3 Websites Migration, Google Tracking Setup & Full A–Z Testing

I am looking for an experienced developer to help migrate 3 existing websites/domains from our old projects to new projects and make sure everything continues working perfectly before and after the migration.

The work includes:

* Move/connect the existing domains from the old projects to the new projects
* Configure DNS, SSL and all required domain settings
* Make sure there is no unnecessary downtime during migration
* Set up Google Search Console for each website/domain
* Set up Google Tag Manager for each website
* Set up Google Analytics 4 for each website
* Configure and verify the required conversion/event tracking
* Make sure the tracking can later be used correctly with Google Ads
* Replace/update several images and backgrounds inside the admin sections so that the visual assets are original and clearly differentiated
* Check integrations, APIs, forms, buttons, authentication, admin functionality and all important user flows
* Test each website completely A–Z before migration
* Test everything again after the domain migration
* Verify that all existing functionality works exactly as it does now
* Identify and fix any issues caused by the migration
* Verify the websites on both desktop and mobile

**Important access limitation:**

I will NOT provide access to my Vercel account.

For any Vercel-related configuration, I will provide screenshots of the relevant settings/pages. You will review the screenshots and tell me exactly what I need to change, add or remove, step by step, and I will make the changes myself.

Please take this into account before applying.

The migration must not break any existing functionality.

Before completing the job, I want a final QA check covering the complete customer flow, admin flow, analytics/tracking and all critical integrations.

Please apply only if you have strong experience with website/domain migrations, DNS, Google Tag Manager, GA4, Google Search Console and technical QA.

When applying, please briefly describe similar migrations/tracking setups you have completed before.