I applied through an employee referral and soon got a call from the HR team to discuss the role and expectations. This was followed by an initial screening call with the hiring manager. After that, there were four technical rounds and two fitment rounds, in the following order:

• Round 1 – JavaScript & Web Fundamentals: This one focused on JS output-based questions and how JavaScript actually runs in the browser. Topics included function polyfills, accessibility, web security, and memory management.
• Round 2 – Data Structures & Algorithms (DSA): For frontend folks, this round is manageable, but backend candidates might find it a bit tougher. Expect medium to hard-level questions. Key areas included dynamic programming, backtracking, arrays, strings, and problem-solving under pressure.
• Round 3 – React (LLD): There was a hands-on coding round where I had to build a small React app, and the setup was already provided. The interviewer mainly observed how I approached the problem, used React effectively, and wrote clean, scalable code.
• Round 4 – High-Level Design (HLD): This round was about core web architecture, which included memory management, state management, authentication, networking, deployments, and security.
• Round 5 & 6 – Fitment Rounds: These were two back-to-back in-office discussions with senior leadership. They focused on my past work, what I could bring to the team, and what I was looking for from the role. Both were genuinely insightful and conversational.

The overall interview process was incredibly smooth and well-organized. All the interviewers were polite, patient, and genuinely curious about my thought process. About a week later, I got the call that I had cleared all rounds, and they would be rolling out the offer soon.

How do you fix a web app that is very slow? List all the things you would do.