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Pierre Bossetti

Services

End-to-End Tracking Infrastructure for SMEs

Tracking is not a pile of marketing plugins. It is one data pipeline, from the browser DOM to your executive dashboard. Clean data in. Profitable decisions out.

Method

The 4-phase engineering framework

Every engagement follows the same software engineering process. No guesswork. No tag soup.

  1. phase_1

    Phase 1: Diagnostic & Debt Elimination

    I audit zombie events and remove orphan tags. You stop counting conversions that never happened.

    Cleaner numbers. A lighter site.

  2. phase_2

    Phase 2: Native Client Instrumentation

    Vanilla JS and CustomEvents, decoupled from your UI. I protect the main thread and keep INP under 200 ms.

    Tracking that survives a redesign and never slows a page.

  3. phase_3

    Phase 3: Server-Side Pipeline

    First-party cookies and a first-party endpoint, with Cloudflare Zaraz or sGTM. Ad-blockers lose their grip.

    More conversions reach Google Ads and Meta. Your CAC drops.

  4. phase_4

    Phase 4: Decision Intelligence

    BigQuery data pipelines feed instant Looker Studio dashboards for executives.

    Fast decisions. History kept for good.

Comparison

Tracking engineer vs. typical marketing agency

The difference is not the tools. It is how the tracking is built, and who owns it afterwards.

The agency way

  • Plugin stacks
  • Fragile CSS class scraping
  • Bloated bundles
  • Slow pages
  • Recurring retainer lock-in

The engineer way

  • Clean vanilla JS
  • Decoupled application events
  • Sub-200 ms INP
  • 100% data ownership
  • Audit-ready documentation

Services

Four service pillars

Buy one pillar or the full pipeline. Each one stands alone and plugs into the others.

Tagging Plan & Audit

dataLayer

Pain solved. Your GA4 sales never match your CRM. Duplicate events and lost referrals poison your reports and your ad bidding.

Deliverables

  • Event specification sheet
  • Zombie event and orphan tag report
  • CustomEvent + dataLayer tracking plan
  • GA4 vs CRM reconciliation

Server-Side Tracking

Cloudflare Zaraz

Pain solved. Ad-blockers and Apple ITP hide your conversions. Your ad algorithms starve and your CAC climbs.

Deliverables

  • First-party endpoint (Zaraz or sGTM)
  • Web Crypto SHA-256 pipeline
  • Meta CAPI and Google Ads server events
  • Longer-lived first-party cookies

GA4 & Looker Studio Dashboards

gtag.js

Pain solved. GA4 is too complex for daily decisions. Old agency debt hides your true CAC and ROAS.

Deliverables

  • Native gtag.js events tied to backend success
  • SQL-powered BigQuery models
  • Executive Looker Studio dashboard
  • Raw data kept past 14 months

Cookie Consent & Consent Mode v2

Consent Mode v2

Pain solved. Your banner cut traffic data by 30% to 50%, or it blocks nothing and exposes you to fines.

Deliverables

  • tarteaucitron.js zero-lockin setup
  • Four-signal Consent Mode v2 wiring
  • Script blocking until consent
  • Race-condition-free default and update