Scale Engineer

Software Engineer

Software EngineerE7Hard

DoorDash is looking for experienced Software Engineers (E7 level) to join our dynamic team. This role involves designing, developing, and scaling complex systems that power our innovative platform. We seek individuals with a strong technical background, excellent problem-solving skills, and a passion for building high-quality software.

Rounds·4

Timeline·~4d

Experience·8 - 15 yrs

Comp band·US$180000 - US$250000

Interview time·180 min

Evaluation

What they measure.

  • Technical depth and breadth in relevant areas (e.g., distributed systems, algorithms, data structures).
  • Problem-solving skills and analytical thinking.
  • System design and architectural capabilities.
  • Coding proficiency and software development best practices.
  • Communication and collaboration skills.
  • Leadership potential and ability to influence.
  • Cultural fit and alignment with DoorDash values.

Preparation

How to prepare.

Tips

  1. Review fundamental computer science concepts: data structures, algorithms, operating systems, and databases.
  2. Practice coding problems on platforms like LeetCode, HackerRank, or AlgoExpert, focusing on medium to hard difficulty.
  3. Study system design principles and common architectural patterns (e.g., microservices, load balancing, caching, databases).
  4. Prepare for behavioral questions by using the STAR method (Situation, Task, Action, Result) to structure your answers.
  5. Research DoorDash's business, products, and engineering culture.
  6. Understand the specific technologies and tools commonly used at DoorDash (e.g., Java, Python, Go, AWS, Kubernetes).
  7. Prepare thoughtful questions to ask the interviewers about the role, team, and company.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms (LeetCode Mediums)

Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash maps, heaps, sorting, searching, dynamic programming, and graph traversal algorithms. Practice implementing these and analyzing their time and space complexity. Aim for 2-3 LeetCode medium problems per day.

Questions

Commonly asked.

  • Design a system to handle real-time order updates for millions of users.
  • Describe a time you had to optimize a critical system for performance. What was your approach and what were the results?
  • How would you design a recommendation engine for restaurants based on user preferences and order history?
  • Discuss your experience with distributed systems and challenges you've faced.
  • How do you approach mentoring junior engineers and fostering a collaborative team environment?
  • Tell me about a time you had to deal with significant technical debt. How did you prioritize and address it?
  • Design a system for managing driver availability and dispatching in real-time.
  • What strategies do you employ for effective cross-functional collaboration?
  • How do you stay updated with emerging technologies and evaluate their potential adoption?
  • Describe a situation where you had to influence stakeholders to adopt a new technology or approach.

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

San Francisco Bay Area

Interview focus

Deep dive into system design and architecture for large-scale, distributed systems.Emphasis on leadership, mentorship, and influencing technical direction.Understanding of operational excellence and on-call responsibilities.Behavioral questions focused on navigating complex technical and organizational challenges.

Common questions

  • How would you design a system to handle real-time order updates for millions of users?
  • Describe a time you had to optimize a critical system for performance. What was your approach and what were the results?
  • Discuss your experience with distributed systems and challenges you've faced.
  • How do you approach mentoring junior engineers and fostering a collaborative team environment?
  • What are your thoughts on the current state of cloud computing and its impact on software development?

Tips

  • Be prepared to discuss your most impactful projects in detail, focusing on your individual contributions and technical leadership.
  • Demonstrate a strong understanding of trade-offs in system design and architectural decisions.
  • Highlight your experience in leading technical initiatives and mentoring other engineers.
  • Showcase your ability to communicate complex technical concepts clearly and concisely.

Rounds

Round-by-round.

Expand a step for evaluation criteria, sample questions, and prep notes.

DSA

Coding questions at DoorDash.

Frequently reported on DoorDash loops

View all at DoorDash

Other guides

More at DoorDash.