First time: I froze, lost 21LPA offer
Second time: I smiled, got 26LPA offer

https://www.linkedin.com/posts/rajatgajbhiye_first-time-i-froze-lost-21lpa-offer-second-activity-7405473379920736256-SoqB

Do read ❤️👍🏼

First time: I froze, lost 21LPA offer
Second time: I smiled, got 26LPA offer

In one interview, I was asked:
- Why does WhatsApp instantly show ‘typing…’ even if your friend is on the other side of the world?

I froze. I didn’t know the answer. And yes, I got rejected. But instead of moving on, I went deeper into the questions and learned.

In another interview, two weeks later, I faced the same question. I smiled and explained:
- As soon as a user presses a key, WhatsApp sends a tiny “typing” signal (not the text).
- That signal travels over a WebSocket to the nearest WhatsApp server.
- Using Redis Pub/Sub, the event is broadcast to the server where the other person’s connection is active.
- That server pushes the event instantly, so within ~200ms, the “typing…” status appears.

These events(packets) are extremely lightweight, which is why even on 2G networks, WhatsApp still feels real-time.

𝗞𝗲𝗲𝗽𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗶𝗻 𝗺𝗶𝗻𝗱, 𝗜’𝘃𝗲 𝗽𝗿𝗲𝗽𝗮𝗿𝗲𝗱 𝗶𝗻 𝗗𝗲𝗽𝘁𝗵 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗚𝘂𝗶𝗱𝗲, 𝟰𝟬𝟬𝟬+ 𝗽𝗲𝗼𝗽𝗹𝗲 𝗮𝗿𝗲 𝗮𝗹𝗿𝗲𝗮𝗱𝘆 𝘂𝘀𝗶𝗻𝗴 𝗶𝘁. 𝗢𝗳𝗳𝗲𝗿𝗶𝗻𝗴 𝟰𝟬% 𝗼𝗳𝗳 𝗳𝗼𝗿 𝗮 𝗹𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗺𝗲!

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗚𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲: https://topmate.io/rajat_gajbhiye/1446625
Use code 𝗦𝗗𝗘𝟰𝟬.

1. Don’t beg for a referral. Instead, find the job link, write two short lines explaining why you’re a good fit, and ask if they’d be open to referring you.

2. You don’t need to tick 100% of the JD. 60–70% is enough to apply. If only 60 to 70 percent of the skill matches, apply.

https://www.linkedin.com/posts/rajatgajbhiye_1-dont-beg-for-a-referral-instead-find-activity-7405969887640145920-NKwO

Do read and repost for others ❤️👍🏼

27 LPA at Walmart

These were the EXACT questions asked in 2025.

https://www.linkedin.com/posts/rajatgajbhiye_27-lpa-at-walmart-these-were-the-exact-questions-activity-7406687319853891585-MHu5

Do read ❤️👍🏼

I was at 6LPA six months ago.

This is how I reached 26LPA.

https://www.linkedin.com/posts/rajatgajbhiye_i-was-at-6lpa-six-months-ago-this-is-how-activity-7406918961084149761-ztPJ

Do read ❤️👍🏼

I am happy to share that 5000+ people have started using my interview preparation guide for software engineers.

I have received hundreds of positive feedbacks for the material which u can see on my topmate page.

Trust me, it covers everything you need to crack any software dev role.

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗚𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲: https://topmate.io/rajat_gajbhiye/1446625
Use code 𝗦𝗗𝗘𝟰𝟬.

Stay Hungry, Stay FoolisH!

In the last month,

I cracked 3 offers 20L, 22L, and 26LPA.

I was happy. But days later… I wasn’t comfortable, so I started applying again.

Over the last three months, I have applied to over 180 companies. Got rejected. Got ghosted. But also cracked 5 offers.

