Snapchat iOS Fulltime SDE Onsite Interview Experience and Questions

snapchat | Mobile | Onsite

Timeline: 2026(Jan - Mar) • Fulltime • JobHopper • :hourglass_not_done: Waiting for result


I had an onsite interview with Snapchat for a full-time SDE role. The interview consisted of multiple rounds that focused on coding and system design.

In the first round, I was asked to solve a problem involving data structures, which required a solid understanding of algorithms. The interviewer was very technical and pushed me to explain my thought process.

The second round focused on system design. They asked me to design a feature for the Snapchat application, which included various components and how they would interact with each other. I had to think through scalability and potential bottlenecks in the system.

Overall, the interview was challenging but engaging. I felt that I was able to showcase my skills effectively.

Interview Questions

Data Structures Problem

Given a list of integers, find two numbers such that they add up to a specific target number. Return the indices of the two numbers in the form of an array. Assume that each input would have exactly one solution.

Difficulty: Easy | Reference: LC-1 | Tags: Array, Hash Table

System Design: Snapchat Feature

Design a feature for Snapchat that allows users to react to snaps in real time with emojis. Discuss user experience, technical architecture, and how you would manage user data.

Difficulty: Hard | Tags: System Design, Architecture