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Fullstack Developer Interview Questions

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2,858 fullstack developer interview questions shared by candidates

1. Technical Phone Screen: - Implement a function to reverse a string in-place. - Describe the differences between value types and reference types in Swift. - Explain the concept of memory management in iOS development. 2. Onsite Technical Interview: - Design a system for a social media platform, focusing on user authentication and security measures. - Write a program to find the maximum sum of a subarray within an array of integers. - Discuss the advantages and disadvantages of using a relational database versus a NoSQL database for a specific project. 3. Behavioral Interview: - Tell us about a challenging project you worked on and how you overcame obstacles during its development. - Describe a situation where you had to collaborate with a difficult team member and how you managed to achieve successful results. - Explain how you stay updated with the latest industry trends and technologies. 4. System Design Interview: - Design a scalable and fault-tolerant system for a ride-sharing application. - Discuss the architecture and components required to build a real-time chat application. - Explain the steps you would take to optimize the performance of a database query that is running slow.
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Fullstack Developer

Interviewed at Apple

4.1★
May 19, 2023

1. Technical Phone Screen: - Implement a function to reverse a string in-place. - Describe the differences between value types and reference types in Swift. - Explain the concept of memory management in iOS development. 2. Onsite Technical Interview: - Design a system for a social media platform, focusing on user authentication and security measures. - Write a program to find the maximum sum of a subarray within an array of integers. - Discuss the advantages and disadvantages of using a relational database versus a NoSQL database for a specific project. 3. Behavioral Interview: - Tell us about a challenging project you worked on and how you overcame obstacles during its development. - Describe a situation where you had to collaborate with a difficult team member and how you managed to achieve successful results. - Explain how you stay updated with the latest industry trends and technologies. 4. System Design Interview: - Design a scalable and fault-tolerant system for a ride-sharing application. - Discuss the architecture and components required to build a real-time chat application. - Explain the steps you would take to optimize the performance of a database query that is running slow.

There were many instances of interviews, three about system design these were easy. Three were algorithmic exercises in code, these ones were of medium-low difficulty, a good understanding of data structures is enough for them. The remaining two interviews were to discuss impactful contribution on previous jobs, nothing out of the ordinary, just extremely lengthy
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Fullstack Developer

Interviewed at Proofpoint

3.6★
Jun 30, 2025

There were many instances of interviews, three about system design these were easy. Three were algorithmic exercises in code, these ones were of medium-low difficulty, a good understanding of data structures is enough for them. The remaining two interviews were to discuss impactful contribution on previous jobs, nothing out of the ordinary, just extremely lengthy

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