API Security and OAuth Fundamentals for Developers

Secure APIs are the backbone of modern software engineering, yet implementing robust authentication and authorization remains a major challenge for many developers. Understanding how to protect data and safely integrate with external services is one of the most valuable skills you can add to your technical toolkit. This text-based course guides you from the fundamental concepts of API security to the practical implementation of modern authorization standards. You will transition from feeling uncertain about security protocols to confidently designing, analyzing, and securing APIs using industry-accepted frameworks. What you'll learn: - Understand the core principles of API security, including authentication, authorization, and common vulnerability vectors. - Master OAuth delegation frameworks and learn how to choose the right authorization grant types for your application architecture. - Configure modern authentication flows, including Proof Key for Code Exchange (PKCE) for mobile and single-page applications. - Implement JSON Web Tokens (JWTs) securely, avoiding common pitfalls related to signature verification and token storage. - Apply zero-trust security concepts to API design, ensuring strict access control and minimal privilege principles. - Practice identifying and mitigating security risks through step-by-step written walkthroughs and real-world scenarios. This structured course starts with essential terminology and the foundational mechanics of web security before moving into advanced authorization flows. Through clear written explanations and practical code examples, you will learn how to architect secure connections for web, mobile, and backend integrations. This course is designed for beginner to intermediate software engineers, mobile developers, and web architects looking to build secure applications. No prior experience with security protocols is required. Step up your security game and start building highly secure, resilient APIs today.