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Fiverr Pro
English
$
USD
I will build a secure rest API for your web or mobile app
Rahul G
About this gig
Need a reliable backend for your web or mobile app? I build clean, secure, scalable REST APIs using ASP.NET Core and C#, backed by 12+ years of enterprise development experience across fintech, healthcare, and cybersecurity projects.
New to Fiverr, but not new to development, bringing enterprise-level quality at a fraction of agency pricing.
What I offer:
RESTful API design following best practices
JWT/OAuth authentication & role-based access
Entity Framework Core with SQL Server
Swagger/OpenAPI documentation
Clean, layered architecture
Error handling, logging, input validation
Whether you need a new API from scratch or help fixing/extending an existing ASP.NET Core project, I can help from startup MVPs to production-ready backends.
Why work with me:
12+ years hands-on .NET development
Experience in regulated industries (fintech, healthcare)
Clear communication, no unnecessary jargon
Clean, documented code, easy to hand off
Quick responses, regular updates
Not sure what you need? Message me before ordering; I'll help you scope it.
Get to know Rahul G
Rahul G
Senior Full Stack NET Developer
- FromIndia
- Member sinceJun 2026
- Avg. response time1 hour
Languages
Hindi, English
I am a Senior .NET Developer and Tech Lead with over 12 years of experience designing enterprise-grade web, API, desktop, and mobile applications. I specialize in C#, ASP.NET Core, ASP.NET MVC, SQL Server, and Flutter, with a proven track record across ERP, e-commerce, healthcare, and cybersecurity domains — including live payment platforms for a UK fintech client and a production ransomware detection system.
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Other Software Development Services I Offer
FAQ
Do you provide the source code?
Yes, you get full, unrestricted access to the source code for everything I build. It's yours to modify, extend, or hand off to another developer.
Can you work with my existing codebase, or only build from scratch?
Both. I can build a new API from scratch or extend/fix an existing ASP.NET Core project. Just share your repo or code files in the requirements, and I'll review the scope before starting.
What do you need from me to get started?
A brief description of what the API should do (endpoints, data it manages, any third-party integrations), and your preferred database if you already have one. If you're not sure, I can help figure out the right structure.
Do you offer support after delivery?
Yes — minor bug fixes related to the delivered work are covered during the revision period. For ongoing support or new features afterward, we can discuss a separate arrangement.
Can you deploy the API for me, or do I need to do that myself?
I can deploy to Azure, AWS, or another host as an add-on (see extra services), or hand off deployment-ready code with instructions if you'd rather deploy it yourself.
