Senior Software Engineer - Frontend Developer | ServiceNow | Interview Experience (Feb 2026)
- Posted
- 28 Mar 2026
Summary
I interviewed for a Senior Software Engineer - Frontend Developer role at ServiceNow, cleared all interview rounds, but the hiring was paused afterward.
How it went
Hi everyone,
I recently went through the interview process for a Senior Software Engineer - Frontend Developer role at ServiceNow, and wanted to share my experience.
Round 1 (DSA + Frontend Design)
- Brief introduction
- Interviewier explained his background
- Merge Intervals - https://leetcode.com/problems/merge-intervals/
- Copy Linked List with Random Pointer - https://leetcode.com/problems/copy-list-with-random-pointer/
Frontend System Design:
- Design a Nested Comments system
- Focus on component structure
- Data flow and recursion
- Handling deeply nested threads
Verdict: ✅ Cleared
Round 2 (Frontend Coding)
- Build an Autocomplete Search Component
- Debouncing
- API handling
- UX considerations (loading, empty state, etc.)
Verdict: ✅ Cleared
Round 3 (System Design + Deep Dive)
- 2 Interviewers
- Introduction + detailed discussion on past experience
System Design:
Design a Notification Panel for a Web App
- Component structure (modular design)
- State management strategy
- Data fetching & API interaction
- Handling loading states, real-time updates, and data consistency
Performance Question
- Problem: Rendering 100k messages efficiently
Expected Solution:
- List Virtualization
- Support for dynamic heights
- Proper scroll management
Verdict: ✅ Cleared
Final Outcome
All rounds were successfully cleared.
However, the process did not proceed further as ServiceNow paused hiring for the engineering teams, and no further interviews were scheduled.
Questions asked (6)
- 01
Merge Intervals
Data Structures & Algorithms
Open the problemGiven an array of intervals where intervals[i] = [start_i, end_i], merge all overlapping intervals, and return an array of the non-overlapping intervals that cover all the intervals in the input.
- 02
Copy List with Random Pointer
Data Structures & Algorithms
Open the problemGiven a linked list where each node contains an additional random pointer which could point to any node in the list or null, return a deep copy of the list.
- 03
Design a Nested Comments System
System Design
Design a Nested Comments system focusing on component structure, data flow and recursion, and handling deeply nested comment threads.
- 04
Build an Autocomplete Search Component
System Design
Implement an Autocomplete Search component with debouncing, API handling, and appropriate UX considerations such as loading and empty states.
- 05
Design a Notification Panel for a Web App
System Design
Design a Notification Panel for a web application, covering component structure (modular design), state management strategy, data fetching & API interaction, and handling loading states, real‑time updates, and data consistency.
- 06
Render 100k Messages Efficiently
System Design
Discuss strategies to efficiently render a list containing 100,000 messages in a web UI, focusing on list virtualization, support for dynamic item heights, and proper scroll management.