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Fiverr Pro
English
$
USD
I will develop or repair csharp dotnet backend systems
James M
About this gig
I build and fix C#/.NET backends, REST APIs, and microservices with clean, reliable engineering. If your backend is slow, broken, missing features, or needs a full rebuild, I deliver stable, maintainable code that fits your system instead of fighting it.
I handle everything from quick bug fixes and new API endpoints to full backend builds with proper structure and solid integrations. Regardless of the package, you will get clear communication, quick turnaround, and code thats straightforward to work with adhering to SOLID principles. Everything is built to be understood, maintained, and extended without issue.
Im also happy to include comprehensive unit tests, either as an add on for smaller tasks or as part of the more advanced packages where full coverage makes sense.
Whether you need a small fix, a new feature, or a complete backend system, I'm looking forward to working with you!
Get to know James M
James M
Senior C Sharp Dot Net Core and Game Development Engineer
- FromUnited Kingdom
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English
I’m a senior C#/.NET Core and game development engineer with years of experience delivering production systems, REST APIs, microservices, database integrations and cloud services including Redis and Firestore. I’m also highly experienced in building commercial Unity and MonoGame features, tools and subsystems with clean, maintainable code.
On Fiverr I work with clear requirements, reliable communication and fast delivery. If you need help choosing the right approach, feel free to get in touch!
FAQ
What do you need from me to get started?
A clear description of the issue or feature, access to the relevant code, and any API keys or environment details. If you’re unsure, send what you have and I’ll tell you what’s missing. Oh... and obviously the repo!
What do I do if my work doesn't really fit under any of the tiers?
Give me a message and we can work out what tier it fits under and how I can best help you!
What counts as a "Quick fix"?
A single, well‑defined backend/API issue. Examples: broken endpoint, small logic error, failing integration. Anything larger belongs in Feature Build or Full Backend. If you are unsure where the issue belongs, I am happy to help to work with you.
Do you work with Entity Framework, SQL, or database migrations?
Yes, but only in the Standard and Premium packages. Basic fixes don’t include DB work.
Can you add new API endpoints?
Yes. New endpoints, modules, or integrations are part of the Feature Build package.
Will you refactor my existing backend?
Yes, but only in Feature build or Full backend tiers. Refactoring is normally not a quick fix unless we can pre-determine it as so.
Do you provide documentation?
All new code, regardless of package will have comments and summaries describing what is going on. Otherwise full documentation is reserved for the Full Backend tier where applicable.
