TrueFoundry Senior Frontend Engineer Interview Experience

Overview

This document outlines the interview experience of a candidate who applied for a Senior Frontend Engineer position at TrueFoundry in October 2025. The interview process was structured into four rounds, but the candidate's process concluded after the second round. The rounds focused on assessing JavaScript proficiency, problem-solving skills, and the ability to implement frontend components.

Interview Rounds

The interview process comprised the following rounds:

Round 1: JavaScript Deep Dive + Machine Coding (60 minutes)

This round evaluated the candidate's understanding of JavaScript fundamentals and their ability to implement React components.

• Problem 1: Deep Clone with Circular References

  • The candidate was tasked with implementing a deep clone function for objects, with the added complexity of handling circular references.
  • The candidate initially struggled with circular references but successfully solved the problem after receiving a hint about using WeakSet.

• Problem 2: NxN Tic Tac Toe Game

  • The candidate was required to implement a configurable NxN Tic Tac Toe game with the following features:
    • Configurable board size via a dropdown (3x3, 4x4, 5x5, etc.).
    • Win detection and announcement.
    • Reset functionality.
    • Handling draw scenarios.
  • The candidate successfully implemented the board rendering, player turns, win detection for rows, columns, and diagonals, and the dropdown for configuring the board size.
  • Due to time constraints, the candidate was unable to complete the draw scenario logic and the reset functionality.

Round 2: DSA + Machine Coding (60 minutes)

This round combined algorithmic problem-solving with practical UI implementation.

• Problem 1: Array Subsets

  • The candidate was asked to print all possible subsets of a given array of integers.
  • The candidate successfully solved the problem using loops but did not implement the recursive approach that the interviewer asked for orally at the end of the round.

• Problem 2: Hotstar-Style Carousel

  • The candidate was tasked with implementing a carousel similar to the one found on Hotstar's homepage, with the following requirements:
    • Main display area showing the current slide.
    • Thumbnail strip below the main area.
    • Previous and next navigation buttons.