How to build authorization like Netflix with Open Source?

Netflix, with its vast user base, faces significant challenges in managing authorization to ensure that only the appropriate users access specific content, a task made complex by the need to tailor offerings based on user interests and regional factors. To address this, Netflix employs the Open Policy Agent (OPA), an open-source policy engine, for policy enforcement, though its complexity initially limited policy management to a small group. To broaden access, Netflix developed a user interface that facilitates the creation and testing of Rego policies, ensuring they align with intended outcomes before deployment. Although Netflix's solution remains proprietary, it inspired the open-source project OPAL (Open Policy Administration Layer), which synchronizes policy updates in real-time across applications and is used by major companies like Tesla and Walmart. OPAL's architecture facilitates seamless integration of policies and data, while Permit.io offers a no-code interface for managing complex authorization policies. OPAL continues to grow, supported by a community of developers and contributors.

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