Sanchit Kulkarni

Building skills to develop and sell a product. Principal Software Engineer @Makemytrip

[Sanchit Kulkarni @_iamsanchit]

Absolutely brilliant day. Cannot believe I met @vishy64theking
.
#westbridgeanandchessacademy #waca

@ChessbaseIndia , thank you for the invite. 🙏🏼 😇

[Sanchit Kulkarni @_iamsanchit]

@shivarajapple @myntra @MyntraSupport Myntra should just let you keep the bag at this point

[Malay Krishna @Malay4Product]

I taught JEE physics for years. That paper breaks strong kids in three hours.

This exam is five hours of theory and five hours of lab work, and these five did close to perfect scores on it.

Let me tell you what actually happened.

The International Physics Olympiad is the world championship of school physics. It was the 56th edition. Held in Bucaramanga, Colombia, from July 5 to 12.

381 students. More than 85 countries. Every one of them the best physics student their country could find.

India sent five kids.

All five came back with gold.

Their names are Kanishk Jain from Pune. Riddhesh Anant Bendale from Indore. Rishit Garg from Dwarka in Delhi. Shresth Suraiya from Mumbai. Svarit Joshi from Ahmedabad.

We know a hundred cricketers by their nickname and not one of these boys. :)

That clean sweep put India at joint World Number One. Tied with China, Russia, Kazakhstan, South Korea and Taiwan.

Those are countries that pour serious money and national pride into science education. We are standing level with them.

Now here is what the exam actually was.

Two papers. Each five hours long.

The theory paper had three problems. One on the thermodynamics of paramagnetic cooling. One on the photoionisation of ozone. One on the dynamics of electron positron pairs.

The experimental paper was another five hours in a lab, working through heat transfer and thermodynamic processes in fluids.

That means you get given equipment you have never seen, and you have to design your own experiment, take your own readings, handle the errors, and reach a real answer.

Not multiple choice. No shortcuts. No pattern recognition. You either understand physics or you sit there for five hours.

HBCSE says the Indian students were near perfect on theory and excellent on the practical too.

Now, this was India's 27th appearance at the IPhO.

Across all those years, about 44 percent of Indian students have won gold, 41 percent silver, 10 percent bronze.

In the last ten years, every single Indian student has come home with a medal. 62 percent gold, 38 percent silver.

Not one kid has gone and come back empty handed in a decade.

Five golds in one year has happened only twice. This year, and in 2018.

So who built this.

The programme is run by HBCSE, the Homi Bhabha Centre for Science Education. It sits under TIFR, which sits under the Department of Atomic Energy.

They run the whole funnel. A national exam, then a national olympiad, then a brutal selection and training camp, and out of everyone in the country, five kids get on a plane.

The team was led by Professor Anwesh Mazumdar of HBCSE-TIFR and Dr Leena Joshi from St Xavier's College, Mumbai.

The scientific observers were Professor Ananda Dasgupta from IISER Kolkata and Nisha Kelkar from Gogate-Joglekar College in Ratnagiri.

Yes. Ratnagiri. A college in a small coastal town in Maharashtra.

This is public education doing something the private coaching industry could never do on its own.

The coaching industry is very good at one thing. Teaching you to solve a known problem fast.

That is what JEE and NEET reward, and I say that with love because I was part of that world.

But an olympiad paper does not have a known type. There is no shortcut chapter. There is no formula sheet that saves you. You have to sit with a problem you have never seen and think.

That is a completely different muscle. And a government funded centre has been quietly building it in Indian teenagers for 27 years.

So yes, be proud. Loudly.

HBCSE also shared that around 64 percent of India's olympiad medallists go on to do a PhD.

But only about 32 percent of medallists end up settling in India.

I do not say that to spoil the moment. These kids owe the country nothing. They earned every option they have.

But it should tell us something. We are excellent at finding this talent. We are excellent at training it. We are still not great at giving it somewhere worth staying.

Congratulations Kanishk, Riddhesh, Rishit, Shresth and Svarit. This is one of the best things an Indian did this year and most of the country will never hear about it.

[Sanchit Kulkarni @_iamsanchit]

#BengaluruRains

[Ivan Landabaso @IvanLandabaso]

Meta's CTO guide to starting a new job.

One of the most useful things I learned there:

[Sanchit Kulkarni @_iamsanchit]

@dale_vaz This is indeed next level stuff. Want to try some of this and try to learn a thing or two implementing the same.

[Dale Vaz @dale_vaz]

2 servers.                         
8 CPUS.                                             
Processing 8 billion ticks per day. Under 2 milliseconds.  
Running at 20% CPU utilization. 

Sometimes the best infrastructure is the one you build yourself. 

That's our market feed data infrastructure at Sahi. This processes high speed feeds from the Exchanges and builds the critical data products that power your trading experience on Sahi.  

