CodeWithRani

Software Engineer | Author | Content Creator

[CodeWithRani @theRH07]

@angelina_quan so cool

[CodeWithRani @theRH07]

@UnBearAbull @Heyabhi29 i love people with common sense

[CodeWithRani @theRH07]

Read somewhere "a Java developer who truly understands the JVM — garbage collection tuning, virtual threads via Project Loom, reactive streams with Project Reactor — is quietly becoming the rarest person in the room." just keeping it here for the reminder lol

[CodeWithRani @theRH07]

@narendramodi @kharge bro fr!??? @narendramodi

[CodeWithRani @theRH07]

Starting something new, let's see how it goes. #appdevelopment #reactnative #expo

[CodeWithRani @theRH07]

This week I tried optimizing a production endpoint.
First instinct? Rewrite the query.
Because performance issue = database issue… right?
Wrong.

The query wasn’t slow.
The architecture was fragile.
here’s what actually fixed it:
Read:
https://t.co/MSsmGAm2D1

[CodeWithRani @theRH07]

@AbhiCodes15 git cherry-pick, thanks to my start up :|

[CodeWithRani @theRH07]

@Adidotdev as someone who recently gave Amazon interview and brutually failed, yeah DSA is very very worth it.

[CodeWithRani @theRH07]

@_adityaa21 snap saved memeory from my gallery so i wouldn't call it useless lol (linkedin helped me in building network which kinda helped a lot in my job search) but easy apply is the most useless thing everrrr

[CodeWithRani @theRH07]

@karthikponna19 backend developer lol

[CodeWithRani @theRH07]

The results:

Before: 1+ min
After round 1: ~30 sec
Final: < 4 seconds ⚡
Same API. Same data.
Just better engineering.

[CodeWithRani @theRH07]

Our API was “working fine”…
Until we ran it on a real org. 😅
50+ teams
500+ members
→ Timeout. Every time.

That’s when the real engineering began. 🧵

[CodeWithRani @theRH07]

5/
Step 2: Java-side improvements
• removed unnecessary loops
• reduced in-memory processing
• got rid of the JSON conversion that was taking the most amount of time.

[CodeWithRani @theRH07]

NO SHIT DSA IS INDEED ABOUT PATTERNS

[CodeWithRani @theRH07]

@OjasSharma276 start-up, it'll teach you ownership too.

[CodeWithRani @theRH07]

day in nutshell-
9 hours of work
2 hours of DSA
1.5 hours of gym
1 hour of breakdown
🙂🙂🙂

[CodeWithRani @theRH07]

@ujjwalscript Insightful article, as someone who started a new job in 2026, I can already feel these changes at my workplace. One question tho, about "Become a Product Engineer", what would be your advice to junior devs about this? Specially on how to get started.