This interview process is designed to assess candidates for the Software Engineer (SDE 2) role at Groupon. It evaluates technical proficiency, problem-solving skills, system design capabilities, and cultural fit.
Rounds·3
Timeline·~7d
Experience·3 - 7 yrs
Comp band·US$120000 - US$150000
Interview time·150 min
Evaluation
What they measure.
Problem-solving ability
Algorithmic thinking
Data structure knowledge
Code quality and efficiency
Debugging skills
System design and architecture
Scalability and performance considerations
Understanding of distributed systems
Trade-off analysis
Communication clarity
Collaboration and teamwork
Adaptability and learning agility
Ownership and accountability
Cultural alignment with Groupon values
Preparation
How to prepare.
Tips
01Review fundamental data structures and algorithms (arrays, linked lists, trees, graphs, hash maps, heaps).
02Practice coding problems focusing on time and space complexity.
03Study common system design patterns and principles (e.g., load balancing, caching, database sharding, microservices).
04Prepare to discuss your past projects in detail, focusing on your contributions and technical challenges.
05Understand core computer science concepts like operating systems, databases, and networking.
06Research Groupon's products, services, and company culture.
07Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
Study plan
Fig · Study plan — 04 phases
01 / 04
01
Phase 01 of 04
Data Structures and Algorithms
Weeks 1-2: Data Structures & Algorithms. Practice coding problems.
Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, stacks, queues, trees (binary, BST, AVL), heaps, hash tables, graphs. Practice problems related to searching, sorting, recursion, dynamic programming, and graph traversal. Aim for 2-3 hours of study and practice daily.
02
Phase 02 of 04
System Design
Weeks 3-4: System Design. Study scalability and architecture.
Weeks 3-4: Dive into System Design. Study concepts like scalability, availability, reliability, load balancing, caching strategies, database design (SQL vs. NoSQL, sharding, replication), message queues, and API design. Work through common system design case studies. Aim for 2-3 hours of study and practice daily.
03
Phase 03 of 04
Behavioral and Behavioral Questions
Week 5: Behavioral Prep. Use STAR method.
Week 5: Behavioral and Behavioral Questions. Prepare for questions about teamwork, leadership, conflict resolution, and handling failure. Use the STAR method to structure your answers. Reflect on your past projects and identify key achievements and learnings. Aim for 1-2 hours of preparation daily.
04
Phase 04 of 04
Mock Interviews and Final Review
Week 6: Mock Interviews & Review. Practice weak areas.
Week 6: Mock Interviews and Review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Review weak areas identified during practice and mock interviews. Familiarize yourself with Groupon's specific technologies and business domain. Aim for 2-3 hours of practice daily.
Questions
Commonly asked.
Design a rate limiter.
Implement a Least Recently Used (LRU) cache.
How would you design a distributed key-value store?
Explain the CAP theorem and its implications.
Describe a time you disagreed with a teammate and how you resolved it.
What are the trade-offs between monolithic and microservices architectures?
How do you optimize database performance?
Tell me about a time you failed and what you learned from it.
Design a system to handle real-time analytics for a website.
What is idempotency and why is it important in distributed systems?
Locations
Regional differences.
Fig · Regions — 03 locations
01 / 03
Location
San Francisco
Interview focus
System design and scalability are often emphasized.Experience with distributed systems and microservices architecture.Proficiency in specific technologies relevant to the local engineering teams (e.g., Java, Python, Go).
Common questions
How would you design a URL shortener service?
Discuss a challenging technical problem you solved recently.
Explain the trade-offs between SQL and NoSQL databases.
How do you ensure scalability and reliability in your applications?
Describe your experience with cloud platforms like AWS or Azure.
Tips
Research the specific tech stack used by the Groupon office in this location.
Be prepared to discuss large-scale system design challenges.
Highlight any experience with A/B testing or experimentation frameworks.
Location
Chicago
Interview focus
Core data structures and algorithms.Object-oriented design principles.Code quality and best practices.Problem-solving and analytical skills.
Common questions
How would you design a real-time notification system?
Describe your approach to writing clean, maintainable code.
What are the principles of object-oriented programming?
How do you handle concurrency and multithreading?
Tell me about a time you had to mentor a junior engineer.
Tips
Brush up on fundamental computer science concepts.
Practice coding problems on platforms like LeetCode or HackerRank.
Be ready to explain your thought process clearly during coding exercises.
Location
New York
Interview focus
Agile methodologies and team collaboration.API design and best practices.Debugging and troubleshooting skills.Understanding of the e-commerce domain.
Common questions
How would you design an e-commerce checkout system?
Discuss your experience with agile development methodologies.
What are the key considerations for building a robust API?
How do you approach debugging complex issues?