Rather than throw hardware at the problem, our engineering team relied upon thoughtful architecture choices:                                                                                                       
 → Lock-free Rust actors                                                                                                             
 → Pre-serialized message caching                                                                                                        
 → Time-bucketed partitioning                                                                                                          
 → Token-aware database routing                                                                                                         

 Full technical deep-dive:                                                                                                            
 https://t.co/yxp6WWJs8K 

@Sahi_HQ

[Abhishek Singh @0xlelouch_]

As a Backend Engineer in 2026 aiming for Staff, please learn:

1. One language deeply (Go/Rust/Java)
Not “I can write APIs”, but runtime model, memory, concurrency, profiling, GC behavior (if any), and how to read stack traces like a native.

2. Data modeling and storage fundamentals
Relational modeling, constraints, isolation levels, indexes, query plans, locks, deadlocks, migrations, backup/restore, partitioning. Most “scaling” problems are schema + query shape problems.

3. Distributed systems basics that actually show up in prod
Consistency vs availability, timeouts, retries, idempotency, backpressure, message ordering, leader election, clock skew, eventual consistency, and what happens during partial failures.

4. API design and contracts
Versioning, pagination, filtering, error models, idempotency keys, rate limits, backwards compatibility, and how to avoid breaking mobile clients for months.

5. Performance and capacity engineering
Latency budgets (p50/p95/p99), tail latency causes, load testing, queueing theory intuition, connection pools, CPU vs IO bound, and capacity planning with real numbers.

6. Reliability engineering
SLOs/SLIs, incident response, postmortems, alerting that does not spam, error budgets, graceful degradation, feature flags, circuit breakers, bulkheads.

7. Observability like a pro
Structured logs, metrics, tracing, correlation ids, RED/USE metrics, sampling strategies, and how to debug “it is slow sometimes” without just guessing.

8. Security fundamentals
AuthN/AuthZ, least privilege, secrets management, token expiry, OWASP basics, SSRF, injection, secure defaults, audit logs, threat modeling for your own services.

9. Messaging and async systems
Kafka/Rabbit/SQS semantics, at-least-once vs exactly-once (and why “exactly once” is mostly a marketing term), consumer groups, retries, DLQs, replay, dedupe.

10. Caching with correctness
Cache invalidation strategies, TTLs, stampede protection, read-through/write-through, negative caching, and when caching makes bugs harder than latency.

11. Infrastructure literacy
Linux basics, networking (DNS, TCP, TLS), containers, k8s concepts, autoscaling, deployment strategies (blue/green, canary), and what your cloud bill is really paying for.

12. System design, but with tradeoffs
Designing is picking pain. Learn to write down constraints, failure modes, data growth, and operational cost. Staff is judged on tradeoffs, not diagrams.

13. Codebase leadership
Design docs, RFCs, review quality, mentorship, aligning teams, reducing complexity, owning a subsystem end-to-end, making boring systems that do not wake people at 2am.

14. Pick ONE domain to go deep
Payments, search, streaming, identity, infra, data platform, etc. Staff engineers are “the person for a hard area”, not generic API writers.

Stop hopping stacks every month. Pick a lane, build proof of reliability, and become the person people call when prod is on fire. That is Staff.

[Sanchit Kulkarni @_iamsanchit]

@PaytmTravel @Paytmcare

Why is this support email getting ignored? Email subject = “Avaya - 20251018175214”

Not expected at all.

[sneha @itspsneha]

https://t.co/aWH6KpBOnS

[Sanchit Kulkarni @_iamsanchit]

@meesho_support Have messaged on Instagram. Let’s hear new excuses now @meesho_support . @viditaatrey , this is a clear case of tech issue on your platform followed by a pathetic customer care service.

[Sanchit Kulkarni @_iamsanchit]

@Meesho_Official , @Paytmcare

My mom had ordered something from Meesho where payment happened but order never got placed. Meesho support is saying they have reversed the order and payment/refund would’ve happened within 24-48 hours but haven’t received any. Can you please help?

[Sanchit Kulkarni @_iamsanchit]

@meesho_support @viditaatrey AI customer care isn’t working as expected. Please help expedite

[Sanchit Kulkarni @_iamsanchit]

@meesho_support If the order is not placed, how will I find it in “orders” section??

[Sanchit Kulkarni @_iamsanchit]

@meesho_support Your AI customer service agent is hallucinating with these generic messages posted twice. Can you please put some humans behind the line and get this resolved?

[Sanchit Kulkarni @_iamsanchit]

@Paytmcare Have sent you the DM

[Sanchit Kulkarni @_iamsanchit]

@meesho_support Can you DM me? Since I don’t have verified twitter, I’m not able to message you.

[Sanchit Kulkarni @_iamsanchit]

@we_are_cult I haven’t missed a single class but still I have got 2 no-shows. Please check logs of attendance devices or verify with centre manager.

[Sanchit Kulkarni @_iamsanchit]

@SBICard_Connect
Your eKYC verification has been failing from last 2 weeks.
After Successful authentication from DigiLocker, the screen starts loading

Then the following screen appears. Unable to create a straight forward support ticket as well. Please help.