Just add a login button.
How hard can it be?
You take a username and password, check in the DB, and log them in.
Until real users start logging in from multiple devices… and your system falls apart under “simple” expectations.

Here’s why 👇

https://www.linkedin.com/posts/rajatgajbhiye_just-add-a-login-button-how-hard-can-it-activity-7386754875872919553-C9JW

Do read ❤️👍🏼

Before accepting a job offer:

(Do this to avoid working in a toxic workplace)

1. Click 'Search' on LinkedIn.
2. Find the company you interviewed at.
3. Press the 'people' button and filter it down.
4. Filter by 'location', and 'what they do' specifically.
5. Now, look for people who left the company recently.
6. To do so, click "all filters" and select 'past employees.'

Send them this message:

https://www.linkedin.com/posts/rajatgajbhiye_before-accepting-a-job-offer-do-this-to-activity-7387120221259546624-wDxk

Do read ❤️👍🏼

These 9 System Design patterns cover 90% of the interviews you’ll ever face 👇

I wish someone had given me this list when I was stuck.

(Would’ve saved me days of overthinking and going through 100+ YouTube videos)

𝗧𝗼𝗽 𝗙𝗿𝗲𝗲 𝗥𝗲𝘀𝗼𝘂𝗿𝗰𝗲𝘀 𝗳𝗼𝗿 𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻:

https://www.linkedin.com/posts/rajatgajbhiye_these-9-system-design-patterns-cover-90-activity-7387481978461143041-ikPA

Do read ❤️👍🏼

No matter if you have 1, 2, or 5 years of experience.

Truth is:

If you are giving an interview at any good product-based company or MNCs, 3-5 rounds are just:
- DSA, Development (2 to 3 rounds), and
- System Design (1 to 2 rounds)

No matter what others say, that's my experience: we have to excel in these three areas (DSA, Development, and System Design, including LLD and HLD) to clear any interview; there are no shortcuts.
The playlist below will help you in your preparation:

https://www.linkedin.com/posts/rajatgajbhiye_no-matter-if-you-have-1-2-or-5-years-of-activity-7387841020731944960-xpns

Do read ❤️👍🏼

I am 𝗵𝗶𝗿𝗶𝗻𝗴 you as a 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿 if you can answer these 35 questions:

https://www.linkedin.com/posts/rajatgajbhiye_i-am-%F0%9D%97%B5%F0%9D%97%B6%F0%9D%97%BF%F0%9D%97%B6%F0%9D%97%BB%F0%9D%97%B4-you-as-a-%F0%9D%97%A6%F0%9D%97%BC%F0%9D%97%B3%F0%9D%98%81%F0%9D%98%84%F0%9D%97%AE%F0%9D%97%BF-activity-7388200400224555009-dFon

Do read ❤️

This is my updated resume, having an 𝗔𝗧𝗦 𝗦𝗰𝗼𝗿𝗲 𝗼𝗳 𝗺𝗼𝗿𝗲 𝘁𝗵𝗮𝗻 𝟴𝟬

Here are some strategies I followed while creating this 👇

https://www.linkedin.com/posts/rajatgajbhiye_my-resume-activity-7388565579340849152-em4e

Do read ❤️👍🏼

Microsoft asked this exact question in 2 back-to-back interviews.
CTC: 30LPA

https://www.linkedin.com/posts/rajatgajbhiye_microsoft-asked-this-exact-question-in-2-activity-7388804761715621888-5ACy

Do read ❤️👍🏼

Multiple offers and smart negotiation got me 26LPA in 40 days, even when my notice period was 90 days.

What worked for me:

https://www.linkedin.com/posts/rajatgajbhiye_multiple-offers-and-smart-negotiation-got-activity-7388930128363388929-8aCL

Do read ❤️👍🏼

I solved 0 System Design problems.

And still cracked a 25 LPA offer.

https://www.linkedin.com/posts/rajatgajbhiye_i-solved-0-system-design-problems-and-activity-7389301273432309760-COwx

Do read ❤️👍🏼

30LPA at BlackRock

This is the classic question they generally ask

https://www.linkedin.com/posts/rajatgajbhiye_30lpa-at-blackrock-this-is-the-classic-activity-7389539180252495872-krRy

Do read 👍🏼❤️

2020 → graduated with 6.79cgpa, unplaced
2021 → rejected in 12+ off-campus interviews
2022 → joined Suma with 3LPA
2023 → got my 1st freelance client

https://www.linkedin.com/posts/rajatgajbhiye_2020-graduated-with-679cgpa-unplaced-activity-7389657114052464640-vSI0

