Browse categories
Explore
Fiverr Pro
English
$
USD
I will maintain and troubleshoot your legacy asp net webforms app
Biubiu.Harvey
About this gig
Are you struggling with an older ASP.NET WebForms application? I specialize in maintaining, fixing, and optimizing legacy .NET systems. Unlike generic developers, I understand the complexities of ViewState, PostBacks, and older architecture patterns. Whether you need a quick bug fix, a performance boost, or a new feature added to your existing system, I can help you get it done safely without breaking existing functionality.
What I can do for you:
- Bug Fixing: Resolving runtime errors, logic issues, and CSS/UI glitches.
- Optimization: Improving page load speeds and database query performance.
- Feature Enhancement: Adding new modules or functionalities to existing pages.
- Maintenance: Updating deprecated libraries or fixing security vulnerabilities.
Why choose me?
- Expertise in Legacy Code: I am comfortable navigating complex, older codebases that others might find difficult.
- Safe Modifications: I prioritize stability and ensure that new changes do not negatively impact current operations.
- Clear Communication: I explain technical issues simply so you always know the status of your project.
Please contact me before placing an order so we can discuss your specific requirements!
Respect third-party rights
Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.
Get to know Biubiu.Harvey
Biubiu.Harvey
Senior Software Engineer, Custom Solutions
- FromChina
- Member sinceMay 2026
Languages
Chinese, English
I turn complex business needs into stable, scalable software. Expert in legacy system upgrades (WebForm/WPF) and modern .NET Core development.
✅ Why hire me?
• Reliable: On-time delivery, clean code.
• Versatile: Full-stack (Vue.js) & Cross-platform (C#/Java/Python).
• Cutting-edge: Hands-on AI Integration with Semantic Kernel.
From university systems to AI apps, I provide top-tier tech solutions. Let's discuss your project! 🚀
FAQ
Do I need to provide the full source code and database access?
Yes, to fix bugs or add features efficiently, I will need access to the Visual Studio solution files and, if necessary, a backup of your SQL Server database. If you have sensitive data, please sanitize it before sharing.
Can you work on .NET Core or Blazor projects as well?
This specific Gig is focused on legacy ASP.NET WebForms (.aspx). If you have a project in .NET Core, MVC, or Blazor, please contact me first so I can send you a custom offer tailored to that technology stack.
My code is very old and undocumented. Can you still help?
Absolutely. I specialize in reading and understanding older, complex codebases. I am comfortable navigating spaghetti code and lack of documentation. Just describe the issue, and I'll do the investigation.
Do you provide deployment support or access my server directly?
For security and time zone reasons, I do not access client servers directly. However, I provide a clear deployment guide/documentation starting from the Standard Package. If you just need quick instructions, feel free to message me, and I will happily provide simple steps via chat!