Things that worked for me:

https://www.linkedin.com/posts/rajatgajbhiye_in-the-last-month-i-cracked-3-offers-20l-activity-7407051166141865984-pVX_

Do read ❤️👍🏼

The most dangerous salary in the world is ₹5 LPA. It is enough to survive. It is enough to pay rent. So you stop running. You stop learning. You settle.

You stop learning after office hours.
You stop opening LeetCode.
You stop thinking about system design.

And one day you wake up with:
- 4–5 years of experience
- Same tech stack
- Same salary band

Not because you’re bad. For SDEs, growth never comes from comfort.

It comes from intentional discomfort:
- Studying after work
- Building real projects
- Practicing DSA & system design
Don’t wait for a layoff to wake you up.

𝗞𝗲𝗲𝗽𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗶𝗻 𝗺𝗶𝗻𝗱, 𝗜’𝘃𝗲 𝗽𝗿𝗲𝗽𝗮𝗿𝗲𝗱 𝗶𝗻 𝗗𝗲𝗽𝘁𝗵 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗚𝘂𝗶𝗱𝗲.

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗚𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲: https://topmate.io/rajat_gajbhiye/1446625
Use code 𝗦𝗗𝗘𝟰𝟬 to get 40% off ❤️

Microsoft pays around 30-45LPA for SDE-1 and 50-65LPA for SDE-2

This is the classic question they generally ask

https://www.linkedin.com/posts/rajatgajbhiye_microsoft-pays-around-30-45lpa-for-sde-1-activity-7407409820577812481-pyKo

Do read ❤️👍🏼

I interviewed at Oracle → got 20 LPA offer
I interviewed at Deloitte → got 23 LPA offer
I interviewed at Walmart → Lost 28 LPA offer

After giving multiple interviews, one thing became clear: If you want to clear any Software Engineer interviews, the formula is simple: System Design and DSA

Here are the 16 most asked questions on these topics:

https://www.linkedin.com/posts/rajatgajbhiye_i-interviewed-at-oracle-got-20-lpa-offer-activity-7407777394876469248-3VFG

Do read ❤️👍🏼

I have researched lots of product-based companies like Amazon, Microsoft, Netflix, Zomato, Goldman Sachs, Paytm, J.P. Morgan, etc., for SDE-1 and 2 roles, and found 20 system design questions are almost asked in every interview, both at the fresher and experienced levels.

https://www.linkedin.com/posts/rajatgajbhiye_i-have-researched-lots-of-product-based-companies-activity-7408002344329728000-9Yud

Do read ❤️👍🏼

I interviewed at Oracle → got 20 LPA offer
I interviewed at Deloitte → got 23 LPA offer
I interviewed at Walmart → Lost 28 LPA offer

After giving multiple interviews, one thing became clear: If you want to clear any Software Engineer interviews, the formula is simple: System Design and DSA

Here are the 16 most asked questions on these topics:

𝗗𝗦𝗔
1. Implement LRU/LFU Cache.
2. Find Median from Data Stream.
3. Word Ladder problem (shortest transformation).
4. Merge K Sorted Lists.
5. Detect Cycle in a Directed Graph.
6. Maximum Subarray Sum (Kadane + variations).
7. Kth Largest Element in a Stream.
8. Design a Scheduler with Task Priorities.
9. DSA Roadmap: https://lnkd.in/dvvVJ5zn

𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻
9. Design a scalable Chat Application (WhatsApp/Slack).
10. Design a URL Shortener.
11. Design a distributed Notification System.
12. How would you scale a Video Streaming platform?
13. Design a Payment System (like Razorpay/Stripe).
14. How do you design an API Rate Limiter?
15. Design an E-commerce Checkout System.
16. Design a Ride-Hailing app (Uber/Ola).

𝗞𝗲𝗲𝗽𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗶𝗻 𝗺𝗶𝗻𝗱, 𝗜’𝘃𝗲 𝗽𝗿𝗲𝗽𝗮𝗿𝗲𝗱 𝗶𝗻 𝗗𝗲𝗽𝘁𝗵 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗚𝘂𝗶𝗱𝗲.

