Abhay Chauhan

Building and reasoning about large-scale backend systems.
Distributed systems, AdTech, real-world trade-offs.

[Abhay Chauhan @codedagger]

When systems slow down, the first instinct is usually:

“Let’s add more cache.”
That helps — until it doesn’t.

At scale, read performance is rarely limited by a single slow component.

👉 Read the full article below.

https://t.co/Usbe0rrhVc

[Abhay Chauhan @codedagger]

Caching is one of the first tools engineers reach for when systems slow down.

Add Redis. Add Memcached. Lower latency. Problem solved. Until it isn’t.

👉 Read the full article below.

https://t.co/musfBjGweT

[Abhay Chauhan @codedagger]

When people hear sharding, they think:

“Split data across machines → system scales.”
That’s only partly true.

In real systems, sharding is about preventing one machine from becoming a bottleneck, not magically handling infinite traffic.

https://t.co/EUc3n1f5VM

[Abhay Chauhan @codedagger]

One of the most expensive mistakes teams make is asking:

“Which database should we use?”

The better question is:

“What problem are we solving today, and which problems will appear at 10× scale?”

👉 Read the full article below.

https://t.co/6qNeoVtoCZ

[Abhay Chauhan @codedagger]

"API Design at Scale" (What breaks after your first million requests)

Most APIs are designed for correctness. Very few are designed for failure, retries, evolution, and abuse.

https://t.co/xW3TKyAxro

[Abhay Chauhan @codedagger]

Most engineers learn load balancing as

“Put a load balancer in front. Use round-robin. Done.”

That mental model works at 1k RPS. It breaks completely at 100k–1M RPS, multi-region systems, or stateful services.

👉 Read the full article below.

https://t.co/s77RWl8BO7

[Abhay Chauhan @codedagger]

Capacity estimation is often treated like a warm-up exercise in system design. A few numbers. Some back-of-the-envelope math. Then straight to architecture diagrams. That approach misses the point...

Click to read: https://t.co/HdeD75cGNq

[Abhay Chauhan @codedagger]

Functional vs Non-Functional Requirements in Ad Impression Tracking (Beyond the Obvious)

https://t.co/sKUD3vB4Ky

#SoftwareEngineering

[Abhay Chauhan @codedagger]

@excitel_rocks The internet has been unreliable for the two week. Every day it stops working after a few hours. Please look into this — it’s affecting daily work and usage.

[Abhay Chauhan @codedagger]

@SBICard_Connect I am available anytime.

[Abhay Chauhan @codedagger]

@JioMart @JioCare Order was supposed to ship on 8th july, from then onwards the shipping date changes everyday. Already complaint on customer care 2 times no resolution till now. Please refund the money back now to the source.

[Abhay Chauhan @codedagger]

@YESBANK No resolution till now, no call from customer care at all.

Srsly, Yes Bank customer service is pathetic.

[Abhay Chauhan @codedagger]

@YESBANK I want to talk to the customer care by today, please arrange a call. I tried many time to call but not able to. Once I type my registered mobile number the call auto cuts.

[Abhay Chauhan @codedagger]

@YESBANK
Issue related to credit card.

Bank Employee said contact customer care.
Called Customer Care, call disconnect automatically everytime.
Emailed reply will be provide after 48 hours.

How to contact? Seems so difficult process to reach out to someone.

[Abhay Chauhan @codedagger]

@YESBANK Replied on DM. Please have a look.

[Abhay Chauhan @codedagger]

@CRED_support I haven’t received any call, could you please connect it’s a bit urgent.

[Abhay Chauhan @codedagger]

@JioMart I haven't got my this delivery till yet. No resolution from your side. I have already made the online payment. Either get this resolved or refund my money. Already DM'd the handle yesterday on twitter.

[Abhay Chauhan @codedagger]

@PaytmMoneyCare @PaytmMoneyCare I have responded to the DM. Please check.

[Abhay Chauhan @codedagger]

@PaytmMoney @PaytmMoneyCare I have an issue with some stuff over the app. Please check the DM.

[Abhay Chauhan @codedagger]

@HDFCERGOHealth Do you don't provide health insurance for a person even after permanently excluding a pre existing disease?