⚡Gojek Frontend Interview Experience — Staff Engineer Role (2025)

Overview

The Gojek Staff Frontend Engineer interview process is designed to evaluate a candidate's ability to handle real-world problems at scale. The process assesses not only coding skills but also architectural thinking, collaboration, and product sense, aligning with Gojek's engineering culture.

Interview Rounds

The interview process consists of six rounds, each focusing on different aspects of the candidate's skillset:

Round 1: Online Coding Assessment

This round focuses on practical React skills, problem-solving, reusability, and performance.

• Tasks:

  • Building a reusable custom hook for form validation, enabling field registration, synchronous and asynchronous validations, and error message display.
  • Implementing pagination with React, using useState and useEffect to decouple logic and ensure cache awareness.
  • Developing an infinite scroll component using the IntersectionObserver API and React memoization techniques to optimize rendering and prevent unnecessary re-renders.

• Key takeaway: Clean component structure and reusability with readability are crucial.

Round 2: Technical Screening (Live Coding + Deep Dive)

This 1-hour session involves live coding and detailed explanations of design decisions.

• Highlights:

  • In-depth discussion of memoization techniques for optimizing filtering features on large datasets, including scenarios where memoization may be detrimental.
  • Discussion of state management strategies, including Redux Toolkit, React Context, and Zustand, covering appropriate use cases for each.
  • Implementation of an event queue manager using Promises and async/await to simulate a debounced search system, ensuring only the latest response is displayed.

• Interviewer's focus: The candidate's ability to abstract logic, communicate trade-offs, and ensure predictable UI behavior.

Round 3: System Design Interview

This round assesses the candidate's ability to design scalable frontend architectures.

• Scenarios:

  • Designing a real-time notification system using WebSockets with Server-Sent Events as a fallback, including batching, reconnection strategies, and message acknowledgment.