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗚𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲: https://topmate.io/rajat_gajbhiye/1446625
Use code 𝗦𝗗𝗘𝟰𝟬. 𝗢𝗳𝗳𝗲𝗿𝗶𝗻𝗴 𝟰𝟬% 𝗼𝗳𝗳 𝗳𝗼𝗿 𝗮 𝗹𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗺𝗲!

Spring Boot Roadmap

https://www.linkedin.com/posts/rajatgajbhiye_spring-boot-roadmap-phase-1-basics-activity-7408384197985206272-MVPw

Do read 👍🏼❤️

Got rejected in 8 straight interviews

But by the 17th, I had 5 offers in hand

https://www.linkedin.com/posts/rajatgajbhiye_got-rejected-in-8-straight-interviews-but-activity-7408507389928218624-q_Iw

Do read ❤️👍🏼

5 Rounds. 38 LPA. The Goldman Sachs Interview Breakdown
Role: Java Backend Developer
Application Mode: Direct Application

https://www.linkedin.com/posts/rajatgajbhiye_5-rounds-38-lpa-the-goldman-sachs-interview-activity-7408745415329898496-gCrY

Do read ❤️

22 LPA at Deloitte

These were the EXACT questions asked in 2025

https://www.linkedin.com/posts/rajatgajbhiye_22-lpa-at-deloitte-these-were-the-exact-activity-7408871658817773568-dIkR

Do read 👍🏼❤️

First offer: 20 LPA Second offer: 22 LPA Final accepted: 26 LPA

40 days. 90 days' notice. Multiple offers give you negotiation power.

What worked for me: https://www.linkedin.com/posts/rajatgajbhiye_first-offer-20-lpasecond-offer-22-lpa-activity-7409224518994493441-QVTf

Do read ❤️👍🏼

First offer: 20 LPA Second offer: 22 LPA Final accepted: 26 LPA

40 days. 90 days' notice. Multiple offers give you negotiation power.

What worked for me:
 - Set your notice period to 15 days or less.
 - Don't resign blindly. Start giving interviews for every call you get.
 - Resign only when you’re confident you can crack interviews. (Because with 90 days, most of the time, except for some companies, consider you resign in uncertainty)
 - Tell HR your project is ending in 15-20 days, so you can exit early.
 - Crack multiple offers. 90 days is not always fixed. Use buyout options or earned leave to reduce it.
 - Use personal reason (family/relocation).
 - Offer smooth handover, documentation, and KT.
 - Negotiate smartly: use offer as leverage, explore buyout, and ask your new employer can reimburse. (MNCs often do.)
 - Never settled for the first “yes.”

And here’s the real truth: most rejections don’t happen in DSA; they happen in System Design rounds.

𝗞𝗲𝗲𝗽𝗶𝗻𝗴 𝘁𝗵𝗶𝘀 𝗶𝗻 𝗺𝗶𝗻𝗱, 𝗜’𝘃𝗲 𝗽𝗿𝗲𝗽𝗮𝗿𝗲𝗱 𝗶𝗻 𝗗𝗲𝗽𝘁𝗵 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗚𝘂𝗶𝗱𝗲, 𝟰𝟬𝟬𝟬+ 𝗽𝗲𝗼𝗽𝗹𝗲 𝗮𝗿𝗲 𝗮𝗹𝗿𝗲𝗮𝗱𝘆 𝘂𝘀𝗶𝗻𝗴 𝗶𝘁. 𝗢𝗳𝗳𝗲𝗿𝗶𝗻𝗴 𝟰𝟬% 𝗼𝗳𝗳 𝗳𝗼𝗿 𝗮 𝗹𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗺𝗲!

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗚𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲: https://lnkd.in/dte69Z5N
Use code 𝗦𝗗𝗘𝟰𝟬.

Stay Hungry, Stay FoolisH!