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I will fix or integrate google oauth secure user authentication jwt or firebase login
John M
About this gig
Looking for a professional developer to integrate secure authentication into your web application?
I specialize in building and fixing modern authentication systems using Google OAuth, Firebase Authentication, JWT, and secure API authentication for web applications and SaaS platforms. Whether you need a complete login system, social login integration or authentication bug fixes, I can help you deliver a secure and seamless user experience.
Services I Offer
- Google OAuth Integration
- Firebase Authentication Setup
- JWT Authentication & Authorization
- Social Login Integration
- Secure User Login System
- API Authentication
- Role Based Access Control (RBAC)
- Protected Routes Setup
- Password Reset & Email Verification
- Authentication Bug Fixing
- Session & Token Management
- Backend Authentication Security
Technologies I Work With
Firebase |Node.js |Express.js |React.js |Next.js |MongoDB |JWT |OAuth 2.0 |REST API
What You Will Get
- Secure authentication integration
- Responsive and reliable login system
- Proper API security implementation
- Clean and maintainable code
- Fully tested authentication flow
Get to know John M
John M
Reliable Automation, Built Around Your Goals and Your Satisfaction
- FromDenmark
- Member sinceApr 2026
- Avg. response time1 hour
Languages
English, Spanish, German, French, Portuguese
I'm John Maxwell, an automation Expert specializing in n8n, Make.com, and Zapier workflow automation. I build, fix, and optimize custom automations — from simple app integrations to full AI agent pipelines using GPT-4 and OpenAI. Whether you need a workflow built from scratch, a broken scenario debugged, or your entire Zapier/Make stack migrated to n8n, I deliver clean, reliable solutions. Every build is documented and tested
Other Software Development Services I Offer
FAQ
Do you integrate Google OAuth login?
Yes, I can integrate Google OAuth authentication into web and mobile applications securely.
Can you fix Firebase authentication errors?
Absolutely. I can troubleshoot and fix Firebase login, authentication, and token related issues
Which technologies do you support?
I work with React, Next.js, Node.js, Express.js, Firebase, MongoDB, REST APIs, and JWT authentication systems
Can you implement social login?
Yes. I can integrate Google, Facebook, GitHub, Apple, and other social authentication providers
Can you work on existing projects?
Yes, I can integrate authentication into existing applications or fix broken authentication systems.
Do you provide backend authentication APIs?
Yes, I can create secure authentication APIs with JWT, refresh tokens, session handling, and role-based access control
