization, and human behavior.

This morning, at exactly 9:08 AM, my phone buzzed. 📱
I glanced at the screen and saw a notification from Zomato.

"You're up, right? 🤭
Right???? We can get coffee if not." ☕

For a second, I laughed.
Then a thought crossed my mind: "Wait... I literally woke up a few minutes ago. How did it know?" 🤔

It almost felt as if the app had been watching me.
But the more I thought about it, the more fascinating the answer became.

🤔 It doesn't know you're awake.
And that's exactly what makes modern technology so interesting.

Zomato isn't checking whether your eyes are open. It isn't secretly listening to your conversations. It isn't reading your mind.

Instead, it's doing something much simpler—and much smarter.
It's predicting. 🎯

We humans are creatures of habit.

Think about your own routine,
Maybe you wake up around the same time every morning.
You check your phone.
📱 Scroll Instagram.
💬 Reply to a few messages.
☕ And perhaps, on some mornings, you order coffee.
To us, these actions feel random.

To an AI system, they're patterns.
Patterns that repeat every day. And patterns are exactly what machine learning models are designed to learn..

Every interaction teaches the system something.

Every time you:
📱 Open the app
🔕 Ignore a notification
🍳 Order breakfast
🍔 Browse restaurants
☕ Search for coffee
...you're creating tiny pieces of behavioral data.

One action means almost nothing. Thousands of actions over weeks or months begin to tell a story. Not about who you are But about how you behave.

The goal isn't accuracy. It's probability.
The system isn't saying, "The user is definitely awake!!"
It's saying, "Based on everything we've observed, there's a high chance he'll be active around this time."

That single difference changes everything. Modern AI rarely deals in certainty. It deals in probabilities. And surprisingly, probabilities are often enough to create experiences that feel almost magical. ✨

The notification wasn't the product. The prediction was.
Most people think Zomato's product is food delivery. But underneath the interface lies something much deeper:

🤖 A recommendation engine
🎯 A personalization system
📚 Years of data
🧪 Countless experiments
🧠 Machine learning models
👥 Behavioral psychology

The notification is simply the final sentence of a much larger story.

The beautiful part about AI

What impressed me wasn't the notification itself.
It was the realization that technology doesn't always need to understand us perfectly.

Sometimes...It only needs to understand our patterns. And when prediction becomes good enough, It starts feeling like intuition.

That's the moment technology becomes memorable. ✨

So.. the next time an app sends you a notification at the "perfect" moment...

Don't just ask, "How did they know?" 🤨
Ask, "What patterns did I unknowingly teach the system?" 💭

Because in the age of AI, our habits often become the model's biggest teacher.

💬 What are your thoughts? Have you ever received a notification that felt almost too perfectly timed? I'd love to hear your experience.

This article explains the general concepts behind recommendation systems and behavioral prediction. It does not describe Zomato's internal algorithms, which are not publicly known.

Why I Stopped Waiting and Started Building in Public

Harsh Vardhan Dubey — Tue, 28 Jul 2026 19:20:54 +0000

👋 Hello DEV!

I wasn't looking for another social platform.

I was looking for a place where developers don't pretend to know everything.

A place where it's okay to ask questions, make mistakes, and celebrate small wins.

That's how I found DEV Community.

For months, I kept my projects on my laptop.

I thought...

"Maybe I'll start sharing when my code is better."

"Maybe after I build something impressive."

"Maybe after one more course..."

But "maybe" slowly turned into months of silence.

So today, I'm changing that.

Hi, I'm Harsh Vardhan Dubey 👋

I'm currently pursuing my BS in Data Science and Applications at IIT Madras.

Alongside my studies, I'm training in Web Development at SoftPro India, and I also teach programming to school students.

I'm not here because I have all the answers.

I'm here because I believe that learning becomes more meaningful when it's shared.

From today, this profile will be my developer journal.

I'll share:

🚀 Projects I build
🐛 Bugs that teach me something
💡 Things I learn
📚 Simple explanations that might help someone else

Maybe my code won't always be perfect.

Maybe my articles won't always be perfect.

But they'll always be real.

If you're also building, learning, or simply trying to become a little better every day...

I'd love to connect.

Here's to learning in public.

Let's Connect 👋

If you're on a similar learning journey, I'd love to connect.

💻 GitHub: https://github.com/dvharsh31
💼 LinkedIn: www.linkedin.com/in/dvharsh
📷 Instagram: https://www.instagram.com/codewthharsh
🎥 YouTube: https://www.youtube.com/@codewthharsh

Thanks for reading!

See you in the next post. 🚀

— Harsh