OAuth 2.0 Microservices Authentication

B2B authentication system for Nike.net

Project Overview

Built internal authentication server where nike.net's 15+ applications authenticate via OAuth Client Credentials flow. Designed a system architecture enabling secure and efficient authentication for dozens of microservices through distributed token management and centralized authorization control.

Challenge

The challenge was designing an OAuth 2.0 authentication system that could support the complex requirements of dozens of microservices, provide secure token management, ensure high availability and performance, and enable scalable authorization management while maintaining security best practices.

Solution

OAuth 2.0 Complete Implementation

Implemented comprehensive OAuth 2.0 authentication server supporting Client Credentials flow for B2B applications and Authorization Code flow for user authentication.

Client Credentials Flow: Machine-to-machine authentication for nike.net applications

Authorization Code Flow: User-based authentication with PKCE security enhancement

JWT Token Implementation: Stateless token architecture with digital signatures

JWKS (JSON Web Key Set): Public key distribution for token validation

Centralized Authorization Management

Built scalable authorization system with role-based access control and resource-level permissions management.

Role-Based Access Control (RBAC): Hierarchical permission management system

Resource-Level Authorization: Fine-grained access control for APIs and resources

Dynamic Permission Evaluation: Real-time permission checks with caching optimization

Multi-tenant Authorization: Support for different client applications with isolated permissions

Scalable Microservice Architecture

Implemented a scalable architecture that facilitates adding new services and onboarding B2B partners.

Service independence: Autonomous authentication processing for each microservice

Standardized API Gateway integration

Dynamic client registration and management

Scalable token store and cache system

Tech Stack

OAuth 2.0

OAuth 2.0 Server Implementation

JWT

JWT Token Management

Spring Security

JWKS Public Key Distribution

Redis

Role-Based Access Control (RBAC)

Oracle

High-Performance Token Validation

MySQL

Distributed Authentication Architecture

Container

Security Token Service (STS)

AWS

Authentication Provider Integration

Akamai

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Key Results

Successfully secured 15+ nike.net applications with centralized authentication

Dramatically improved security posture through OAuth 2.0 standard implementation

Achieved high-performance authentication with token caching and validation optimization

Enabled scalable microservices communication through standardized token-based authentication

Established foundation for future authentication and authorization requirements with stateless tokens

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Learnings

OAuth 2.0 provides standardized authentication approach for microservices environments

JWT token-based authentication significantly improves scalability and performance in distributed systems

Centralized authorization management is essential for maintaining consistent security policies

Token caching strategies have critical impact on authentication system performance and availability

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