Authentication Solutions I Deliver
Secure Token Strategies
I design robust refresh token rotation strategies, ensuring long-lived sessions remain uninterrupted while keeping the attack surface near zero.
XSS & CSRF Prevention
If you store JWTs in localStorage, you are vulnerable. I migrate authentication flows to strictly use HTTP-only, Secure, and SameSite cookies.
Role-Based Access (RBAC)
Beyond just login, I implement stateless custom claims within the JWT payload to handle complex multi-tenant permissions without extra database queries.
Need Immediate Security Audits?
Experiencing strange 401 errors, or worried about a recent vulnerability scan report? Let an expert review your authentication middleware.
Frequently Asked Questions
Why should I hire a freelance JWT developer?
Authentication is not something you want to get wrong. A specialized JWT developer understands the nuances of stateless authentication, preventing XSS attacks, mitigating CSRF vulnerabilities, and ensuring your user sessions are impenetrable.
How do you handle JWT token expiration securely?
I implement short-lived access tokens combined with secure HTTP-only, secure-flagged refresh tokens. This prevents attackers from stealing long-lived tokens from localStorage while maintaining a seamless UX through automatic background token rotation.
Do you integrate third-party OAuth providers?
Yes. I regularly integrate Google, GitHub, LinkedIn, and Apple OAuth2 flows, mapping them seamlessly into custom JWT-based session strategies for Node.js and Next.js applications.
Can you fix an existing authentication system?
Absolutely. If your current authentication is throwing random 401 Unauthorized errors, or if you suspect it is vulnerable to XSS token theft, I can audit your code, refactor your middleware, and secure your API routes.