Explore the common pitfalls in API design and learn how to create effective, user-friendly interfaces in this 43-minute conference talk from Devoxx. Discover the "7 Deadly Sins of API Design" and gain insights into distinguishing good APIs from problematic ones. Examine real-life examples of design flaws, understand their negative impacts, and learn remediation strategies using best practices. Delve into API-design first techniques for preventing common issues, and engage with a balanced mix of theory and practical applications. Cover topics such as API documentation, Richardson maturity model, GraphQL, backend API invention, and ensuring APIs are fit for purpose. Benefit from this interactive session to improve your API design skills and create more robust, efficient interfaces for modern architectures.