Expedia Group Backend Engineer interview questions & guide 2026

Our interview process is designed to evaluate your technical depth, problem-solving methodology, and ability to communicate complex ideas. The following questions are representative of the patterns you will encounter; use these as a framework for your preparation rather than a list for memorization.

Technical Coding & Algorithms

These questions test your proficiency in data structures and your ability to write clean, efficient, and maintainable code under pressure.

• Given a large stream of data, how would you design a service to filter and aggregate specific travel parameters in real-time?
• Implement a function to handle concurrent booking requests while ensuring data consistency.

Success at Expedia Group requires a balance of rigorous technical preparation and a clear understanding of how your work fits into the broader business ecosystem. Focus your preparation on demonstrating both your coding fluency and your architectural intuition.

Role-related knowledge – You must be comfortable with the core technologies that power distributed systems. Interviewers look for deep understanding of database design, API design patterns, and concurrency control. Be prepared to discuss why you chose a specific technology or pattern over an alternative.

Problem-solving ability – We value engineers who think before they code. When presented with a problem, clarify your assumptions, discuss potential edge cases, and articulate your trade-offs clearly. It is often better to arrive at a solid, well-explained solution than to rush into an incomplete, unoptimized one.

Leadership and collaboration – Even in a backend role, your ability to communicate complex technical concepts to non-technical stakeholders is vital. You should be ready to talk about how you influence team direction, mentor peers, and resolve technical conflicts through consensus and data.

The interview process at Expedia Group is structured to be thorough, fair, and transparent. We move through stages that assess your fundamental engineering skills before diving into your ability to design systems and operate within a team. We emphasize technical accuracy, but we also place significant value on your cultural alignment and your ability to work within a highly collaborative, global environment.

This visual timeline illustrates the typical progression from initial screening to technical deep dives and final behavioral rounds. Use this to pace your preparation, ensuring you have enough time to review both your coding fundamentals and your past project experiences. Note that while the core process is consistent, specific team needs may occasionally introduce variations in the number or focus of technical rounds.

Distributed Systems Design

This is a cornerstone of the Backend Engineer role. We evaluate your ability to design systems that are scalable, reliable, and maintainable. A strong performance involves demonstrating a deep understanding of load balancing, database sharding, and service-to-service communication.

Be ready to go over:

• Caching strategies – When and where to implement caches to optimize latency.
• Microservices patterns – Understanding how to manage service boundaries and inter-service communication.
• Consistency models – The trade-offs between strong and eventual consistency in a global travel platform.
• Advanced concepts – Circuit breakers, service discovery, and message queues.

Example scenarios:

• "Design a service that provides real-time pricing for flights across the globe."
• "How would you handle a massive traffic spike during a major holiday?"

Algorithmic Proficiency

We assess your ability to solve problems efficiently. We are less interested in "trick" questions and more interested in your ability to write clean, production-ready code that handles edge cases effectively.

Be ready to go over:

• Data structures – Hash maps, trees, graphs, and their application to real-world search problems.
• Complexity analysis – Being able to articulate the time and space complexity of your solutions.
• Code quality – Writing readable, testable, and modular code.

Example scenarios:

• "Given a set of booking logs, find the most frequent travel patterns."
• "Implement an efficient search algorithm for a large, sorted dataset."

As a Backend Engineer, your day-to-day will involve designing and implementing robust backend services that support our travel products. You will work closely with other engineers, product managers, and data scientists to move from feature requirements to scalable implementation.

You will be expected to:

• Write high-quality, maintainable code for core backend services.
• Participate in code reviews to ensure consistency and quality across the codebase.
• Troubleshoot production issues and contribute to the ongoing stability of our infrastructure.
• Collaborate with cross-functional teams to define APIs and service contracts that enable seamless integration.
• Proactively identify and address technical debt to ensure long-term system health.

We look for candidates who combine technical depth with a pragmatic approach to software development. You should be comfortable working in a fast-paced environment and capable of taking ownership of complex components.

• Must-have skills: Proficient in at least one modern language (e.g., Java, Kotlin, Go, or Python), strong understanding of relational databases, and experience with RESTful API design.
• Nice-to-have skills: Experience with cloud-native technologies (AWS/Azure/GCP), familiarity with containerization (Docker/Kubernetes), and knowledge of event-driven architectures.
• Experience level: We typically look for candidates who have a solid track record of delivering production-grade services and contributing to large-scale, distributed systems.

Q: How much time should I spend preparing for the coding portion? A: Dedicate enough time to become comfortable with common data structures and algorithms, focusing on medium-difficulty problems that require logical structuring. Consistency over several weeks is more effective than last-minute cramming.

Q: What is the company culture like for engineers? A: Expedia Group values collaboration, data-driven decision-making, and a customer-first mindset. You will find an environment where engineers are encouraged to innovate and take ownership of their work.

Q: How long does the hiring process usually take? A: While timelines can vary based on the team and current hiring volume, we aim to move candidates through the process efficiently. Expect frequent communication from your recruiter throughout the stages.

Q: Are there remote work opportunities? A: We embrace a hybrid and flexible work culture, though specific requirements can depend on the team and the office location. Discuss this early with your recruiter.

• Structure your answers: Use the STAR method (Situation, Task, Action, Result) for behavioral questions to keep your responses concise and impactful.
• Ask clarifying questions: Never jump into a problem without confirming your understanding of the requirements. This shows you are a thoughtful engineer.
• Embrace feedback: If an interviewer provides a hint or suggests a different approach, incorporate it into your thinking immediately. This demonstrates coachability.
• Focus on the "why": Always explain the "why" behind your technical choices. It is the most important part of your design discussion.

Becoming a Backend Engineer at Expedia Group is an opportunity to build technology that shapes how the world travels. By focusing on your mastery of distributed systems, algorithmic clarity, and collaborative problem-solving, you will position yourself for success in our rigorous interview process. Remember that the best candidates are those who communicate their thought process clearly and demonstrate a genuine passion for solving complex, large-scale problems.

You can explore additional interview insights, practice questions, and preparation resources on Dataford to further refine your skills. We encourage you to approach your interviews with confidence, knowing that focused preparation will allow you to showcase your true potential as an engineer.

The compensation data above provides a transparent view of the salary range for this position. Candidates should interpret these figures as a guideline that reflects total base compensation, keeping in mind that actual offers are determined by a combination of experience, technical proficiency, and specific team needs.