Grubhub

Software Engineer

Software EngineerSoftware Engineer 2Medium to Hard

The Software Engineer 2 interview process at Grubhub is designed to assess a candidate's technical proficiency, problem-solving skills, and cultural fit within the company. It typically involves multiple rounds, starting with an initial HR screening, followed by technical interviews focusing on data structures, algorithms, and system design, and concluding with a behavioral or managerial interview.

Rounds

3

Timeline

~7 days

Experience

2 - 5 yrs

Salary Range

US$110000 - US$150000

Total Duration

150 min

Overall Evaluation Criteria

Technical and Problem-Solving Abilities

Technical Skills (Data Structures, Algorithms, System Design)
Problem-Solving Approach
Coding Proficiency
Communication Skills
Teamwork and Collaboration
Cultural Fit and Alignment with Grubhub Values

Communication and Collaboration

Ability to articulate thought process clearly.
Active listening and responsiveness to interviewer feedback.
Clarity and conciseness in explanations.

Cultural Fit and Motivation

Demonstrated enthusiasm for Grubhub's mission.
Alignment with Grubhub's core values (e.g., customer obsession, innovation, ownership).
Proactiveness and a growth mindset.

Preparation Tips

1Review fundamental data structures and algorithms (arrays, linked lists, trees, graphs, sorting, searching).
2Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
3Study system design principles, including scalability, reliability, and availability.
4Prepare for behavioral questions using the STAR method (Situation, Task, Action, Result).
5Research Grubhub's products, services, and recent news.
6Understand common software development methodologies (Agile, Scrum).
7Be ready to discuss your past projects and technical contributions in detail.

Study Plan

1

Data Structures and Algorithms

Weeks 1-2: Data Structures & Algorithms fundamentals. Practice 2-3 problems daily.

Weeks 1-2: Focus on core data structures (arrays, linked lists, stacks, queues, trees, hash maps) and algorithms (sorting, searching, recursion, dynamic programming). Practice implementing these from scratch and analyze their time and space complexity. Aim for 2-3 coding problems per day.

2

System Design

Weeks 3-4: System Design principles. Study case studies.

Weeks 3-4: Dive into system design concepts. Study topics like API design, database choices (SQL vs. NoSQL), caching strategies, load balancing, message queues, and microservices architecture. Work through common system design case studies.

3

Behavioral and Company Fit

Week 5: Behavioral questions (STAR method) and company research.

Week 5: Prepare for behavioral and situational questions. Reflect on your past experiences and prepare examples using the STAR method for common questions related to teamwork, problem-solving, leadership, and handling conflict. Research Grubhub's values.

4

Mock Interviews and Refinement

Week 6: Mock interviews and practice articulation.

Week 6: Mock interviews. Practice with peers or online platforms to simulate the interview environment. Focus on articulating your thought process clearly and managing your time effectively during coding and design discussions.

Commonly Asked Questions

Given an array of integers, find the contiguous subarray with the largest sum.
Design a URL shortening service like bit.ly.
How would you design a system to handle Grubhub's order processing?
Tell me about a time you disagreed with a teammate and how you resolved it.
What are the trade-offs between using a relational database and a NoSQL database?
Explain the concept of polymorphism with a real-world example.
How would you optimize a slow-running database query?
Describe a project you are particularly proud of and your role in it.
What are your strengths and weaknesses as a software engineer?
How do you stay updated with new technologies?

Location-Based Differences

San Francisco

Interview Focus

System design and scalability for high-volume transactions.Experience with cloud-native technologies (AWS, Kubernetes).Proficiency in distributed systems and microservices architecture.

Common Questions

How would you design a system to handle real-time order updates for Grubhub?

Describe a challenging technical problem you solved and how you approached it.

Explain the trade-offs between different database solutions for a high-traffic e-commerce platform.

Tips

Familiarize yourself with Grubhub's tech stack and recent engineering blog posts.
Be prepared to discuss your experience with large-scale systems and distributed computing.
Highlight any experience with optimizing performance and reducing latency.

Chicago

Interview Focus

Problem-solving and coding efficiency.Understanding of agile methodologies and team collaboration.Experience with data analysis and performance tuning.

Common Questions

How would you optimize the performance of a frequently used API endpoint?

Discuss your experience with A/B testing and its impact on product development.

Describe a time you had to mentor a junior engineer.

Tips

Emphasize your ability to write clean, efficient, and well-tested code.
Be ready to discuss your contributions to team projects and your collaboration style.
Showcase your understanding of the Grubhub product and its user base.

