Hi Sir/Madam,
I have been working at Sharepoint for 7 years. I have experience with SharePoint installation, configuration, development, migration, and integration with 3rd party tools.
I worked with Sharepoint Online and On-premise( 2007, 2010, 2013, 2016, 2019). I developed lots of modules like audit management, document management, skill management, and meeting management. I devrloped intranet, extranet and web portals. I can develop web parts, custom layouts& masterpages, workflows, timer jobs, event receivers etc. I can develop the workflows with Sharepoint Designer, MS Flow, Visual Studio, Sparks and Nintex. I can develop mobile apps via PowerApps on the Sharepoint(Office 365). I can migrate the SharePoint between 2007 and 2019 versions via Powershell or I can migrate the Sharepoint via Sharegate. I migrated the Sharepoint 2003 to 2013 via ShareGate before. I developed lots of Sharepoint Intranet, extranet and web site with Sharepoint. You can check my guru profile. I can make the troubleshooting for your SharePoint versions.