r1| cashflo | sde 2

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cashflo
· sde 2
January 24, 2026 · 8 reads

Summary

I attended my Round 1 interview for an SDE 2 role at Cashflo, which primarily focused on system design challenges related to read-heavy systems and S3 encryption policies, along with a graph problem.

Full Experience

This was R-1

Suppose when lot of loads come in service throws 500 error , but works for thre single request.

We have a read heavy system with postgres and redis, Design the strategy.

S3 encryption policies.

Graph https://leetcode.com/discuss/post/483660/google-phone-currency-conversion-by-anon-upqo/

Answer to first was resource exhaustion happened may be horizontal scaling, it was more on thread pooling or memory leaks and how to manage them.

read heavy systems use cache-aside read.

Interview Questions (3)

1.

System Design: Handling 500 Errors in Read-Heavy System

System Design

Suppose when lot of loads come in service throws 500 error , but works for three single request. We have a read heavy system with postgres and redis, Design the strategy.

2.

S3 Encryption Policies

System Design

S3 encryption policies.

3.

Currency Conversion Graph Problem

Data Structures & Algorithms
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