Tell me about a project where you had to collaborate with cross-functional teams.
Tips
Familiarize yourself with Groupon's business model and products.
Highlight your experience in fast-paced, collaborative environments.
Be prepared to discuss your contributions to team success.
Rounds
Round-by-round.
Expand a step for evaluation criteria, sample questions, and prep notes.
Med
Data Structures And Algorithms · 45 min · Software Engineer
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 analyze the problem, devise an efficient solution, write clean code, and explain your reasoning. Expect questions on arrays, strings, linked lists, trees, graphs, hash maps, and algorithmic techniques like recursion, dynamic programming, and greedy algorithms.
What they look for
A systematic approach to problem-solving.Proficiency in common data structures and algorithms.Ability to write clean, efficient, and bug-free code.Clear communication of thought process.
Evaluation
Correctness of the solution
Efficiency (time and space complexity)
Code readability and maintainability
Problem-solving approach
Sample questions
Given an array of integers, return indices of the two numbers such that they add up to a specific target.
ArrayHash TableTwo Pointers
Reverse a linked list.
Linked ListRecursionIteration
Find the kth smallest element in a Binary Search Tree.
TreeBinary Search TreeIn-order Traversal
Prep for this round
01Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte.
02Focus on understanding the time and space complexity of your solutions.
03Be prepared to explain your approach and justify your choices.
04Practice writing code on a whiteboard or in a shared editor without an IDE's help.
Common rejection reasons
×Inability to articulate thought process clearly.
×Suboptimal algorithmic solutions.
×Poor code quality (e.g., lack of comments, poor variable naming).
×Failure to consider edge cases and constraints.
Hard
System Design · 60 min · Senior Software Engineer / Engineering Manager
This round assesses your ability to design and architect software systems. You will be presented with a high-level problem (e.g., design a URL shortener, a social media feed, or an e-commerce platform) and expected to design a scalable, reliable, and maintainable solution. The interviewer will probe into your design choices, discuss trade-offs, and explore potential bottlenecks and solutions. Expect to cover aspects like API design, data storage, caching, load balancing, and fault tolerance.
What they look for
Ability to design complex, scalable systems.Understanding of distributed systems concepts.Knowledge of various architectural patterns.Ability to articulate design choices and justify trade-offs.
Evaluation
System design approach
Scalability and performance
Reliability and availability
Trade-off analysis
Component design
Sample questions
Design a system like Twitter's news feed.
System DesignScalabilityDistributed SystemsDatabases
Design a distributed cache.
System DesignCachingDistributed SystemsNetworking
How would you design an API for a ride-sharing service?
System DesignAPI DesignMicroservices
Prep for this round
01Study common system design patterns and principles.
02Practice designing various types of systems (e.g., web crawlers, notification systems, chat applications).
03Familiarize yourself with distributed systems concepts.
04Be prepared to draw diagrams and explain your design clearly.
05Think about scalability, availability, and performance from the outset.
Common rejection reasons
×Lack of clarity in system design.
×Failure to consider scalability and performance bottlenecks.
×Inability to discuss trade-offs effectively.
×Not addressing key components of the system.
Med
Behavioral Interview · 45 min · Hiring Manager
This round focuses on your behavioral and situational responses. The interviewer will ask questions about your past experiences, how you handle specific work scenarios, and your motivations. The goal is to understand your work style, how you collaborate with others, how you approach challenges, and whether you align with Groupon's culture and values. Be prepared to share specific examples using the STAR method.
What they look for
Evidence of teamwork and collaboration.Ability to handle challenging situations and learn from mistakes.Motivation and passion for the role and company.Alignment with Groupon's values.Clear and concise communication.
Evaluation
Communication skills
Teamwork and collaboration
Problem-solving approach
Adaptability and learning
Cultural alignment
Sample questions
Tell me about a time you had to work with a difficult colleague.
BehavioralTeamworkConflict Resolution
Describe a project where you faced a significant technical challenge and how you overcame it.
BehavioralProblem SolvingTechnical Challenge
Why are you interested in working at Groupon?
BehavioralMotivationCompany Fit
Tell me about a time you failed. What did you learn?
BehavioralLearningResilience
Prep for this round
01Prepare examples for common behavioral questions (e.g., teamwork, conflict resolution, leadership, failure).
02Use the STAR method (Situation, Task, Action, Result) to structure your answers.
03Research Groupon's company values and culture.
04Be enthusiastic and genuine in your responses.
05Ask thoughtful questions about the team, role, and company.
Common rejection reasons
×Poor communication skills.
×Lack of self-awareness.
×Negative attitude or lack of enthusiasm.
×Inability to provide specific examples.
×Poor cultural fit or misalignment with company values.