08/22/2026 updated
100 % available
Senior C# / .NET Developer | SQL Server & Database Specialist
Tehran, Iran
Only remote
C (Programming Language)Android (Software)HTML5Bootstrap (Software)C Sharp (Programming Language)Mobile Application SoftwareWindows MobileSQL InjectionSQL DatabasesSql Database Administration
C# / .NET Development
Design and development of business applications, backend services, APIs, maintenance and feature development using C#, .NET and ASP.NET across Web, Windows and Mobile platforms.
SQL Server & Database Development
Database design, stored procedures, complex queries, joins, performance troubleshooting, data management and administration with SQL Server.
Web Application Development
Development and maintenance of web-based business applications using the Microsoft/.NET ecosystem, including ASP.NET and related technologies.
Windows Application Development
Development and maintenance of Windows desktop applications as part of long-term software projects.
Mobile Application Development
Development and maintenance of mobile applications integrated into broader .NET-based software solutions.
Database Administration
Administration and management of databases, including performance optimization, data modeling and query optimization.
API / Backend Development
Design and implementation of backend services and APIs using the .NET technology stack.
Bug Fixing & Maintenance
Troubleshooting and enhancement of existing software, fixing production issues, debugging and implementing requested changes in legacy and modern codebases.
Legacy Code Analysis
Fast understanding of existing codebases, analysis of legacy systems and reliable integration of new features into established projects.
Business / Inventory Systems
Development of business and inventory management systems with database-driven workflows and long-term maintainability.
Design and development of business applications, backend services, APIs, maintenance and feature development using C#, .NET and ASP.NET across Web, Windows and Mobile platforms.
SQL Server & Database Development
Database design, stored procedures, complex queries, joins, performance troubleshooting, data management and administration with SQL Server.
Web Application Development
Development and maintenance of web-based business applications using the Microsoft/.NET ecosystem, including ASP.NET and related technologies.
Windows Application Development
Development and maintenance of Windows desktop applications as part of long-term software projects.
Mobile Application Development
Development and maintenance of mobile applications integrated into broader .NET-based software solutions.
Database Administration
Administration and management of databases, including performance optimization, data modeling and query optimization.
API / Backend Development
Design and implementation of backend services and APIs using the .NET technology stack.
Bug Fixing & Maintenance
Troubleshooting and enhancement of existing software, fixing production issues, debugging and implementing requested changes in legacy and modern codebases.
Legacy Code Analysis
Fast understanding of existing codebases, analysis of legacy systems and reliable integration of new features into established projects.
Business / Inventory Systems
Development of business and inventory management systems with database-driven workflows and long-term maintainability.
Experience
Professional experience10+ years
Freelancer since2010
Languages
EnglishGoodPersianNative speakerTurkishGood
Project history
Building, maintaining and troubleshooting business applications across Web, Windows and Mobile platforms. Work includes database design, SQL development, query optimization, database administration, API/backend development, bug fixing and legacy code analysis. Projects include business and inventory management systems, .NET-based web and Windows applications, and database-heavy applications involving SQL Server development, data modeling, stored procedures and query optimization.