My ServiceNow Software Engineer_UI Interview Experience: 2025

Overview

This document details a candidate's experience interviewing for a Software Engineer (UI) role at ServiceNow. The process included a screening call, multiple technical interviews focused on JavaScript and React, and a final interview with the hiring manager. The candidate's performance was evaluated based on technical proficiency, problem-solving abilities, and alignment with the company's values.

Interview Rounds

Round 1: Screening Call

The initial screening call involved a discussion of the candidate's background, previous projects, and career aspirations. The interviewer assessed the candidate's suitability for the role and the company culture.

Round 2: JavaScript and React Fundamentals

This round focused on core JavaScript concepts, including closures, promises, and polyfills. The candidate was asked to write polyfills, specifically for the map function, and explain the output of given code snippets. This assessed the candidate's understanding of JavaScript fundamentals and problem-solving approach.

Round 3: Deep Dive into JavaScript

The third round delved deeper into JavaScript fundamentals, with a focus on closures, scope, and variable handling within loops. The candidate was tasked with writing functions to increment and decrement variables inside loops. Furthermore, the candidate was again asked to implement polyfills to demonstrate an understanding of JavaScript's inner workings and the ability to write production-ready code.

Round 4: Hiring Manager

The final round consisted of an interview with the hiring manager, which combined basic JavaScript concepts with high-level discussions. Questions covered topics such as the differences between Objects and Maps in JavaScript, the internal workings of Maps, and the rationale for choosing Maps over Objects in real-world scenarios. The interviewer focused on evaluating the candidate's reasoning, depth of understanding, and ability to make thoughtful trade-offs.

Key Takeaways

• ServiceNow's interview process for UI engineering roles emphasizes a strong understanding of JavaScript fundamentals.
• Candidates should be prepared to discuss and implement core JavaScript concepts such as closures, promises, and polyfills.
• The hiring manager round assesses not only technical knowledge but also the candidate's problem-solving approach and alignment with the company's values.
• Demonstrating clear reasoning, a depth of understanding, and the ability to make thoughtful trade-offs are crucial for success.