Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop, fix, or enhance your dot net application
Hanz
About this gig
Need an experienced C#/.NET developer to build, fix, or improve your application?
Im a Senior Software Engineer with 10+ years of experience developing enterprise-grade software using C#, .NET, ASP.NET Core, Web API, WPF, SQL Server, and Azure.
I can help with:
C# and .NET development
ASP.NET Core & REST APIs
WPF/MVVM applications
Bug fixing & troubleshooting
SQL Server queries and optimization
Third-party API integrations
Existing application enhancements
Authentication and secure development
I focus on clean, maintainable, secure, and reliable solutions.
Please contact me before ordering so I can review your requirements and recommend the right approach.
Get to know Hanz
Hanz
Senior Software Engineer
- FromUnited Kingdom
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English
Senior Software Engineer with 10+ years of experience building secure, reliable, and scalable applications using C#, .NET, ASP.NET Core, WPF, Web APIs, SQL Server, and Azure. I specialize in enterprise applications, REST APIs, integrations, database solutions, debugging, and performance optimization. I have extensive experience in financial and regulated environments, delivering maintainable solutions with a strong focus on security, data integrity, and quality.
FAQ
Can you work with an existing C#/.NET application?
Yes. I can investigate, debug, modify, and enhance existing C#/.NET applications. Please provide the relevant source code and details of the required changes.
Can you develop a new .NET application?
Yes. I can develop new software components and applications using technologies such as C#, .NET, ASP.NET Core, Web API, WPF, and SQL Server. Please contact me first to discuss larger projects.
Can you fix bugs in my C# application?
Yes. I can investigate errors, debug the application, identify the underlying cause, implement a fix, and perform appropriate testing.
Can you work with SQL Server?
Yes. I have extensive experience with SQL Server, including queries, data manipulation, database development, troubleshooting, and performance analysis.
Can you integrate a third-party API?
Yes. I can develop REST API integrations and connect .NET applications with third-party services. Please provide the API documentation when contacting me.
Can you work with confidential or business applications?
Yes. I have experience working with enterprise and regulated financial systems where security, confidentiality, data integrity, and controlled development practices are important.
