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$
USD
I will set up or fix firebase, supabase and oauth authentication
Juan Gadiel R
5.0
5.0
About this gig
Need a reliable expert to set up or fix your authentication system? I specialize in secure login flows using Firebase, Supabase, and any OAuth-based provider like Google, Facebook, GitHub, and more.
Whether you need a full login system from scratch or just help fixing a broken callback, session issue, or login bug I've got you covered. I can handle:
- Email/password authentication
- Social logins (OAuth)
- Firebase or Supabase Auth setup
- Multi-provider authentication
- Debugging login/session issues
- Redirect/callback fixes
Perfect for web and mobile apps built with frameworks like Angular, React, Next.js, Flutter, and others.
Lets make your authentication flow fast, secure, and reliable. Send me your issue or requirements, and Ill get started right away!
Need API integrations or help setting up your database? Check out my API Gig and Database Gig for complete backend support!
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Get to know Juan Gadiel R
Juan Gadiel R
Full Stack and Backend Developer: APIs, Automation, Web Apps, AI
- FromUnited States
- Member sinceNov 2018
- Last delivery8 months
Languages
English, Spanish
I'm a Software Engineer with 10+ years of experience building reliable web apps, APIs, and automation tools. I specialize in backend and full-stack development using C#, Go (Golang), JavaScript, and PHP. I've worked on everything from internal enterprise tools to scalable public-facing apps. I'm new to freelancing and focused on delivering high-quality work to build strong client relationships.
FAQ
What platforms do you support for authentication?
I can set up or fix authentication for websites, mobile apps, and web apps using Firebase, Supabase, OAuth (Google, Facebook, GitHub, etc.), or custom providers.
Do you support social login integration?
Yes! I can integrate login with Google, Facebook, GitHub, Apple, Twitter, and any other OAuth-based provider.
Can you fix issues with my existing login system?
Absolutely. Just provide details on the issue and I’ll help resolve broken flows, session bugs, callback errors, and more.
Do you offer support for two-factor authentication (2FA)?
Yes, I can implement 2FA using Firebase or a custom method, depending on your platform and security needs.
What information do you need from me to get started?
I’ll need access to your codebase (GitHub or ZIP), authentication provider setup details (API keys, redirect URIs), and a clear description of the issue or goal.
Reviews
8 reviews for this Gig
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
T 
toneshagrant
Jamaica
Juan was very professional. He understood exactly what I needed, listened carefully, and fixed the issues as requested. I appreciated that he went above and beyond to have the project completed. I will definitely be working with him in the future.
$50-$100
Price
6 days
Duration
Helpful?M mattsfancy
United States
Our first small project went well and looking forward to working together on next steps.
$50-$100
Price
5 days
Duration
Helpful?A alexandre_szcze
France
Working with Juan was an outstanding experience. His professionalism and deep understanding of complex Firebase and authentication flows were very helpfull. He was highly cooperative and collaborative, taking the time to explain the nuances of the Steam OpenID integration and why certain approaches were...
$100-$200
Price
9 days
Duration
Helpful?T tamialnassar
Saudi Arabia
It was great working with Juan. He went above and beyond with the expectations and communication through different time zones went smooth. Very professional. Thank you Juan!
$100-$200
Price
7 days
Duration
Helpful?A amdiriye
Kenya
I was blown away by the quality and level of detail provided by Juan. I will be using him in the future.
$50-$100
Price
11 days
Duration
J 
Seller's Response
Helpful?
Reviews
8 reviews for this Gig
| (8) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
T toneshagrant
Jamaica
Juan was very professional. He understood exactly what I needed, listened carefully, and fixed the issues as requested. I appreciated that he went above and beyond to have the project completed. I will definitely be working with him in the future.
$50-$100
Price
6 days
Duration
Helpful?M mattsfancy
United States
Our first small project went well and looking forward to working together on next steps.
$50-$100
Price
5 days
Duration
Helpful?A alexandre_szcze
France
Working with Juan was an outstanding experience. His professionalism and deep understanding of complex Firebase and authentication flows were very helpfull. He was highly cooperative and collaborative, taking the time to explain the nuances of the Steam OpenID integration and why certain approaches were...
$100-$200
Price
9 days
Duration
Helpful?T tamialnassar
Saudi Arabia
It was great working with Juan. He went above and beyond with the expectations and communication through different time zones went smooth. Very professional. Thank you Juan!
$100-$200
Price
7 days
Duration
Helpful?A amdiriye
Kenya
I was blown away by the quality and level of detail provided by Juan. I will be using him in the future.
$50-$100
Price
11 days
Duration
J Seller's Response
Helpful?
