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I will integrate rest apis into your csharp or nextjs application
Patrick S.
About this gig
Need an API wired up properly? I'll integrate it cleanly and fast.
I'm a senior web developer with 9+ years of corporate experience integrating REST APIs into C#/.NET and Next.js applications. I've worked on enterprise production systems where reliable API connections are critical to business operations.
WHAT I CAN INTEGRATE
- Third party REST APIs into your C# or Next.js app
- Payment APIs - Stripe, PayPal and others Authentication APIs
- OAuth, JWT, Azure AD Cloud service APIs
- Azure, AWS, Google Cloud Custom internal APIs between your own services Database connections and data mapping
HOW IT WORKS
- Share your API documentation and codebase
- I confirm scope and approach before you order
- I integrate cleanly with full error handling
- You receive working code with clear explanation
WHY CHOOSE ME
- 9+ years corporate experience with enterprise APIs
- I handle auth, error handling and edge cases properly
- Clean, maintainable code your team can work with
- Honest about scope before you spend anything
Message me before ordering - I'll review your requirements and confirm I can deliver before you commit.
Get to know Patrick S.
Patrick S.
Senior Full Stack Developer in NET Angular and Nextjs
- FromPhilippines
- Member sinceJun 2026
Languages
Tagalog, English
Senior web developer with 9+ years of corporate experience in C#/.NET, Angular, Next.js, and Azure DevOps.
I've worked on enterprise production systems where quality and deadlines matter. I fix bugs, build features, and integrate APIs — clean code, clear communication, fast delivery.
New to Fiverr, not to development. You get nearly a decade of corporate experience at starter rates.
Message me before ordering — I'll confirm I can help before you spend anything.
FAQ
What do I need to provide to get started?
Your API documentation or endpoint details, access to your codebase via GitHub or zip file, and a description of what you need the integration to do.
Which APIs have you worked with before?
Payment APIs like Stripe and PayPal, authentication APIs like OAuth and Azure AD, cloud APIs like Azure and AWS, and many custom REST APIs built in corporate environments.
Do you handle authentication and error handling?
Yes, all integrations include proper error handling. Authentication setup like OAuth, JWT and Azure AD is included in Standard and Premium packages.
Can you integrate APIs into an existing codebase?
Yes, this is my specialty. I have 9+ years working with existing enterprise codebases so I understand how to integrate cleanly without breaking existing functionality.
What if the API has no documentation?
Message me first and share what you have. I can often work with partial documentation or by inspecting API responses directly. I will always confirm feasibility before you order.
