I've been building microservice architectures for about 4 years, and it's been sort of funny to see them become trendy, and then suffer a backlash. In my view, most of the hype around microservices got the concept totally wrong.

https://www.linkedin.com/posts/rajatgajbhiye_ive-been-building-microservice-architectures-activity-7340226643707228160-vXbd

If you're someone who wants to truly understand system design, architecture choices, and how real software is built, I'm sharing free content on my YouTube channel: https://youtube.com/@rajat_gajbhiye

Give it a Like for better reach 👍🏼

It took me two years to build this guide while working as a software developer. I’ve divided it into three parts:

Fifteen-Day Preparation Strategy – Get prepped with all the necessary concepts in just 15 days.

System Design Concepts – Everything you need to know about system design.

50 Solved Questions – Detailed answers with HLD diagrams, LLD code, and in-depth explanations.

Trust me, this guide focuses on the 20% of topics that are asked in 80% of system design interviews.

Check out the System Design KIT here: https://topmate.io/rajat_gajbhiye/1446625

PS: Use the coupon code SDE10 to get a 10% discount (only for the next few users, so GO CHECK IT OUT FAST!!!)

PayPal Interview Questions for Software Developer in 2025

https://www.linkedin.com/posts/rajatgajbhiye_paypal-interview-questions-for-software-developer-activity-7340384986237173760-HjSP

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Disappear till SEPTEMBER 2025 and..

Clear all System Design Rounds

Here is HOW can you do in 5 steps.

https://www.linkedin.com/posts/rajatgajbhiye_disappear-till-september-2025-and-clear-activity-7340589016402006016-ljOz

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I will never understand GIT it is so confusing 🙃

Git commands I used 99% of the time being a Software Engineer for 2+ years with the working flow:

https://www.linkedin.com/posts/rajatgajbhiye_i-will-never-understand-git-it-is-so-confusing-activity-7340744968765911040-XXBd

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I have researched lots of top MNCs like Amazon, Microsoft, Google, Uber, Tiger Analytics, Databricks, etc., for Data Engineer roles (since it's booming) and found that here are some topics that are asked in every interview, both at the fresher and experienced levels.

https://www.linkedin.com/posts/rajatgajbhiye_dataengineering-amazon-systemdesign-activity-7340951398173323264-830h

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System Design used to scare me.

I remember preparing for my first few interviews — reading random blogs, watching hours of YouTube videos, and still feeling lost when someone asked me about CAP or caching strategies. 😓

That’s when I realized…

System design isn’t about knowing everything. It’s about understanding the right things deeply.

Over time, I figured out that 80% of system design interview questions come from just 20% of concepts.

So, I created this guide:
Focused. Structured. Real-world backed.

Here’s what’s inside👇

✅ 4-Step Roadmap (esp. if your interview is in 15 days)
✅ 15+ core concepts broken down in simple terms
✅ Basics → Advanced (CAP, Queues, Microservices, Caching, DBs, etc.)
✅ 50 System Design Q&A (with diagrams + examples)
✅ Ultimate Cheat Sheet for quick revisions

Use coupon code SD20 for 20% OFF (limited slots only)

Check out the Guide here: https://topmate.io/rajat_gajbhiye/1446625?coupon_code=SD20

Hey fam,
A big THANK YOU to everyone who supported me over the last few days. Your comments, retweets, and messages truly meant a lot.

As a small token of gratitude, I’m sharing a FREE DSA Roadmap for all of you who stood by me.

Check it here: https://www.linkedin.com/posts/rajatgajbhiye_never-bet-against-dsa-trust-me-if-you-do-activity-7343278067865255938-YM22

Let’s keep growing and helping each other :)

Study these 45 problems well and you have prepared for 99% of your System Design Interviews

https://www.linkedin.com/posts/rajatgajbhiye_study-these-45-problems-well-and-you-have-activity-7343514564866494465-rkfD

Most asked System Design Questions, save the post you’ll need it during interviews :)

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Don't aim for this:

Java - 25%
Spring Boot - 25%
Microservices - 25%
System Design - 25%

Aim for this:

