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I will fix bugs in your csharp and dotnet web app
Shafiur Miju
Level 1
About this gig
DotNet Bug Fixing | CSharp Bug Fixing | ASPNET Core Debugging
Is your C# or .NET web app crashing, throwing errors, or acting in ways you cannot explain? I find the root cause and fix it, so your app runs reliably again. Think of me as the software developer you call for software debugging.
No technical knowledge needed. Send me the error message or describe what goes wrong, and I will handle the rest.
WHAT YOU GET:
- Root cause found and bug fixed
- Fix tested before delivery
- Login, API and database errors covered
- Slow SQL Server queries sped up
- Clear note on what broke and why
- Clean code changes you can review
HOW IT WORKS:
1. You share the code and the problem
2. I reproduce it and give a price
3. I fix it and show you the result
4. You test it and ask for changes
GOOD FOR: Business owners, startups, agencies and teams without a .NET developer.
I have 3+ years of experience on ASP.NET Core, Web API and MSSQL business systems. I also fix bugs in Node.js, Express.js, Next.js and Supabase apps.
Message me before ordering. Send the error and I tell you the cause, a fair price and the timeline. Bigger projects are available as custom offers.
Get to know Shafiur Miju
Shafiur Miju
DOT NET, Backend Engineer, Csharp, ASP NET Core APIs and Enterprise Architecture
Level 1
- FromBangladesh
- Member sinceJul 2026
- Avg. response time1 hour
- Last delivery4 weeks
Languages
Bengali, English
I build reliable backend systems for enterprise applications. I develop scalable backend architecture using C# and .NET, high-performance REST APIs with .NET Core, and robust ASP.NET applications. I focus on secure, maintainable systems with clean architecture, authentication, and performance that holds up under real-world load. You get well-structured code, documentation, and clear communication.
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FAQ
What information do you need to start fixing my web app bug?
The error message or a clear description, the steps that cause it, and the relevant code. Screenshots or a short screen recording help.
Which technologies do you work with on a web app?
C#, ASP.NET Core, Web API, SQL Server, Blazor, Bootstrap and jQuery. I also fix bugs in Node.js, Express.js, Next.js and Supabase apps.
Do I need to give you the full source code of my web app?
Not always. The error and the relevant files are often enough. If the cause sits elsewhere, I tell you what else I need.
How do I know which package to choose?
Send me the error first. I tell you the cause, a fair price and the timeline, and then I point you to the package that fits your web app.
What if you cannot fix my web app bug?
I tell you honestly after I investigate. Message me before ordering and we agree what is possible, so there are no surprises.
Will you explain what caused the problem?
Yes. Every fix comes with a clear note on what broke and why, so your software developer or team can learn from it.
Can you fix slow performance or slow database queries?
Yes. I speed up slow SQL Server queries and look for the cause of slow pages in your web app. The Premium package adds a performance check.
Can you fix bugs in an old .NET Framework web app?
Often yes. Message me a short description of the app and the error, and I confirm before you order.
Do you test the web app fix before delivering it?
Yes. I test the fix before delivery and show you the result, then you test it and ask for changes.
Can I message you before placing an order?
Yes, and I recommend it. Send the error, and I reply with the cause, a fair price and the timeline for your web app.
