I will fix rest API integration, webhook, oauth2, and authentication bugs

R
reginajane74
R
reginajane74
Regina J
fix rest API integration, webhook, oauth2, and authentication bugs
Full Screen
fix rest API integration, webhook, oauth2, and authentication bugs

About this gig

Need a reliable developer to fix your REST API integration issues?


You're in the right place.


I specialize in troubleshooting and fixing API integration problems for web applications, SaaS platforms, mobile apps, and backend systems.


Whether you're facing authentication failures, webhook errors, JSON parsing issues, CORS problems, or HTTP errors, I'll identify the cause and implement a clean, secure solution.


My Services include:

  • REST API debugging and integration
  • OAuth2, JWT, and API key authentication
  • Webhook setup and troubleshooting
  • JSON/XML response handling
  • CORS and HTTP error fixes (400, 401, 403, 404, 429, 500)
  • Third party API integrations (Stripe, PayPal, Shopify, Twilio, OpenAI, Google APIs, and more)
  • GraphQL API troubleshooting
  • Postman API testing and validation
  • Performance optimization and error handling


I write clean, maintainable code, thoroughly test every fix, and keep you updated throughout the project.


Please contact me before placing an order so I can review your requirements and recommend the most suitable package.

  • Expertise

    • Debugging
    • Performance
    • Security
    • Databases
    • Testing procedures

  • Programming language

    • PHP

  • Frontend framework

    • Backbone.js
    • Bootstrap
    • Next.js
    • React.js
    • Tailwind CSS

  • Backend framework

    • Django
    • Laravel
    • CodeIgniter
    • Express.js
    • Firebase

Get to know Regina J

Regina J

API Integration And Authentication Bug Fix Specialist

  • FromNigeria
  • Member sinceAug 2026
  • Avg. response time1 hour

  • Languages

    English, Spanish, German, French, Italian
REST API Integration specialist helping you resolve API, webhook, OAuth2, and authentication issues with secure, reliable solutions. I work with startups, SaaS businesses, and growing companies to integrate, debug, and optimize third party APIs, ensuring smooth communication between your systems. You get clean code, dependable performance, and timely delivery tailored to your needs. Ready to fix your API challenges? Send me a message, and let's discuss your project.

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