Expedia (IT) Frontend Engineer interview questions & guide 2026

The following questions are representative of the patterns observed in recent Frontend Engineer interviews at Expedia (IT). While your specific experience may vary, these categories highlight the core competencies our hiring teams prioritize.

Code Review & Performance Optimization

These questions assess your ability to read, debug, and improve existing production-grade code. You will be expected to demonstrate a "senior mindset" by identifying inefficiencies rather than just writing new features.

• Walk me through this React component as if you were performing a real PR review.
• Can you identify the performance bottlenecks in this specific rendering cycle?

Preparation for Expedia (IT) should be strategic. Focus on demonstrating deep technical mastery alongside a pragmatic approach to problem-solving.

Technical Depth – You must demonstrate a firm grasp of the React ecosystem, including hooks, lifecycle methods, and the virtual DOM. We evaluate your ability to write clean, reusable code that balances elegance with performance.

Performance-First Mindset – We look for engineers who consider the implications of their code at scale. Be ready to discuss how your architectural choices impact browser performance, user latency, and bundle sizes.

Communication & Collaboration – As a Frontend Engineer, you are a bridge between design and backend systems. Your ability to articulate your thought process during a code review is as important as the technical solution you propose.

The interview process at Expedia (IT) is designed to simulate the collaborative, real-world environment of our engineering teams. You should expect a rigorous focus on practical application—specifically, your ability to handle existing codebases and improve them. The process typically moves from initial screening to deeper technical dives, with a strong emphasis on your ability to perform under the conditions of a live PR review.

This timeline provides a high-level view of the stages from initial screening to final assessment. Use this to pace your preparation, ensuring you have enough time to review core concepts before the technical rounds. Note that the number of stages can vary based on your seniority and the specific team you are joining.

React Performance Analysis

This is the cornerstone of the current Frontend Engineer interview. We evaluate your ability to spot anti-patterns, such as excessive re-renders or inefficient state updates.

Be ready to go over:

• Memoization techniques – When and why to use useMemo and useCallback.
• Component life-cycle – Understanding how state changes trigger updates.
• Rendering optimizations – Identifying unnecessary DOM operations.
• Advanced concepts – Code splitting, lazy loading, and virtualized lists.

Example scenarios:

• "Here is a component that fetches data on every render; how do you fix it?"
• "Analyze this list component; why is it performing poorly with 1,000 items?"

As a Frontend Engineer, your primary objective is to maintain and evolve the frontend architecture of our travel platforms. You will spend your days working within a complex, distributed environment, ensuring that every user interaction is seamless.

• PR Reviews and Mentorship: You will actively participate in the code review process, ensuring that the team maintains high standards for quality and performance.
• System Architecture: You will contribute to the design of scalable UI components that can be reused across different travel products.
• Cross-functional Collaboration: You will work with backend engineers to define efficient API contracts and with designers to ensure pixel-perfect implementation of complex interfaces.
• Performance Tuning: You will proactively monitor and improve site performance metrics, such as Largest Contentful Paint (LCP) and Cumulative Layout Shift (CLS).

A competitive candidate for the Frontend Engineer position at Expedia (IT) brings a mix of strong technical fundamentals and a collaborative spirit.

• Technical Skills: Proficiency in JavaScript/TypeScript, deep expertise in React, and a strong understanding of modern build tools (e.g., Webpack, Vite).
• Experience Level: 3+ years of professional frontend experience, ideally in a large-scale, consumer-facing product environment.
• Soft Skills: Ability to explain technical trade-offs to non-technical stakeholders and a proactive approach to solving architectural debt.

Q: Is the coding portion strictly limited to code reviews? A: While the current focus is heavily on code reviews and performance analysis, you should still be prepared for brief algorithm or component-design questions if the interviewer deems it necessary to assess your fundamental problem-solving skills.

Q: How much time should I spend preparing for performance tuning? A: Dedicate significant time to understanding how the browser renders pages and how React manages state. This is the single most common area of focus for the Frontend Engineer role.

Q: What is the culture like at Expedia (IT)? A: We value data-driven decision-making, collaboration, and a "customer-first" mentality. You will be expected to defend your technical choices with data and user-centric logic.

• Think Aloud: During the PR review, explain your reasoning for every suggestion. It helps the interviewer understand your technical maturity.
• Be Pragmatic: When identifying performance issues, suggest solutions that are maintainable. Avoid "over-engineering" just for the sake of it.
• Know Your Tools: Be prepared to talk about the developer tools you use to profile performance.
• Be Prepared for Ambiguity: If a component seems fine at first glance, look closer. There is almost always a subtle performance gain to be found.

The Frontend Engineer role at Expedia (IT) is a high-impact position that demands both technical precision and a deep understanding of user experience. By focusing your preparation on code analysis, performance optimization, and clear communication, you will be well-positioned to excel during your interviews.

The compensation data above reflects the market standard for this role and location. Use this to inform your expectations during the negotiation phase. Remember that your interview performance and depth of experience are the primary drivers of your final offer. Prepare thoroughly, stay confident, and approach your interviews as a collaborative conversation.