⚡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.
  • Architecting a multi-tenant app frontend with dynamic route generation, tenant isolation using micro frontends with Module Federation, and lazy loading with config-based theming.
  • Developing a real-time data visualization solution using data virtualization (react-window), throttling render cycles (requestAnimationFrame), and avoiding layout thrashing (useLayoutEffect).

• Key takeaway: Demonstrate the ability to scale UI and performance, not just code.

Round 4: Leadership & Collaboration

This round explores the candidate's ability to think beyond code, align with teams, mentor, and prioritize impact.

• Situations Discussed:

  • Balancing technical debt and delivery, including proposing phased refactors of legacy dashboards while meeting quarterly roadmap objectives.
  • Discussing code review philosophy, balancing constructive feedback with coaching, especially for junior and mid-level engineers.
  • Integrating frontend development with product specifications early to reduce rework and surprises during sprints.

• Key takeaway: Demonstrating value as a technical enabler, not just a senior individual contributor.

Round 5: Behavioral Interview

This STAR-based interview focuses on ownership and communication skills.

• Questions Included:

  • Handling conflicting technical opinions, such as choosing between GraphQL and REST for a multi-team project.
  • Managing high-priority workloads, including leading on-call war rooms for P0 bugs and documenting mitigation steps.
  • Driving UX improvements through frontend decisions, like replacing a legacy charting library for performance gains.

• Interviewer Insight: Seeking candidates who take initiative and elevate the organization, not just complete assigned tasks.

Round 6: Technical Deep Dive

This final round calibrates the candidate's technical expertise at a Staff level, focusing on architecture and scalability.

• Topics Covered:

  • Performance at scale, including Webpack optimizations, code splitting with dynamic imports, and CDN usage.
  • Frontend and microservices integration, proposing a Backend-for-Frontend (BFF) layer to abstract microservice complexity and reduce network calls.
  • Asynchronous data composition in the UI, utilizing React.Suspense with fallback boundaries and centralized error boundaries.

• Key Advice: Emphasize debugging and reasoning skills over coding speed.

Key Takeaways

The Gojek Staff Frontend Engineer interview process rigorously evaluates a candidate's technical abilities, system design expertise, leadership qualities, and collaborative skills. The process reflects the high bar set by high-scale product companies for Staff Engineers, requiring a comprehensive skillset beyond just coding proficiency.