Java - 100%
Spring Boot - 25%
Microservices - 25%
System Design - 25%

Master one skill deeply, then build around it!

https://www.linkedin.com/posts/rajatgajbhiye_dont-aim-for-this-java-25-spring-activity-7343648180137267200-gQea

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No HLD, no Job

Save this roadmap — it’ll literally decide your interview outcome.

https://www.linkedin.com/posts/rajatgajbhiye_no-hld-no-job-save-this-roadmap-itll-activity-7343995573085044736-picw

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I screwed up 3 interviews because I couldn't explain my projects properly

Here is how you can explain your project in an interview

https://www.linkedin.com/posts/rajatgajbhiye_i-screwed-up-3-interviews-because-i-couldnt-activity-7344249404091969536-f2vT

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Oracle Interview Experience
Compensation: 30L
Position: Member of Technical Staff
Application Method: Direct Application

https://www.linkedin.com/posts/rajatgajbhiye_oracle-interview-experience-compensation-activity-7344356387285544961-11bX

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Without Leetcode, you cannot pass interviews.

Without side projects, your resume will not stand out.

Should you focus on LeetCode or build another project? To get your first job, you need a mix of both.

But the real problem? Many people don’t know what to build.

I’ve been there too.. motivated to start coding but stuck staring at my screen, Googling "best programming projects" and eventually ending up watching YouTube videos instead.

This cycle continues until you start building.

To break this cycle, here’s a list of projects to boost your portfolio + DSA patterns to crack coding interviews.

𝟭𝟬 𝗖𝗼𝗱𝗶𝗻𝗴 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀 𝘁𝗼 𝗕𝘂𝗶𝗹𝗱 𝗬𝗼𝘂𝗿 𝗥𝗲𝘀𝘂𝗺𝗲

𝟭𝟯 𝗖𝗼𝗱𝗶𝗻𝗴 𝗣𝗮𝘁𝘁𝗲𝗿𝗻𝘀 𝘁𝗼 𝗖𝗿𝗮𝗰𝗸 𝗜𝗻𝘁𝗲𝗿𝘃𝗶𝗲𝘄𝘀

https://www.linkedin.com/posts/rajatgajbhiye_without-leetcode-you-cannot-pass-interviews-activity-7344587170747183105-JncV

Save the post ❤️👍🏼

Design Zomato? Design Netflix?

No, start with these 3 underrated problems.

Everyone jumps to building complicated systems on day one of system design prep.

But no one talks about the real learning in the underrated ones.

Here are 3 simple but most-asked problems to start with:

https://www.linkedin.com/posts/rajatgajbhiye_design-zomato-design-netflix-no-start-activity-7344723718503301121-UNiz

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I wanted to learn Software Engineering, so I watched 100+ videos on YouTube.

80% of them were a complete waste of time.

But this 9-playlist will teach you more skills than a 4-year degree.

https://www.linkedin.com/posts/rajatgajbhiye_i-wanted-to-learn-software-engineering-so-activity-7344945216123994112-h12l

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DSA on SUNDAY

40 most asked DSA questions to clear your next interview

https://www.linkedin.com/posts/rajatgajbhiye_dsa-on-sunday-40-most-asked-dsa-questions-activity-7345081154716217344-HlAG

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Mindtickle Interview Experience
Compensation: 38L
Position: SDE 2

https://www.linkedin.com/posts/rajatgajbhiye_mindtickle-interview-experience-compensation-activity-7345304859039993856-0ppv

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Projects in 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 and 𝗠𝗶𝗰𝗿𝗼𝘀𝗲𝗿𝘃𝗶𝗰𝗲𝘀 that will stand out in an interview.

https://www.linkedin.com/posts/rajatgajbhiye_projects-in-%F0%9D%97%A6%F0%9D%98%86%F0%9D%98%80%F0%9D%98%81%F0%9D%97%B2%F0%9D%97%BA-%F0%9D%97%97%F0%9D%97%B2%F0%9D%98%80%F0%9D%97%B6%F0%9D%97%B4%F0%9D%97%BBand-activity-7345443519559319554-o0mz

Give it a Like for better reach ❤️👍🏼