The DoorDash Software Engineer E3 interview process is designed to assess a candidate's technical skills, problem-solving abilities, and cultural fit for the company. It typically involves multiple rounds, including HR screening, technical interviews focusing on data structures and algorithms, system design, and behavioral questions. The goal is to identify candidates who can contribute effectively to DoorDash's engineering teams and uphold its values.
Rounds·4
Timeline·~7d
Experience·2 - 5 yrs
Comp band·US$110000 - US$150000
Interview time·180 min
Evaluation
Preparation
Tips
Study plan
Fig · Study plan — 04 phases
01 / 04Phase 01 of 04
Weeks 1-2: Data Structures & Algorithms Fundamentals. Practice 2-3 problems daily.
Weeks 1-2: Focus on core data structures and algorithms. Cover arrays, linked lists, stacks, queues, trees (binary trees, BSTs, heaps), graphs, and hash tables. Practice common algorithms like sorting (quicksort, mergesort), searching (binary search), recursion, and dynamic programming. Aim to solve 2-3 problems per day.
Phase 02 of 04
Weeks 3-4: System Design Concepts. Study case studies and design common systems.
Weeks 3-4: Dive into system design. Study concepts like API design, database choices (SQL vs. NoSQL), caching strategies, load balancing, message queues, and microservices architecture. Work through common system design case studies and practice designing systems like a URL shortener, a Twitter feed, or an e-commerce platform.
Phase 03 of 04
Week 5: Behavioral Interview Prep. Use STAR method for past experiences.
Week 5: Prepare for behavioral interviews. Identify key projects and experiences that demonstrate your skills in problem-solving, teamwork, leadership, and handling challenges. Practice answering common behavioral questions using the STAR method. Reflect on your motivations for joining DoorDash.
Phase 04 of 04
Week 6: Mock Interviews & Review. Practice and refine answers.
Week 6: Mock interviews and review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Review your weak areas identified during practice and mock interviews. Prepare specific questions to ask the interviewers.
Questions
Locations
Fig · Regions — 02 locations
01 / 02Location
Interview focus
Common questions
Tips
Location
Interview focus
Common questions
Tips
Rounds
Expand a step for evaluation criteria, sample questions, and prep notes.
Technical Interview - Data Structures And Algorithms · 45 min · Software Engineer
This round focuses on your fundamental computer science knowledge. You will be asked to solve coding problems that test your understanding of data structures (e.g., arrays, linked lists, trees, graphs, hash maps) and algorithms (e.g., sorting, searching, dynamic programming). The interviewer will assess your ability to write clean, efficient, and correct code, as well as your problem-solving approach and communication skills.
What they look for
Evaluation
Sample questions
Given a binary tree, find its maximum depth.
Implement a function to find the kth smallest element in an unsorted array.
Write a function to check if a string is a palindrome.
Prep for this round
Common rejection reasons
System Design Interview · 60 min · Senior Software Engineer / Engineering Manager
This round evaluates your ability to design scalable, reliable, and maintainable software systems. You will be presented with a high-level problem and asked to design a system to solve it. This involves discussing various components, data storage, APIs, scalability considerations, and potential bottlenecks. The interviewer will assess your understanding of distributed systems, databases, caching, and other relevant technologies.
What they look for
Evaluation
Sample questions
Design a system like TinyURL.
Design a news feed system.
How would you design a rate limiter?
Prep for this round
Common rejection reasons
Behavioral Interview · 45 min · Hiring Manager / Senior Team Member
This round focuses on your behavioral and cultural fit. You will be asked questions about your past experiences, how you handle challenges, work with others, and your motivations. The interviewer will assess your alignment with DoorDash's core values and your potential to thrive in the company culture. Using the STAR method (Situation, Task, Action, Result) is highly recommended for answering these questions.
What they look for
Evaluation
Sample questions
Tell me about a time you failed and what you learned from it.
Describe a situation where you had to work with a difficult colleague.
Why are you interested in DoorDash?
Prep for this round
Common rejection reasons
Hiring Manager Interview · 30 min · Hiring Manager
This is typically the final round with the hiring manager. It's an opportunity for the manager to assess your overall fit for the team, discuss your career goals, and answer any remaining questions you might have. They will also gauge your understanding of the role and how you can contribute to the team's objectives. This round is also crucial for you to determine if the role and team are the right fit for you.
What they look for
Evaluation
Sample questions
What are your career goals for the next 3-5 years?
What are you looking for in your next role?
Do you have any questions for me?
Prep for this round
Common rejection reasons
DSA
Frequently reported on DoorDash loops
Other guides
