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First-Party Data Architecture & Ad Growth Engineering

Stop paying Meta & Google for cheap leads that never close.

I engineer first-party, server-side tracking pipelines and closed-loop CRM connections that train your ad algorithms to find qualified, ready-to-book buyers, not junk form spam. Already running Conversion API or Enhanced Conversions? It is almost certainly leaking, and that is exactly what I fix.

Sourav Hasan, First-Party Data Architect
Sourav Hasan
First-Party Data Architect
Available
Built on
Google Ads Stape
🎯
9.3 / 10
Event Match Quality
GDPR
GDPR
Compliant by design
Trusted by 🏢Performance agencies 💚Health & wellness 📈B2B businesses SaaS lead generation 📍Local businesses 🩺Doctors & clinics Trusted by 🏢Performance agencies 💚Health & wellness 📈B2B businesses SaaS lead generation 📍Local businesses 🩺Doctors & clinics
Why your ads underperform

Your ad budget is real. Your conversion data is not.

💸

You spend, but the leads don't buy.

Form fills look good in the dashboard. But most of them never become paying customers. Your platforms keep finding the same low quality audience because that is what your tracking is teaching them.

📉

ROAS looks great. Revenue does not match.

Meta claims one number. Google claims another. Your bank account tells a third story. Without accurate Conversion API and offline tracking, you cannot trust any of them.

📵

iOS, ad blockers, and browsers are hiding your buyers.

Standard pixels miss 30 to 50 percent of conversions. The algorithm trains on what it can see, which is the wrong half of your customers. Your campaigns scale the wrong audience.

Already set up CAPI? Read this.

Your ad campaigns are running blind.

Most businesses I work with already have Conversion API and Google Enhanced Conversions installed. The problem is not whether it exists, it is whether the signal survives. Client-side browser tracking still leaks up to 30% of your marketing data to ad blockers, Safari ITP, and iOS limits. A pixel that fires is not the same as an event that lands.

🧱
What most setups still run on
The Vulnerable Browser Pipeline

Third-party scripts. Heavy JavaScript loads kill your Core Web Vitals and quietly drag down landing-page conversion rates.

ITP & cookie decay. Safari purges first-party tracking cookies within 7 days, shattering long-term attribution and remarketing windows.

Data scraping. Unhashed PII sits exposed in the DOM, vulnerable to competitors and malicious browser extensions.

🛡️
What I build instead
The Server-Proxy Fortress

Single clean stream. One streamlined request to your own custom subdomain proxy, drastically lower page latency and far fewer dropped events.

Extended identity. Server-set cookies push visitor attribution out to 400 days, mapping the full buyer journey instead of a 7-day window.

Absolute governance. PII is hashed server-side with SHA-256 and routed cleanly to Meta and Google with no browser intervention.

If your EMQ sits below 9, your match rate is mediocre, or Meta and Google disagree with your CRM, your CAPI is broken, even if it looks installed. That gap is where your budget leaks, and it is exactly what a free audit reveals.

The architecture

Engineered signal infrastructure.

A modular, compliant, and hyper-accurate stack built for modern privacy constraints. This is the fortress, four pillars that replace the leaking browser pipeline.

01
🌐

Server-Side Tagging Proxy

Bypasses browser tracking limits, drastically lightens client-side load, and routes data securely through a custom subdomain that ad blockers cannot intercept.

02
🔑

First-Party Identity Resolution

Safari origin cookie extension up to 400 days. Secure client stitching and cookie-keeper protocols maintain a persistent, accurate user identity across sessions.

03
⚖️

Consent Mode v2 & Privacy

Rigorous GDPR and CCPA-compliant setups. Automated server-side PII stripping, SHA-256 hashing, and data minimization before anything is dispatched to a network.

04
🔁

Closed-Loop CRM Sync

Direct Conversion APIs pass offline pipeline milestones like MQL, SQL, and Won from HubSpot or Salesforce back to Google and Meta ad engines automatically.

Algorithmic math

The mathematics of ad learning loops.

Smart Bidding and Advantage+ run on signal volume and matching identifiers. Move event delivery from the fragile browser to a secure server pipeline and match rates climb, which is what actually stabilizes your cost per acquisition. The theory is simple.

Match-rate efficiency
μmatch = 1 − e−λ·Id

Raising first-party identifier density (Id) drives the match rate up fast. More matched events means the algorithm learns from real people, not anonymized noise, so it starts hunting actual buyers.

Acquisition-cost optimization
CACopt = CACbase· e−α·ΔR

Every point of recovered, deduplicated conversion signal (ΔR) compounds against your baseline cost. Clean signal does not just report better, it pulls your true CAC down over time.

What the leak costs you

Put a number on the signal you are losing.

Industry data puts client-side data loss at roughly a quarter of all traffic. When that signal is recovered and fed back clean, advertisers typically reclaim around 15% in wasted ad efficiency. Calibrated for lead-gen budgets from $1,500/mo upward, move the slider to see what that means at your spend.

