Dunzo : Frontend Engineer Interview Experience | How I cracked it ?

Overview

The candidate was drawn to Dunzo by its innovative approach to urban delivery and its utilization of cutting-edge technology. The interview process was designed to thoroughly assess the candidate's technical capabilities, problem-solving skills, and alignment with the company's culture.

Interview Rounds

The interview process consisted of several rounds, each focusing on different aspects of the candidate's skills and experience:

Round 1: Initial Screening (45 minutes)

This round focused on evaluating the candidate's fundamental knowledge of the frontend ecosystem. Key areas of inquiry included React, state management, and performance optimization techniques for single-page applications. The candidate highlighted their experience with React Hooks, Redux, and responsive design principles.

Round 2: Technical Coding Interview (90 minutes)

This round presented the candidate with practical coding challenges designed to assess their frontend engineering abilities. The challenges included:

1. Custom Hook Challenge: Developing a custom React hook for complex form management, including validation, error handling, dynamic state management, and asynchronous submission with loading states.
2. Performance Optimization Problem: Refactoring a poorly performing React component by implementing memoization, reducing unnecessary re-renders, and optimizing bundle size.
3. Accessibility and Responsive Design: Creating a fully accessible (WCAG compliant) dropdown component with keyboard navigation, proper ARIA attributes, and responsive design across various device sizes.

Round 3: System Design for Frontend (75 minutes)

This round delved into architectural decisions related to frontend system design. The task involved designing a real-time tracking dashboard for delivery partners, encompassing WebSocket connections, efficient data rendering, and a responsive layout optimized for both mobile and web platforms. Key discussion points included state management strategies, performance optimization, micro-frontend architecture, and handling real-time data updates.

Round 4: Behavioral Interview (60 minutes)

This round assessed the candidate's problem-solving abilities and teamwork skills. Questions focused on situations where the candidate disagreed with a design decision, how they stay updated with frontend technologies, and instances where they solved challenging UI/UX problems.

Round 5: Technical Manager Round (60 minutes)