Scale Engineer

Software Engineer

Software EngineerL5Medium to Hard

The Software Engineer L5 interview at Nextdoor is designed to assess a candidate's technical proficiency, problem-solving abilities, system design skills, and cultural fit within the company. The process typically involves multiple rounds, including technical screenings, coding challenges, system design discussions, and behavioral interviews.

Rounds·4

Timeline·~14d

Experience·5 - 10 yrs

Comp band·US$140000 - US$180000

Interview time·195 min

Evaluation

What they measure.

  • Problem-solving skills
  • Algorithmic thinking
  • Data structures knowledge
  • Code quality and efficiency
  • Testing and debugging abilities

Preparation

How to prepare.

Tips

  1. Review fundamental data structures and algorithms.
  2. Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte.
  3. Study system design concepts, including scalability, databases, caching, and distributed systems.
  4. Prepare examples for common behavioral questions using the STAR method (Situation, Task, Action, Result).
  5. Research Nextdoor's mission, values, and recent product developments.
  6. Understand the company's tech stack and common architectural patterns.
  7. Practice explaining your thought process clearly and concisely.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice medium LeetCode problems.

Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice implementing these from scratch and analyze their time and space complexity. Solve medium-difficulty problems on LeetCode.

Questions

Commonly asked.

  • Design a system to handle real-time notifications for local events.
  • Given a large dataset of user interactions, how would you identify trending topics in a neighborhood?
  • Explain the trade-offs between different database technologies for storing user profiles.
  • Describe a time you had to deal with a production issue that impacted many users. How did you resolve it?
  • How would you optimize the performance of a frequently accessed API endpoint?
  • What are your thoughts on building features for a community-focused platform?
  • Tell me about a time you mentored a junior engineer.
  • How do you approach code reviews?
  • What is your experience with cloud platforms like AWS, GCP, or Azure?
  • Design a system to manage user-generated content and moderation.

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

San Francisco Bay Area

Interview focus

System design and scalability relevant to local community needs.Experience with technologies commonly used in the region (e.g., specific cloud providers, programming languages).Understanding of user privacy and data security in a community context.

Common questions

  • How would you design a news feed for Nextdoor?
  • Discuss a challenging technical problem you solved at scale.
  • Explain your experience with distributed systems and microservices.
  • How do you approach debugging complex issues in a production environment?
  • Describe a time you had to mentor junior engineers.

Tips

  • Research Nextdoor's presence and impact in the specific region.
  • Be prepared to discuss how your experience aligns with building community-focused features.
  • Highlight any experience with internationalization or localization if applicable.

Rounds

Round-by-round.

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

DSA

Coding questions at Nextdoor.

Frequently reported on Nextdoor loops

View all at Nextdoor

Other guides

More at Nextdoor.