Upgrade Umbraco website version from 7.7.6 to 8.16

We are urgently looking for a Umbraco programmer, Must have good experience in the Umbraco platform. Job Description: - Update the current Umbraco website version 7.7.6 to its latest version 8.16 - Update uStarterCategoryPicker - Update uStarter grid layout to Umbraco 8 grid layout - Update other uStarter controls - Update nested content archetype controls to umbraco nested content - Update archetype other controls - Update umbraco 7 document types to v8 - Update backoffice packages - Prepare test environment, deployments of solution - Need to ensure the new version works absolutely fine with currently uploaded & working plugins, APIs, codes etc. - Need to cross-check everything should work fine at the backend & frontend including all the redirected links & so on. - Migrate content between v7 and v8 (create migration procedure for each updated control (like archetype, uStarter) - Project management & QA to check each & every page works properly