Yelp

Software Engineer

Software EngineerIC2Medium

The Yelp Software Engineer IC2 interview process is designed to assess a candidate's technical skills, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, including HR screening, technical interviews focusing on data structures and algorithms, system design, and behavioral aspects, culminating in a hiring manager interview.

Rounds

4

Timeline

~14 days

Experience

2 - 5 yrs

Salary Range

US$110000 - US$150000

Total Duration

180 min

Overall Evaluation Criteria

Technical Skills

Problem-solving skills
Coding proficiency (clean, efficient, well-tested code)
Data structures and algorithms knowledge
System design and architectural thinking
Communication and collaboration skills
Cultural fit and alignment with Yelp's values

Communication

Ability to articulate thought process
Clarity of explanations
Active listening
Constructive feedback

Behavioral and Cultural Fit

Teamwork and collaboration
Handling conflict
Adaptability
Ownership and accountability

Preparation Tips

1Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal).
2Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
3Study system design concepts, including scalability, availability, databases, caching, load balancing, and API design.
4Prepare for behavioral questions by using the STAR method (Situation, Task, Action, Result) to structure your answers.
5Research Yelp's products, mission, and engineering culture.
6Understand common software development principles like SOLID, DRY, and KISS.
7Prepare questions to ask the interviewer about the role, team, and company.

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms Fundamentals. Practice implementations and basic problems.

Weeks 1-2: Focus on core data structures and algorithms. Cover arrays, linked lists, stacks, queues, trees (binary trees, BSTs, heaps), hash tables, sorting algorithms (quicksort, mergesort), searching algorithms (binary search), and basic graph traversal (BFS, DFS). Practice implementing these and solving problems related to them.

2

Advanced Algorithms

Weeks 3-4: Advanced Algorithms & Problem Solving. Focus on DP, recursion, and medium problems.

Weeks 3-4: Dive into more advanced algorithms and problem-solving techniques. Explore dynamic programming, greedy algorithms, recursion, and backtracking. Work on medium-difficulty problems that require combining multiple concepts. Begin practicing coding on a whiteboard or a shared editor.

3

System Design

Weeks 5-6: System Design Principles. Study scalability, databases, caching, and APIs.

Weeks 5-6: Concentrate on system design. Study concepts like scalability, availability, reliability, databases (SQL vs. NoSQL), caching strategies, load balancing, message queues, and API design. Work through common system design case studies and practice designing systems like Twitter feed, URL shortener, or a distributed cache.

4

Behavioral Preparation

Week 7: Behavioral Interview Prep. Use STAR method and prepare questions.

Week 7: Prepare for behavioral interviews. Reflect on past experiences and prepare stories using the STAR method for common behavioral questions related to teamwork, leadership, conflict resolution, and handling failure. Also, prepare thoughtful questions to ask the interviewer.

5

Mock Interviews and Review

Week 8: Mock Interviews & Review. Practice and refine answers.

Week 8: Mock interviews and review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Review all topics covered, focusing on areas where you feel less confident. Ensure you can clearly articulate your thought process for both coding and system design problems.

Commonly Asked Questions

Given an array of integers, find the contiguous subarray with the largest sum.
Design a system to store and retrieve user profiles.
How would you implement a rate limiter?
Tell me about a time you had to deal with a difficult stakeholder.
What are the trade-offs between SQL and NoSQL databases?
Write a function to reverse a linked list.
Describe your experience with cloud platforms like AWS or GCP.
How do you approach debugging a complex issue?
What is your understanding of RESTful APIs?
Tell me about a project you are particularly proud of.

Location-Based Differences

San Francisco

Interview Focus

Emphasis on practical application of data structures and algorithms.Understanding of distributed systems and scalability.Collaboration and communication skills.

Common Questions

How would you design a URL shortener like bit.ly?

Discuss a challenging technical problem you solved recently.

Tell me about a time you disagreed with a teammate and how you resolved it.

Tips

Be prepared to whiteboard solutions for common coding problems.
Familiarize yourself with Yelp's tech stack and products.
Practice explaining your thought process clearly.

New York

Interview Focus

Strong focus on system design and architectural patterns.Ability to handle ambiguity and make trade-offs.Demonstrated ownership and impact.

Common Questions

Design an API for a restaurant review system.

How would you optimize a database query for a large dataset?

Describe a situation where you had to adapt to a significant change at work.

Tips

Prepare to discuss trade-offs in system design choices.
Highlight projects where you took initiative and drove results.
Research Yelp's engineering blog for insights into their challenges.

Process Timeline

1
Recruiter Call30m
2
Technical Coding Interview45m
3
System Design Interview60m
4
Hiring Manager Interview45m

Interview Rounds

4-step process with detailed breakdown for each round

1

Recruiter Call

HR screen to assess cultural fit and basic qualifications.

HR ScreenEasy
30 minRecruiter/HR

This initial round is conducted by an HR representative or recruiter to assess your overall fit with Yelp's culture and values. They will ask about your background, career goals, and motivation for applying. It's also an opportunity for you to learn more about the company and the role. Be prepared to discuss your resume and why you're interested in Yelp.

What Interviewers Look For

Clear communicationEnthusiasm for the roleBasic understanding of software development concepts

Evaluation Criteria

Basic coding ability
Communication skills
Cultural fit

Questions Asked

Tell me about yourself.

Behavioral

Why are you interested in Yelp?

