Identity and Access Management Explained for Developers

Most applications today depend on multiple systems. A single user session may involve a web app, mobile app, APIs, internal services, and third-party SaaS tools. Each of these systems needs to answer two basic questions. Who is this user? What is this user allowed to do? Identity and Access Management, usually called IAM, exists to solve this problem. Instead of every application handling authentication and permissions separately, IAM provides a centralized way to manage identities and access across systems. For developers building modern applications, understanding IAM is part of building secure software. What Identity and Access Management Actually Does Identity and Access Management focuses on two core functions. Authentication verifies a user’s identity. Authorization determines what actions a user can perform. In practice, IAM platforms manage several responsibilities. User authentication Access policies Role and permission management Single sign-on Multi-factor authentication Ide