Scale Engineer

Software Engineer

Software EngineerL2Medium

The Software Engineer L2 interview at Stripe is designed to assess a candidate's foundational software engineering skills, problem-solving abilities, and cultural fit within the company. It typically involves a mix of technical challenges, system design discussions, and behavioral questions to evaluate a candidate's potential to contribute effectively to Stripe's engineering teams.

Rounds·3

Timeline·~14d

Experience·2 - 5 yrs

Comp band·US$110000 - US$150000

Interview time·150 min

Evaluation

What they measure.

  • Problem-solving approach
  • Algorithmic thinking
  • Data structure knowledge
  • Coding proficiency (clarity, efficiency, correctness)
  • Ability to handle edge cases

Preparation

How to prepare.

Tips

  1. Master fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal).
  2. Practice coding problems on platforms like LeetCode, HackerRank, or AlgoExpert, focusing on medium-difficulty problems.
  3. Review system design concepts, including databases, caching, load balancing, message queues, and distributed systems.
  4. Prepare to discuss your past projects in detail, highlighting your contributions and the technical challenges you faced.
  5. Understand Stripe's business, products, and engineering culture. Read their engineering blog.
  6. Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
  7. Be ready to explain your thought process clearly and concisely during technical discussions.

Study plan

Fig · Study plan — 04 phases

01 / 04
01

Phase 01 of 04

Data Structures and Algorithms Fundamentals

Weeks 1-2: Data Structures & Basic Algorithms. LeetCode Easy/Medium.

Weeks 1-2: Focus on core data structures (arrays, linked lists, stacks, queues, hash maps) and basic algorithms (sorting, searching). Practice implementing these from scratch and analyze their time/space complexity. Solve 10-15 LeetCode Easy/Medium problems related to these topics.

Questions

Commonly asked.

  • Given an array of integers, find the contiguous subarray with the largest sum.
  • Design a system to count the number of unique visitors to a website.
  • Explain the concept of recursion with an example.
  • How would you implement a Least Recently Used (LRU) cache?
  • Tell me about a time you had to deal with a difficult stakeholder.
  • What are the differences between TCP and UDP?
  • How would you design a rate limiter for an API?
  • Describe your experience with version control systems like Git.
  • What are some common security vulnerabilities in web applications and how do you prevent them?
  • Tell me about a project you are particularly proud of.

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

San Francisco

Interview focus

Emphasis on practical coding skills and understanding of core computer science concepts.Assessment of ability to write clean, maintainable, and efficient code.Evaluation of problem-solving approach and ability to break down complex problems.

Common questions

  • How would you design a URL shortener service?
  • Explain the difference between a process and a thread.
  • Describe a challenging technical problem you solved and how you approached it.
  • How do you handle concurrency in your code?
  • What are your thoughts on testing and code quality?

Tips

  • Be prepared to write code on a whiteboard or shared editor.
  • Clearly articulate your thought process when solving problems.
  • Ask clarifying questions to ensure you understand the problem completely.
  • Demonstrate a solid understanding of data structures and algorithms.
  • Be ready to discuss your past projects and contributions in detail.

Rounds

Round-by-round.

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

Med

Technical Interview (Coding) · 45 min · Software Engineer

This round focuses on your ability to solve coding problems. You will be given one or two algorithmic problems and asked to write code to solve them, typically on a whiteboard or a shared online editor. The interviewer will assess your problem-solving approach, your knowledge of data structures and algorithms, and your ability to write clean, efficient, and correct code. They will also evaluate your communication skills as you explain your thought process.

What they look for

A candidate who can translate a problem into working code.Someone who can articulate their approach and reasoning.An individual who considers efficiency and edge cases.A candidate who can write clean and readable code.

Evaluation

  • Problem-solving ability
  • Coding proficiency
  • Algorithmic knowledge
  • Data structure knowledge
  • Communication

Sample questions

  • Given a binary tree, find its inorder traversal.

    Data StructuresAlgorithmsTree Traversal

  • Implement a function to reverse a linked list.

    Data StructuresLinked ListsAlgorithms

  • Find the kth smallest element in a sorted matrix.

    AlgorithmsMatrixSorting

Prep for this round

  1. 01Practice coding on a whiteboard or in a plain text editor.
  2. 02Focus on explaining your thought process clearly.
  3. 03Be prepared to discuss time and space complexity.
  4. 04Ask clarifying questions about the problem statement.
  5. 05Consider edge cases and how to handle them.

Common rejection reasons

  • ×Inability to solve coding problems efficiently.
  • ×Poor understanding of fundamental data structures and algorithms.
  • ×Lack of clear communication of thought process.
  • ×Failure to consider edge cases.

DSA

Coding questions at Stripe.

Frequently reported on Stripe loops

View all at Stripe

Other guides

More at Stripe.