Expect a mix of rapid-fire fundamental questions and deep-dive technical discussions. The goal is to verify both the breadth and depth of your engineering knowledge.

Frontend & Core Web Technologies

This category tests your understanding of the tools you will use daily.

• What are the primary differences between an Interface and a Type in TypeScript?
• How does the React Virtual DOM improve performance?
• Describe the "Temporal Dead Zone" in JavaScript.
• How would you handle state management across a large-scale application with multiple nested components?
• What are the pros and cons of using Functional Components vs. Class Components in modern React?

Coding & Logic

These questions focus on your ability to write clean, logical code under pressure.

• Write a function to flatten a deeply nested array without using built-in methods.
• How would you implement a "loading" state for multiple concurrent API calls?
• Given a string, find the first non-repeating character.
• Explain how you would implement a custom hook for handling window resizing.
• Solve a series of multiple-choice questions on JavaScript closures and hoisting.

Behavioral & Experience

These questions assess your past performance and cultural fit.

• Tell me about a time you had to work with a difficult stakeholder or team member.
• Describe a project where you had to learn a new technology very quickly.
• What is your process for debugging a complex production issue?
• How do you ensure your code is accessible to all users?
• Why do you want to work at CHEP specifically, and how does your experience align with our mission?

This timeline illustrates the typical progression from initial contact to the final decision. Candidates should use this to pace their study, focusing heavily on frontend fundamentals before the screening phase and shifting to system design and project presentation skills for the later rounds.

Deep Dive into Evaluation Areas

Frontend Fundamentals (React & TypeScript)

At CHEP, frontend excellence is critical for building the complex dashboards and tracking tools used by global logistics teams. You will be tested on your ability to write clean, efficient, and type-safe code.

Be ready to go over:

• React Hooks & Lifecycle – Understanding how to manage state and side effects effectively.
• TypeScript Type Systems – Using interfaces, generics, and union types to ensure code reliability.
• Performance Optimization – Techniques for rendering large datasets and optimizing component re-renders.
• Advanced concepts (less common) – Custom hooks development, state management libraries (Redux/Zustand), and SSR/Next.js patterns.

Example questions or scenarios:

• "Explain the difference between useMemo and useCallback and when you would use each in a high-performance application."
• "How would you migrate a legacy JavaScript component to TypeScript while maintaining type safety?"
• "Build a search-as-you-type component that handles API debouncing and error states."

Practical Coding & Logical Reasoning

The "Project Practical" or "Live Coding" round is where you demonstrate your ability to build functional software under time constraints. CHEP focuses on your approach to problem-solving and your ability to produce working code.

Be ready to go over:

• Data Structures – Efficiently manipulating arrays and objects for supply chain data.
• API Integration – Fetching and displaying data from RESTful services.
• Logical Puzzles – Solving algorithmic challenges that test your core programming logic.

Example questions or scenarios:

• "Given a set of asset tracking data, write a function to calculate the most efficient route between two points."
• "Complete a 90-minute practical project using React and TS that involves building a dynamic dashboard."
• "Solve a series of logical coding questions focused on array manipulation and string parsing."

Project Presentation & Architecture

For many roles, especially in regions like Mexico City or India, you may be asked to present a technical test or a previous project to a panel of managers.

Be ready to go over:

• System Design – How you architected a solution from scratch.
• In-house Frameworks – Your experience working with or building specialized internal tools.
• Code Quality – Your standards for testing, documentation, and maintainability.

Example questions or scenarios:

• "Walk us through the most complex feature you've built. What were the constraints, and how did you overcome them?"
• "Present your solution to the take-home technical test and defend your choice of library and state management."