$ whoami --status=open_to_work

Digital Analyst focused on analytics implementation with public proof.

Almost 5 years implementing and auditing tracking with GA4, web and server-side GTM, Consent Mode v2 and BigQuery, on enterprise accounts via an agency. Looking to join a digital analytics or MarTech team as a Digital Analyst / Analytics Implementation Specialist.

$ view_cv view --case-studies

✓ Code and docs are public on GitHub.

proof.sh — cristhian

$ ./verify --public-proof

Own server-side GTM on Cloud Run (this site)...

✓ IN PRODUCTION — sgtm.cristhianvelasquez.com

dbt model GA4 → BigQuery...

✓ 25/25 tests — CI on GitHub Actions

Consent audit (personal data)...

✓ ROOT CAUSE found — see case 1

$ _

$ cat ./proof.log

proof.sh — cristhian

$ ./verify --public-proof

Own server-side GTM on Cloud Run (this site)...

✓ IN PRODUCTION — sgtm.cristhianvelasquez.com

dbt model GA4 → BigQuery...

✓ 25/25 tests — CI on GitHub Actions

Consent audit (personal data)...

✓ ROOT CAUSE found — see case 1

$ _

REAL CASES

Real diagnostics, with root cause and a number.

Five diagnostics delivered via digital marketing agencies, with the end client anonymized for confidentiality, and three projects of my own.

Legal risk / GDPR

Fashion e-commerce (DTC)

Personal data leak in server-side tracking

The server-side container was sending email, name, country, and zip code to Meta CAPI, TikTok Events API, and Google Ads even when ad consent had been denied.

Scaled architecture

Hospitality / Travel

GTM container migration at scale

Data discrepancies between properties after migrating GA4 e-commerce events from one container to another.

Before / After

Cosmetics (PrestaShop)

E-commerce dataLayer audit

Every GA4 e-commerce event failing in staging, before going live.

BigQuery / SQL

Paid Search (multi-sector)

Reconciling a Google Ads vs. GA4 discrepancy via BigQuery

Google Ads reported ~34% more purchase conversions than GA4 for the same period and channel, with no clue as to why in the dashboard.

dbt / BigQuery

Technical portfolio, Analytics Engineering

Dimensional GA4-in-BigQuery model built with dbt

The native GA4-to-BigQuery export isn’t an analytical table, it’s a nested event log: every query re-writes the same UNNEST and carries the risk of double-counting purchases.

Server-side tagging

Own consulting practice, applied to cristhianvelasquez.com

A self-hosted tagging server on Cloud Run, no Stape

The site measured everything client-side: with no server-side layer, GA4 hits were exposed to blockers, ITP, and third-party cookies, and there was no way to prove the skill without a client asking for it first.

View all case studies →