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Backend & Infrastructure

Authentication Systems

Secure user authentication and authorization

4 years of experience

Overview

Implemented comprehensive authentication engines with OAuth, JWT, and multi-factor authentication. Built secure, scalable auth systems that protect user data while providing seamless experiences.

In-Depth Experience

Built secure authentication systems that protect user accounts and sensitive data while providing seamless login experiences.

Implemented OAuth 2.0 flows for social login (Google, Apple, Facebook) and third-party API integrations.

Designed JWT-based authentication with proper token expiration, refresh mechanisms, and secure storage practices.

Added multi-factor authentication (MFA) using SMS, email, and authenticator apps to provide additional security for sensitive operations.

Implemented role-based access control (RBAC) systems that manage user permissions and restrict access to sensitive features.

Built session management systems that handle concurrent logins, device tracking, and automatic logout for security.

Ensured compliance with security best practices including password hashing (bcrypt), secure token storage, and protection against common attacks (CSRF, XSS).

Key Highlights

OAuth 2.0 implementation

JWT token management

Multi-factor authentication

Role-based access control

Technologies & Tools

OAuth
JWT
Auth0
Firebase Auth

Real Impact

"Secured platforms handling sensitive financial data"

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