How to answer this Technical interview question about API Design for Mid-Level Full Stack Developer?

What are the key considerations when designing a RESTful API?

Full Stack Developer

Technical

Asked at

Stripe

Difficulty :

Medium

Explanation

This question tests your understanding of API design principles, an essential skill for full-stack developers. Recruiters are assessing your knowledge of REST architecture, best practices, and your ability to design APIs that are scalable, secure, and maintainable. A great answer would include considerations like proper use of HTTP methods, status codes, data formats, security, and versioning. Avoid overly theoretical explanations without practical examples.

Answer Example

When designing a RESTful API, I consider the following: proper use of HTTP methods (GET, POST, PUT, DELETE) to ensure clear functionality, meaningful and consistent status codes for error handling, and adopting JSON as the data format for interoperability. Security is another priority, so I implement HTTPS, authentication mechanisms like OAuth, and input validation to prevent SQL injection. For scalability, I design stateless APIs, use pagination for large datasets, and include versioning to manage updates without breaking existing implementations. For example, while designing an API for a payment platform, I ensured idempotency in POST requests to handle retries gracefully.

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