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DoorDash | SE2 | India | Rejected

Round 1: Technical Screening

Questions: Problem: Number of Provinces

Candidate's Approach
  • Explained approach using DFS and DSU.
  • Implemented the solution using DFS.
  • Discussed time and space complexity of both DFS and DSU approaches.
Interviewer's Feedback

No feedback provided.


Round 2: Coding (DSA)

Questions: Problem: Next Greater Element III

Candidate's Approach
  • Started with a brute-force solution using recursion.
  • Discussed and implemented the optimal solution afterward.
Interviewer's Feedback

No feedback provided.


Round 3: System Design & Domain Knowledge

Questions: Design a Review System.

Candidate's Approach
  • Clarified functional and non-functional requirements.
  • Proceeded with the design based on the discussion of the current project.
Interviewer's Feedback

The interviewer didn’t seem very satisfied, possibly rating the candidate as Hire/No-Hire.


Round 4: Coding (DSA)

Questions: Problem: Search Suggestions System

Candidate's Approach
  • Proposed two approaches: Sorting + Binary Search and Trie.
  • Implemented the Trie solution and discussed edge cases.
Interviewer's Feedback

No feedback provided.


Round 5: Values

Questions: Behavioral questions (exact questions not remembered).

Candidate's Approach

Discussed projects worked on and answered questions about the current project.

Interviewer's Feedback

No feedback provided.


Final Thoughts: The last four rounds were held over two consecutive days. Overall, I had a positive experience and felt confident that I would receive a Strong Hire for the role. However, the result came back as No-Hire, and there was no feedback provided as to what went wrong.

I did notice that the foreign interviewers (mostly from China) were extremely helpful throughout the process, which made the interviews much smoother.

Preparation Strategy: I focused on solving DoorDash-tagged questions on LeetCode and also went through some interview experiences to get an idea of the types of questions asked.