Scale Engineer

Software Engineer

Software EngineerL4Medium to Hard

The Software Engineer L4 interview at Wish is designed to assess a candidate's technical proficiency, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, including technical assessments, behavioral questions, and system design challenges, to ensure the candidate can contribute effectively to Wish's engineering goals.

Rounds·3

Timeline·~14d

Experience·3 - 7 yrs

Comp band·US$120000 - US$160000

Interview time·150 min

Evaluation

What they measure.

  • Problem-solving approach and analytical skills.
  • Technical depth and breadth of knowledge.
  • Coding proficiency and best practices.
  • System design and architectural thinking.
  • Communication and collaboration skills.
  • Cultural fit and alignment with Wish values.

Preparation

How to prepare.

Tips

  1. Review fundamental data structures and algorithms (arrays, linked lists, trees, graphs, hash maps, sorting, searching).
  2. Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium to hard difficulty.
  3. Study system design principles, including scalability, reliability, availability, and performance.
  4. Prepare for behavioral questions by using the STAR method (Situation, Task, Action, Result) to structure your answers.
  5. Research Wish's products, mission, and recent news to understand the company's context.
  6. Understand common software engineering best practices, such as SOLID principles, design patterns, and testing methodologies.
  7. Be prepared to discuss your past projects in detail, highlighting your contributions and the technical challenges you faced.

Study plan

Fig · Study plan — 07 phases

01 / 07
01

Phase 01 of 07

Data Structures and Algorithms Fundamentals

Weeks 1-2: Data Structures & Basic Algorithms. Practice 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 and space complexity. Solve 10-15 LeetCode Easy and 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 shorten URLs.
  • Tell me about a time you disagreed with a teammate. How did you handle it?
  • Implement a function to reverse a linked list.
  • How would you design a news feed for a social media platform?
  • Describe a challenging bug you encountered and how you debugged it.
  • What are the differences between SQL and NoSQL databases?
  • Explain the concept of concurrency and how you would handle it in a multi-threaded application.
  • How would you optimize the performance of a web application?
  • Tell me about a project you are particularly proud of.

Locations

Regional differences.

Fig · Regions — 03 locations

01 / 03

Location

San Francisco

Interview focus

Understanding of distributed systems and scalability challenges specific to e-commerce.Experience with cloud platforms (AWS, GCP) and their services.Ability to articulate technical decisions and their impact on business metrics.

Common questions

  • How would you optimize a database query for a large e-commerce platform?
  • Describe a time you had to deal with a production issue. What was your approach?
  • Explain the trade-offs between microservices and a monolithic architecture in the context of Wish's scale.

Tips

  • Research Wish's tech stack and recent engineering blog posts.
  • Be prepared to discuss your experience with large-scale data processing and real-time systems.
  • Highlight any contributions to open-source projects or significant personal projects.

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 assessing your fundamental coding skills and problem-solving abilities. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will evaluate your approach to solving the problem, your ability to write clean and efficient code, and your understanding of time and space complexity.

What they look for

Ability to translate a problem into working code.Understanding of fundamental data structures and algorithms.Clean and maintainable code.

Evaluation

  • Correctness of the solution.
  • Efficiency of the solution (time and space complexity).
  • Code quality and readability.
  • Problem-solving approach.

Sample questions

  • Given an array of integers, find the contiguous subarray with the largest sum.

    ArrayDynamic Programming

  • Implement a function to reverse a linked list.

    Linked ListPointers

  • Find the kth smallest element in a sorted matrix.

    MatrixBinary Search

Prep for this round

  1. 01Practice coding problems on platforms like LeetCode.
  2. 02Focus on understanding the underlying data structures and algorithms.
  3. 03Write clean, well-commented code.
  4. 04Be prepared to explain your thought process and the complexity of your solution.

Common rejection reasons

  • ×Inability to articulate thought process.
  • ×Poor coding practices (e.g., no error handling, unreadable code).
  • ×Incorrect or inefficient solutions to coding problems.

DSA

Coding questions at Wish.

Frequently reported on Wish loops

View all at Wish

Other guides

More at Wish.