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Rejected

Backend Developer at DoorDash

Difficulty
Process took
2-3 Weeks
Rounds
4
Format
Remote
Applied via
Referral

How it went

Not every interview is a fit. Sometimes, it’s about culture, team needs, or just luck

What they would tell you

Not every interview is a fit. Sometimes, it’s about culture, team needs, or just luck

How to prepare

No detailed feedback, just a polite rejection

Their background

Working with service based company since 2 year 5 month

Round by round

  1. 1

    Coding Round 160 min

    I expected this round to be about object-oriented design, class creation but a coding problem was asked, Find the Largest Submatrix with all 1s Task: Find the largest rectangle containing only 1s and return its area

  2. 2

    Debugging60 min

    In this round, I was asked to debug a concurrent queue implementation with race conditions. The problem had about 4-5 bugs including synchronization issues and incorrect dequeue logic After fixing the bugs, the interviewer asked follow-ups

  3. 3

    Design60 min

    In the third round, question was around real-time analytics dashboard for tracking app usage metrics

    • Explain how would collect real-time events from multiple sources (mobile, web)
    • Handle high-throughput ingestion and aggregation
  4. 4

    HM Round60 min

What came up

MediumRemote2 3 years

A candidate-reported account, lightly edited. Interview processes change by team and date.

Sources

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