Explain a Project You Built from Scratch
Company: DoorDash
Role: Software Engineer
Category: Behavioral & Leadership
Difficulty: medium
Interview Round: Onsite
Describe a project you built from scratch. Explain the user problem, your technical decisions, the implementation flow, and what you personally delivered.
### What a Strong Answer Covers
A complete project narrative with concrete architecture, tradeoffs, validation, and outcome. Be precise about collaborators and your own responsibility.
### Follow-up Questions
- Which design choice would you change if the workload grew substantially?
Overview: Present a project built from scratch through its user need, architecture, personal contribution, and completed outcome. Explain the tradeoffs behind the initial scope and how evidence would guide later scaling.
Read the full DoorDash Software Engineer interview experience this question came from