Process Timeline

1
Data Structures and Algorithms45m
2
System Design60m
3
Behavioral and Managerial Fit45m

Interview Rounds

3-step process with detailed breakdown for each round

1

Data Structures and Algorithms

Coding challenge focused on data structures and algorithms.

Technical Interview (Coding)Medium
45 minSoftware Engineer (Peer)

This round focuses on your fundamental programming skills. You will be asked to solve one or two coding problems that test your knowledge of data structures and algorithms. The interviewer will assess your ability to write clean, efficient, and correct code, as well as your approach to problem-solving and your communication skills during the process.

What Interviewers Look For

Solid understanding of data structures and algorithms.Ability to translate a problem into code.Logical thinking and problem-solving skills.

Evaluation Criteria

Correctness of the solution.
Efficiency of the solution (time and space complexity).
Clarity and correctness of the code.
Ability to explain the approach and trade-offs.

Questions Asked

Given a binary tree, invert the tree.

TreeRecursionIteration

Find the kth largest element in an unsorted array.

ArraySortingHeap

Implement a function to check if a string is a palindrome.

StringTwo Pointers

Preparation Tips

1Practice coding problems on platforms like LeetCode, focusing on arrays, strings, linked lists, trees, and graphs.
2Understand time and space complexity analysis (Big O notation).
3Be prepared to explain your thought process step-by-step.
4Write clean, readable, and well-commented code.

Common Reasons for Rejection

Poor communication of thought process.
Inability to solve basic algorithmic problems.
Lack of understanding of fundamental data structures.
2

System Design

Design a scalable system based on a given problem statement.

Technical Interview (System Design)Hard
60 minSenior Software Engineer / Engineering Manager

This round assesses your ability to design and architect 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, or Grubhub's order management system). The interviewer will evaluate your ability to break down the problem, identify requirements, propose solutions, discuss trade-offs, and justify your design choices.

What Interviewers Look For

Ability to design complex systems from scratch.Understanding of distributed systems, databases, caching, and load balancing.Pragmatic approach to trade-offs.Clear communication of design choices.

Evaluation Criteria

System design approach and completeness.
Scalability and performance considerations.
Reliability and fault tolerance.
Choice of technologies and justification.
Handling of edge cases and constraints.

Questions Asked

Design a system to handle real-time notifications for Grubhub orders.

System DesignScalabilityReal-time

Design a rate limiter for an API.

System DesignAPIScalability

Design a distributed cache system.

System DesignDistributed SystemsCaching

Preparation Tips

1Study common system design patterns and principles.
2Practice designing systems like Twitter, Uber, Netflix, etc.
3Understand concepts like CAP theorem, eventual consistency, and database sharding.
4Be prepared to discuss trade-offs between different architectural choices.
5Think about scalability, availability, and reliability.

Common Reasons for Rejection

Inability to design scalable and reliable systems.
Lack of understanding of distributed systems concepts.
Poor consideration of trade-offs and edge cases.
3

Behavioral and Managerial Fit

Assesses behavioral competencies, cultural fit, and motivation.

Behavioral / Managerial InterviewMedium
45 minHiring Manager

This round focuses on your behavioral and cultural fit. The hiring manager will ask questions about your past experiences, how you handle specific situations, your motivations, and your career goals. They want to understand how you work in a team, how you approach challenges, and whether you align with Grubhub's values. Use the STAR method to structure your answers.

What Interviewers Look For

Evidence of collaboration and teamwork.Problem-solving skills in real-world scenarios.Ownership and accountability.Cultural alignment and positive attitude.

Evaluation Criteria

Behavioral competencies (teamwork, problem-solving, leadership).
Alignment with Grubhub's values and culture.
Motivation and career aspirations.
Past experiences and accomplishments.

Questions Asked

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

BehavioralProblem Solving

Describe a situation where you had to work with a difficult colleague. How did you handle it?

BehavioralTeamworkConflict Resolution

Why are you interested in Grubhub?

MotivationCompany Fit

Where do you see yourself in 5 years?

Career GoalsMotivation

Preparation Tips

1Prepare examples for common behavioral questions using the STAR method.
2Research Grubhub's mission, values, and culture.
3Think about why you want to work at Grubhub and for this specific role.
4Be prepared to discuss your strengths, weaknesses, and career goals.
5Ask thoughtful questions about the team, role, and company.

Common Reasons for Rejection

Lack of alignment with company values.
Poor cultural fit.
Inability to articulate past experiences effectively.
Lack of enthusiasm or motivation.

Commonly Asked DSA Questions

Frequently asked coding questions at Grubhub

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