Do read ❤️👍🏼

I did not like DSA until

I found these 16 problem-solving patterns

https://www.linkedin.com/posts/rajatgajbhiye_i-did-not-like-dsa-until-i-found-these-16-activity-7389870127493648384-UZsP

Do read ❤️👍🏼

50LPA at Amazon

These were the EXACT questions asked in 2025

https://www.linkedin.com/posts/rajatgajbhiye_50lpa-at-amazon-these-were-the-exact-questions-activity-7390379200823574528-NKZz

Do read ❤️👍🏼

65 companies targeted
34 referrals
17 interviews
12 rejections
5 offers

Here’s what actually made the difference:

https://www.linkedin.com/posts/rajatgajbhiye_65-companies-targeted-34-referrals-17-interviews-activity-7390751069527752704-7vWp

Do read ❤️👍🏼

India created history today!
Our women’s team just lifted the 2025 World Cup, pure goosebumps moment🔥

To celebrate this victory, I’m giving 50% OFF on my System Design Guide for every engineer who dreams big like Team India 💪

Get the Guide here:
- https://topmate.io/rajat_gajbhiye/1446625?coupon_code=INDIA50

Use code INDIA50

Let’s celebrate excellence, on the field and in your career :)

10 projects that will get you shortlisted at MNCs

https://www.linkedin.com/posts/rajatgajbhiye_10-projects-that-will-get-you-shortlisted-activity-7391059446375911424-IuPs

Do like ❤️👍🏼

Recently, I got a 20LPA Job Offer from Oracle
Position: Backend Engineer

https://www.linkedin.com/posts/rajatgajbhiye_recently-i-got-a-20lpa-job-offer-from-oracle-activity-7391319254731673600-iRlG

Do read ❤️👍🏼

Recently, I got a 20LPA Job Offer from Oracle
Position: Backend Engineer

𝗣𝗵𝗼𝗻𝗲 𝗦𝗰𝗿𝗲𝗲𝗻𝗶𝗻𝗴 𝗥𝗼𝘂𝗻𝗱
- Intro: Brief discussion about my background, tech stack, projects, current role & motivations
- A couple of “theory + practical” Java questions (difference between interface and abstract class, synchronization)

𝟭𝘀𝘁 𝗥𝗼𝘂𝗻𝗱 (𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 / 𝗖𝗼𝗱𝗶𝗻𝗴)
- Given a tree, find the diameter (longest path)
- Given an array of integers, find count of subarrays whose sum equals K
- Difference between HashMap and ConcurrentHashMap
- How you’d handle thread safety in a microservice
- Write a small snippet for producer-consumer using wait/notify or blocking queue

𝟮𝗻𝗱 𝗥𝗼𝘂𝗻𝗱 (𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 + 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲)
- High-level: Design a URL shortening service
- How to handle high traffic / scaling / rate limit
- Discussion on trade-offs (sharding vs caching, consistency vs availability, etc)

𝟯𝗿𝗱 𝗥𝗼𝘂𝗻𝗱 (𝗧𝗲𝗰𝗵 𝗟𝗲𝗮𝗱)
- Asked me to explain one of my past features in detail (end to end)
- How modules communicate, failure modes, retries, fallback logic
- GC strategies, memory leaks, class loaders
- How to debug production issues (thread dumps, monitoring, alerting)
- How services communicate (sync vs async), circuit breakers, idempotency
- Database scaling (read replicas, partitioning)

𝗠𝗮𝗻𝗮𝗴𝗲𝗿𝗶𝗮𝗹/𝗟𝗲𝗮𝗱𝗲𝗿𝘀𝗵𝗶𝗽 𝗥𝗼𝘂𝗻𝗱
- Behavioral: conflict resolution, how you handled missed deadlines, working with cross-teams
- Leadership/initiative: times you improved an existing system or took ownership
- Roadmap alignment: what you want to do in 1–2 years, how your growth looks

I’m happy to share that 4500+ people are already using my System Design Guide.

The feedback has been amazing, many have cracked top product-based companies with the help of this material.

𝗢𝗳𝗳𝗲𝗿𝗶𝗻𝗴 𝟰𝟬% 𝗼𝗳𝗳 𝗳𝗼𝗿 𝗮 𝗹𝗶𝗺𝗶𝘁𝗲𝗱 𝘁𝗶𝗺𝗲!

𝗚𝗲𝘁 𝘁𝗵𝗲 𝗴𝘂𝗶𝗱𝗲 𝗵𝗲𝗿𝗲:
- https://topmate.io/rajat_gajbhiye/1446625?coupon_code=SDE40

Use code 𝗦𝗗𝗘𝟰𝟬 to grab your discount (only for the next few users).