08/06/2026 updated
100 % available
C#/.NET Developer | Enterprise Application Support | SQL Server, Powershell & IIS
Alverca, Portugal
Only remote
Programming TechnicianAbout me
C#/.NET developer with nearly 7 years of experience in enterprise software, application support and production troubleshooting. Skilled in SQL Server, Powershell, IIS, REST integrations, deployments, upgrades and data migration. Based in Portugal, working remotely in English and Portuguese.
GitHub ActionsTesting (Software).NET FrameworkApplication TestingC Sharp (Programming Language)Data MigrationFunctional TestingInternet Information Services (IIS)Manual TestingMicrosoft Visual StudioMicrosoft SQL ServersWindows PowerShellSoftware MaintenanceMicrosoft SharePointSmoke Testing
C# / .NET FRAMEWORK
Nearly 7 years of professional experience developing, maintaining and supporting enterprise applications built with C# and .NET Framework. Experienced in understanding existing codebases, reproducing defects, implementing bug fixes and delivering customer-requested enhancements.
APPLICATION SUPPORT AND TROUBLESHOOTING
Strong experience investigatin customer reported production incidents across application, database, integration and deployment layers. Skilled in reproducing issues, analysing application behaviour, identifying root causes and delivering practical technical resolutions.
FUNCTIONAL TESTING AND APPLICATION VALIDATION
Experience performing functional and manual testing of enterprise applications after bug fixes, enhancements, deployments, upgrades and data migrations. This includes validating expected behaviour, reproducing business scenarios, checking affected workflows, performing regression and smoke testing and confirming that delivered changes operate correctly.
SQL SERVER
Professional experience with SQL Server, SQL queries and stored procedures supporting application functionality, reporting, troubleshooting, data processing and controlled migration activities.
POWERSHELL
Experience using PowerShell to support application operations, upgrades, data movement between product versions and repeatable processes in SharePoint based environments.
MICROSOFT IIS
Experience installing, configuring, deploying and upgrading enterprise web applications in customer IIS environments. Familiar with validating application behaviour and configuration after deployments and version upgrades.
REST APIS AND SYSTEM INTEGRATION
Experience maintaining and adapting existing web service and REST API functionality connecting enterprise applications with external systems. Familiar with JSON payloads, integration troubleshooting and communication validation between systems.
SHAREPOINT
Experience supporting and maintaining a legacy enterprise web application built on SharePoint and hosted through Microsoft IIS. Focused primarily on custom application functionality, troubleshooting, upgrades and product support rather than general Microsoft 365 administration.
SOFTWARE UPGRADES AND DATA MIGRATION
Experience supporting product version upgrades and moving customer data between application versions using controlled application and PowerShell based processes. Responsabilities include validating application behaviour and data integrity after migration.
CUSTOMER-FACING TECHNICAL SUPPORT
Experience working directly with customer in English and Portuguese to clarify incidents and requirements, explaing technical findings and coordinate practical solutions.
TOOLS AND TECHNOLOGIES
C#, .NET Framework, SQL, SQL Server, stored procedures, PowerShell, SharePoint, Microsoft IIS, REST APIs, web services, JSON, GIT and Visual Studio.
Experience
Professional experience5 - 10 years
Freelancer since2025
Languages
EnglishFluentPortugueseNative speaker
Project history
Development, maintenance and technical support of an enterprise governance application used to manage formal decision-making processes, including proposals, approvals, meetings, voting and decision tracking.
My responsabilities include investigating customer reported production incidentes, reproducing application issues, analysing application and database behaviour, itendifying root causes and delivering technical resolutions.
I also design and implement customer requested enhacements in C#, develop and maintain SQL server queries and stored procedures, support existing web service REST API integrations, and assist with application deployments, configuration and upgrades in Microsoft IIS.
Additional responsabilities include supporting version upgrades and customer data migrations, validating application behaviour and data integrity, communicating directly with customers to clarify requirements, explain technical findings and coordinate practical solutions