A company processing $21 billion daily lost $440 million
in 45 minutes.
Not hackers. Not a crash.
One server out of eight didn't get updated during deployment.
3 lessons. Real case study. Full breakdown 👇
https://t.co/5hXC5weJ7e
900 million users.
50 engineers.
While others hired more people to scale —
WhatsApp chose the right tool.
Erlang. Built for telecoms in the 1980s.
Weaponized for messaging in 2014.
That's architectural judgment.
Full breakdown on YouTube 👇
https://t.co/NX7NATC9fE
Knight Capital was one among the biggest US market markers and brokers as of the time before August 1st, 2012.
They are known for their fast market execution and ahead of their competitors.
As of the time they had cash and equities worth $360 million...
Have you heard about the story of knights capital Group?
A tragic incident that happened to the New York Stock Exchange (NYSR).
A financial company that could not survive system failure not because of a line of code but because of a partial deployment...
Most developers learn frameworks few learn system thinking.
They know how to build endpoints, but struggle to reason about:
-Scalability
-Failures
-Data flow
-Bottlenecks
-Trade-offs
Framework knowledge gets you started, System thinking is what makes engineers valuable.⚖️
Distributed Data Systems simply means:
data is stored and processed across multiple machines instead of one server.
Why?
- Scalability
- Fault tolerance
- High availability
- Faster processing
That’s why companies like Netflix, Google, and Amazon rely heavily on them.
CAP theorem humbled a lot of backend engineers.
You cannot fully guarantee:
Consistency
Availability
Partition tolerance
Once network partition happens
one has to give.
Distributed systems are not about perfect choices
They are about choosing the failure you can live with.⚖️
Distributed systems sound powerful until network failure enters the chat.
Many backend devs focus on scalability, but forget:
Partial failures
Replication lag
Eventual consistency
Distributed tracing
A system is not truly distributed until failure becomes part of the design ⚖️