Expedia Group Software Engineer interview questions & guide 2026

Interview questions for Software Engineer candidates are derived from real reported interview experiences across global tech hubs like Seattle, Austin, London, and Gurgaon. While specific questions depend on team alignment and level, candidates face consistent algorithmic patterns, object-oriented concepts, and system design challenges.

Coding & Data Structures

This category evaluates algorithmic fluency, edge-case handling, and optimal time/space complexity using platforms like HackerRank and CoderPad.

• Given an array of interval time pairs [start, end], merge all overlapping intervals and return the combined list.
• Find the length of the longest substring without repeating characters in a given string.

Preparing for an interview at Expedia Group requires balancing data structure mechanics with clean coding practices, object-oriented modularity, and behavioral principles.

Role-related knowledge – Demonstrating strong fundamentals in data structures, algorithms, and modular software architecture is critical. Interviewers expect clear runtime analysis ($O(N)$ space and time complexity) and clean code using standard design patterns.

Problem-solving ability – You must talk through your thought process out loud before writing code. Clearly explain your approach, analyze edge cases upfront, and explain how you validate your solution using test cases.

System & Object Design – Demonstrating strong structural design skills means thinking beyond core logic to evaluate extensibility, concurrency, and thread safety in low-level rounds, while balancing throughput, database choices, and trade-offs in high-level architectural rounds.

Culture fit & Expedia Group Behaviors – Candidate performance is heavily weighed against internal behavioral principles. Frame your past engineering experiences around core values like Traveler First, Go Viva, and Succeed Together using the structured STAR method (Situation, Task, Action, Result).

The interview pipeline for a Software Engineer at Expedia Group tests technical depth, operational judgment, and behavioral alignment. The process generally consists of an online assessment followed by a virtual onsite loop.

Candidates typically begin with an automated screening phase, followed by direct technical and behavioral engagements with software engineers, technical managers, and engineering leaders.

The process relies on strong-positive signal gating: clear performance in initial technical screens ensures progression into multi-part onsite loops. Onsite interviewers evaluate your performance holistically across DSA, system design, object-oriented concepts, and cultural alignment.

The timeline above reflects the typical interview progression from initial online screening through final hiring manager loops. Candidates should plan for 2–4 weeks from initial screening to offer decision, reserving dedicated time to review algorithms, system design patterns, and STAR behavioral answers.

Data Structures & Algorithms (DSA)

Algorithmic rounds test clean code implementation, core computing logic, and rigorous time-space efficiency analysis.

Be ready to go over:

• Arrays, Strings & Sliding Window – Substring matching, two-pointer techniques, and variable/fixed sliding windows.
• Graph & Tree Traversals – Cycle detection, BFS/DFS applications, binary tree transformations, and matrix pathfinding.

As a Software Engineer at Expedia Group, you will spend your time building and scaling core infrastructure, traveler services, and backend platforms.

• Design & Execution: Architect, write, test, and maintain high-quality backend or full-stack software components supporting high-throughput global travel features.
• Cross-Functional Collaboration: Partner with product managers, UX designers, site reliability engineers (SRE), and principal architects to define specifications and deliver end-to-end features.
• System Maintenance & Operational Excellence: Participate in operational support, resolve code-level bugs, monitor service metrics, optimize low-latency APIs, and contribute to system architecture reviews.
• Code Quality & Technical Standards: Review pull requests, author design documents, and apply clean code principles to maintain high platform health.

Candidates applying for Software Engineer roles at Expedia Group are expected to demonstrate strong software fundamentals and real-world implementation capabilities.

Must-have skills:

• Strong foundations in computer science core principles: Data Structures, Algorithms, Object-Oriented Programming, and Software Design.
• Proficiency in at least one modern object-oriented or functional language (e.g., Java, Kotlin, C++, Python, or Go).
• Practical experience designing, building, and consuming secure RESTful or GraphQL Web APIs.
• Understanding of database systems, including relational engines (e.g., PostgreSQL, MySQL) and query execution basics.
• Strong verbal and written communication skills to articulate technical trade-offs during architectural discussions.

Nice-to-have skills:

• Hands-on experience with cloud platforms (AWS, Azure, GCP) and container orchestration tools like Kubernetes.
• Experience with high-throughput streaming and queuing systems (e.g., Kafka, RabbitMQ).
• Knowledge of distributed caching technologies like Redis, Memcached, or Hazelcast.
• Understanding of dynamic UI frameworks (React, TypeScript) for candidates targeting full-stack or web-focused teams.

Q: What programming languages am I allowed to use in the coding rounds? You may write your solutions in common mainstream programming languages like Java, C++, Python, Kotlin, or Go. Unless explicitly applying for a specific stack (e.g., Android Kotlin or Frontend React), interviewers care most about core problem-solving, clean logic, and time/space complexity analysis.

Q: How difficult are the technical interviews compared to other major tech companies? The technical bar is competitive, generally featuring Easy-to-Medium and select Medium-Hard algorithmic questions. Low-level design (LLD) and behavioral rounds hold significant weight, so writing clean code and demonstrating strong architectural principles is critical to passing.

Q: What is the single most common mistake candidates make in this process? Jumping into writing code without first clarifying requirements or discussing edge cases. Interviewers want to see how you analyze constraints, structure your approach out loud, and execute clean, tested code.

Q: How long does the hiring process take from start to finish? The end-to-end timeline typically takes between 2 to 4 weeks. After completing the final loop, candidates generally receive post-interview updates or offer decisions within 5 to 10 business days.

• Prioritize Clean Code in LLD: In low-level design rounds, avoid writing monolithic functions or messy code. Create clear interfaces, enforce encapsulation, and demonstrate standard OOP design patterns (such as Factory, Strategy, or Observer).
• Study Core Behavioral Values: Review official Expedia Group behaviors, especially Traveler First and Succeed Together. Prepare 4–5 versatile STAR stories that highlight your teamwork, problem-solving, and adaptability.
• Be Prepared for Follow-Up Constraints: Interviewers often add new requirements mid-interview (e.g., handling thread safety or changing memory limits). Stay adaptable and adjust your logic systematically.
• Trace Your Code Explicitly: After completing your code implementation on CoderPad or HackerRank, walk through a concrete test case line-by-line to verify loop conditions, boundary limits, and edge cases.

A Software Engineer role at Expedia Group offers the chance to build microservices and platforms that power global travel for millions of users. Succeeding in the interview loop requires a solid grasp of core data structures, object-oriented design, distributed system principles, and cultural alignment.

To stand out, focus your preparation on core DSA algorithms (strings, arrays, sliding window, dynamic programming, and graphs), practice building modular low-level designs, and refine your STAR behavioral responses. Explaining your thought process clearly throughout the interview will showcase your engineering strength.

The compensation module above outlines current market compensation trends for Software Engineer roles at Expedia Group. Exact offer packages vary based on candidate level (e.g., SDE I, SDE II, SDE III), location cost-of-living adjustments, and target specialization areas.

Candidates can explore additional interview insights, practice questions, and preparation resources on Dataford. Dedicating focused preparation time to core algorithms, design principles, and behavioral scenarios will help you show up with confidence during your Expedia Group interview loop.