We're Not an Agency.
We're Your Data Infrastructure Team.
Small Team. Deep Expertise. Real Business Transformation.
Tired of junior staff learning on your dime?
TagSpecialist is a boutique consultancy founded by Lead Data Engineers who got tired of watching generalist agencies fumble complex implementations.
No account managers. No middlemen.
Just senior specialists who build enterprise-grade data infrastructure and actually know how to make GTM, BigQuery, and server-side tracking work together.
"When you work with us, you get us."
Trusted By Brands Managing
$50M+ In Annual Ad Spend
Technical Arsenal
BigQuery Architecture & SQL Engineering
Python ETL Development
Google Cloud Platform
GA4 & GTM (Client-Side + Server-Side)
Conversion APIs (Meta, TikTok, LinkedIn, Pinterest)
Custom Event Tracking & Attribution Modeling
LangChain, LLMs & AI Automation Systems
Shopify Data Pipelines & CRM Integration
Cross-Channel Performance Data Unification (The Single Source of Truth)
Clean•Powerful•Credible