Airtable India Frontend Engineer Interview: Rounds, Questions and Preparation

What the job involves

Frontend engineers build and maintain the user interfaces of web applications, turning design mockups into responsive, accessible, and performant code. In global tech product companies, they collaborate with designers, backend engineers, and product managers to ship features that millions of users interact with daily. The role involves writing clean JavaScript/TypeScript, debugging UI issues, and optimizing for speed and cross-browser compatibility.

Role & Technical Knowledge

1. 1

   Explain the difference between `var`, `let`, and `const` in JavaScript.

   Cover scoping (function vs block), hoisting, and reassignment rules. Mention temporal dead zone for `let` and `const`.

2. 2

   What is the virtual DOM in React and how does it improve performance?

   Describe how React creates a lightweight copy of the real DOM, diffs it on state changes, and batches updates to minimize expensive DOM operations.

3. 3

   How do you ensure a web application is responsive across devices?

   Mention media queries, flexible grids (Flexbox/Grid), relative units (rem, %), and testing on multiple screen sizes. Also touch on mobile-first design.

4. 4

   What are some common web performance optimization techniques you would use?

   Discuss code splitting, lazy loading, image optimization, caching, minification, and reducing render-blocking resources. Mention tools like Lighthouse.

Practical Scenarios

1. 5

   You need to build a paginated list of items fetched from an API. How would you approach it?

   Outline state management for current page, loading states, error handling, and caching. Mention using `useEffect` or React Query, and rendering with keys.

2. 6

   A user reports that a button is not working on their browser but works on yours. How do you debug?

   Describe checking browser compatibility, using console logs, breakpoints, and checking for polyfills. Mention testing in different browsers and versions.

3. 7

   How would you implement a dark mode toggle in a React app?

   Explain using CSS variables, context or state to toggle a class on the root element, and persisting preference in localStorage.

4. 8

   You inherit a codebase with inconsistent styling. How do you refactor it?

   Suggest adopting a CSS-in-JS or utility framework, creating a design system, and gradually replacing old styles while ensuring no regressions.

Behavioural & Teamwork

1. 9

   Tell me about a time you had a disagreement with a teammate on a technical approach. How did you resolve it?

   Use STAR method: describe the situation, your stance, how you listened to their perspective, and the data-driven decision you reached.

2. 10

   Describe a project where you had to learn a new technology quickly. How did you manage?

   Highlight your learning process: documentation, tutorials, building a small prototype, and seeking mentorship. Emphasize the outcome.

3. 11

   How do you handle feedback on your code during code reviews?

   Show openness to feedback, ask clarifying questions, and focus on improving code quality. Mention you see reviews as learning opportunities.

4. 12

   Give an example of a time you missed a deadline. What did you do?

   Be honest, explain the cause, how you communicated proactively, and what you changed to avoid recurrence. Show accountability.

HR & Company Fit

1. 13

   Why do you want to work as a frontend engineer at a product company like ours?

   Show passion for user experience, mention specific products you admire, and align with the company's mission. Avoid generic answers.

2. 14

   Where do you see yourself in 3-5 years?

   Express interest in growing into a senior engineer or tech lead, deepening expertise in frontend architecture, and mentoring others.

3. 15

   How do you keep up with the latest frontend trends and technologies?

   Mention blogs, newsletters, open-source contributions, side projects, and communities. Show genuine curiosity.

4. 16

   What are your salary expectations?

   Research industry standards for freshers in India. Give a range and express flexibility, focusing on the overall opportunity.