BehavioralMotivation

What are your strengths and weaknesses?

Behavioral

What are your salary expectations?

Compensation

Preparation Tips

1Research Yelp's mission, values, and recent news.
2Prepare to talk about your resume and career aspirations.
3Practice answering common behavioral questions.
4Prepare questions to ask the interviewer.

Common Reasons for Rejection

Lack of basic coding proficiency.
Inability to explain thought process.
Poor understanding of fundamental data structures.
2

Technical Coding Interview

Coding challenge focused on data structures and algorithms.

Technical Interview (Data Structures & Algorithms)Medium
45 minSoftware Engineer

This is a technical interview focused on data structures and algorithms. You will be asked to solve one or two coding problems, typically on a whiteboard or a shared online editor. The interviewer will assess your ability to choose appropriate data structures, design efficient algorithms, write clean code, and analyze the time and space complexity of your solution. Be prepared to discuss trade-offs and edge cases.

What Interviewers Look For

Correctness of the solutionEfficiency of the solutionClean and readable codeAbility to explain the thought processHandling of edge cases

Evaluation Criteria

Data structures knowledge
Algorithm design
Coding proficiency
Problem-solving approach
Time and space complexity analysis

Questions Asked

Given a binary tree, find its inorder traversal.

Data StructuresTreesRecursion

Implement a function to find the kth smallest element in an unsorted array.

AlgorithmsSortingQuickselect

Given two strings, find the longest common subsequence.

AlgorithmsDynamic Programming

Preparation Tips

1Practice coding problems on platforms like LeetCode (focus on Easy/Medium).
2Review common data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, BFS, DFS).
3Practice explaining your thought process out loud while coding.
4Be ready to discuss time and space complexity (Big O notation).

Common Reasons for Rejection

Inability to solve coding problems efficiently.
Code is not clean or well-structured.
Poor time complexity analysis.
Difficulty explaining the solution.
3

System Design Interview

Design a scalable system and discuss trade-offs.

System Design InterviewMedium
60 minSenior Software Engineer / Architect

This round focuses on your ability to design scalable and robust software systems. You'll be given an open-ended problem, such as designing a specific feature or a large-scale system (e.g., a URL shortener, a social media feed). The interviewer will assess your understanding of distributed systems, databases, caching, load balancing, and your ability to make reasoned trade-offs. Be prepared to draw diagrams and explain your design choices.

What Interviewers Look For

Ability to design scalable and reliable systems.Understanding of distributed systems concepts.Clear communication of design choices.Consideration of various components (databases, caching, load balancers).Ability to handle ambiguity and constraints.

Evaluation Criteria

System design principles
Scalability and performance
Trade-off analysis
Database knowledge
API design
Distributed systems concepts

Questions Asked

Design a URL shortening service like bit.ly.

System DesignScalabilityDatabases

Design the Twitter feed system.

System DesignScalabilityAPIsDatabases

How would you design a system to handle real-time notifications?

System DesignReal-timeWebSockets

Preparation Tips

1Study system design concepts: scalability, availability, consistency, databases (SQL/NoSQL), caching, load balancing, message queues, CDNs.
2Review common system design interview questions and case studies.
3Practice designing systems on paper or a whiteboard.
4Think about potential bottlenecks and failure points in your designs.

Common Reasons for Rejection

Lack of understanding of system design principles.
Inability to handle scale or distributed systems.
Poor trade-off analysis.
Not considering edge cases or failure scenarios.
4

Hiring Manager Interview

Behavioral questions and discussion about your experience and career goals.

Behavioral And Managerial InterviewMedium
45 minHiring Manager

The hiring manager interview focuses on your past experiences, how you approach work, and your potential to contribute to the team. You'll be asked behavioral questions to understand your problem-solving skills, teamwork, leadership potential, and how you handle challenges. This is also your chance to ask in-depth questions about the team's projects, challenges, and the role's responsibilities.

What Interviewers Look For

Evidence of teamwork and collaboration.Ability to handle challenging situations.Ownership and accountability for work.Growth mindset.Alignment with Yelp's culture.

Evaluation Criteria

Behavioral competencies
Teamwork and collaboration
Problem-solving approach in past projects
Adaptability and learning
Alignment with Yelp's values

Questions Asked

Tell me about a time you faced a significant technical challenge and how you overcame it.

BehavioralProblem Solving

Describe a situation where you had to work with a difficult team member.

BehavioralTeamworkConflict Resolution

How do you prioritize your work when faced with multiple tasks?

BehavioralTime Management

What are you looking for in your next role?

BehavioralMotivation

Preparation Tips

1Prepare specific examples using the STAR method for behavioral questions.
2Reflect on your past projects and your role in them.
3Think about your career goals and how this role aligns with them.
4Prepare thoughtful questions for the hiring manager.

Common Reasons for Rejection

Poor communication or collaboration skills.
Lack of ownership or initiative.
Negative attitude.
Mismatch with team dynamics or company culture.

Commonly Asked DSA Questions

Frequently asked coding questions at Yelp

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Two SumEASYLongest Substring Without Repeating CharactersMEDIUMLongest Common PrefixEASYGroup AnagramsMEDIUMMerge IntervalsMEDIUMWord Ladder IIHARDWord LadderHARDReverse Words in a StringMEDIUMReverse Linked ListEASYCourse ScheduleMEDIUM