Snapchat iOS Fulltime SDE Onsite Interview Experience and Questions

snapchat | Software Engineer | Onsite

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


I had a great interview experience with Snapchat. The interview process was rigorous but fair.

The first round was a technical phone screen where I was asked questions related to algorithms and data structures. I was specifically asked to solve a problem that involved dynamic programming. Following that, I had one or two behavioral questions to assess cultural fit.

After passing the phone screening, I was invited for an onsite interview. The onsite included 3 rounds: coding, system design, and behavioral.

In the coding round, I was given problems such as ‘Two Sum’ and ‘Longest Substring Without Repeating Characters’. I used LeetCode effectively to prepare for these questions. The interviewers were kind and provided hints when I was stuck.

The system design round was interesting as I had to design an API for a social media application. This was an open-ended discussion, and the interviewer was looking for a solid understanding of scalability and architecture.

Overall, the experience was positive, and I felt that the interviewers were genuinely invested in my success.

Interview Questions

Two Sum

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

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

Longest Substring Without Repeating Characters

Given a string, find the length of the longest substring without repeating characters.

Difficulty: Medium | Reference: LC-3 | Tags: Hash Table, Sliding Window