Expert Needed for Advanced Tracking Setup

We are looking for a highly experienced specialist in Google Tag Manager, server-side tracking, and performance measurement to completely restructure our tracking setup and ensure maximum data accuracy and conversion tracking.

Currently, we have a basic tracking setup and are facing several issues, such as:
• Incomplete event tracking (only Purchase is being tracked)
• Misconfigured Google Ads Dynamic Remarketing tags
• No cross-domain tracking across domains/subdomains
• Underreporting of sales in GA4
• Low match quality in Meta Pixel/Conversions API
• Inaccurate tracking for TikTok Ads

Objective:
Set up a reliable and advanced tracking system focused on performance, precise attribution, and support for paid media strategies.

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Technical Requirements:
- Full manual implementation via Google Tag Manager (GTM)
- Server-side tracking setup for:
• Google Ads
• GA4
• Meta (Facebook/Instagram)
• TikTok Ads

- Configuration of the following custom events (macro and micro conversions):
• Add to Cart
• View Cart
• Begin Checkout
• Add Payment Info
• Phone Clicks
• Email Clicks
• Scroll Depth
• Time on Site
• Lead Form Submission
• Purchases

- Fix and implement Google Dynamic Remarketing tags
- Enable and configure cross-domain tracking
- Improve match quality for Meta Pixel & Conversions API
- Extend cookie lifetime (first-party tracking)
- Full documentation of the setup for future maintenance

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Nice to Have:
• Experience with e-commerce or multi-domain environments
• Ability to compare GA4 data with backend for discrepancies
• Clear communication skills to explain technical decisions
• Strong commitment to deadlines and quality

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If you’re an expert in digital performance tracking, advanced data measurement, and result-driven tracking setups, this project is for you.

Please send your portfolio, relevant case studies, and a brief action plan for this implementation.