Estimate based on ~25% client-side traffic leakage
Recovery modelled at a conservative 15% efficiency gain
Real numbers come from your free audit, not a slider
Signal ROI Calculator
Drag to set your monthly ad spend.
Monthly ad spend $3,000
$1.5k$25k
Estimated monthly signal loss
At ~25% client-side leakage
$750
Recoverable monthly ad waste
Reclaiming 15% efficiency
$450

That is up to $5,400 a year in recoverable spend, typically a multiple of a single fixed-scope sprint.

What I build

A conversion tracking system that actually feeds your algorithm.

Clean signal in. Quality buyers out. That is the entire job.

Meta Pixel + Conversion API

Server side events through Google Tag Manager and Stape.io that survive iOS, ad blockers, and consent rejection. Deduplicated with your pixel for clean, 9+ EMQ signal.

Google Ads Enhanced Conversions

Hashed first party data sent directly to Google Ads through Google Tag Manager + Stape.io. Recovers conversions cookie tracking cannot see and feeds Smart Bidding clean signal.

Offline Conversion Tracking

CRM closed deals, phone sales, and booking confirmations piped back to Meta and Google. The algorithm starts optimizing for real revenue instead of form fills.

Stape.io

Server Side GTM with Stape.io

Your tracking runs through a dedicated Google Tag Manager server container hosted on Stape.io. Cookie lifetime up to 400 days, first party domain, faster page load.

GA4 you can actually trust

Properly configured GA4 with server side data collection, custom events for your business, and reports that match what your CRM is telling you.

GDPR Compliant
CCPA Compliant

Consent Mode v2 & compliance

GDPR, CCPA, and Consent Mode v2 ready from day one. You keep your data, stay compliant in EU and US markets, and avoid platform feature shutoffs.

How I work

The safe migration blueprint.

I do not rip out your live tracking and hope. I build the new system in parallel, validate every event against the old one, and only switch over once the numbers prove out. Your ad accounts keep running the whole time.

🔍
48 hours

Deep audit & schema mapping

Custom data-layer schemas plotted. I pinpoint the exact conversion leaks across your existing tags before touching anything.

🧪
1–2 weeks

sGTM parallel staging

Shadow mode deployed. Server tracking runs alongside your client-side setup so we can test and validate without touching live reporting.

1 week

Match validation

SHA-256 hash keys go live. I monitor the network APIs until Meta Event Match Quality holds at 9.0 or higher.

🚀
24 hours

Client decommissioning

Heavy legacy browser tags safely removed. Page speed recovers instantly and you are fully migrated to the proxy.

Who I work with

Built for businesses that scale on ad spend.

🏢

Performance agencies

Your client retention depends on results. I become your invisible tracking partner so your campaigns run on clean data and your reports show numbers that match reality. Many agencies white label this work into their own offering.

💚

Health & wellness

Your real revenue happens offline. Phone consults, MindBody bookings, package upgrades. I connect your CRM and booking system so Meta and Google optimize for paying clients, not just form fills.

📈

B2B & SaaS lead generation

Form fills are not customers. SQLs and closed deals are. I connect your CRM so closed deals flow back to Meta and Google, and your campaigns start finding buyers instead of time wasters.

📍

Local businesses & clinics

Walk-ins, phone bookings, in-person sales. I tie offline conversions back to your ad platforms so Meta and Google can find real local customers, not curious clicks from the wrong area.

Client success blueprints

When tracking is built right, the platforms do the work for you.

Meta and Google have spent billions training their algorithms. They deliver their best optimization only when they are fed clean, deduplicated signal. Here is how that plays out across the B2B SaaS and health and wellness businesses I work with, first as engineered outcomes, then in real dashboards.

SaaS · B2B Lead Gen
"How a venture-backed SaaS recovered 34% of mismatched CRM conversions and cut CPL by 27%."
+34%
Conversions recovered
−27%
True cost per lead
Context
High-value HubSpot closed-won deals were never piped to the ad algorithms, forcing Google Ads to optimize for raw, unqualified form fills.
What I engineered
A custom server-side GTM to HubSpot offline API mapping using SHA-256 hashing to retroactively match user client IDs to finalized revenue.
Result
Smart Bidding shifted from chasing "Lead" to chasing "Paid Customer", a 27% drop in true customer acquisition cost.
Health & Wellness · GoHighLevel
"A wellness funnel on GoHighLevel that now wins lower-cost leads, and more of them."
Lower
Cost per lead
Higher
Qualified lead volume
Context
The funnel captured opt-ins and booked calls inside GoHighLevel, but Meta and Google only ever saw the top-of-funnel form fill, so the algorithms kept optimizing for cheap, low-intent contacts.
What I engineered
Connected GoHighLevel to the Meta Conversion API and Google offline conversions through server-side GTM, passing booked-appointment and qualified-lead stages back with SHA-256 hashed identifiers.
Result
Once the algorithms could see which leads actually booked, the cost per lead came down and the share of qualified, ready-to-book leads went up.

And here is what clean signal looks like inside the platforms themselves:

Google Ads Google Ads dashboard showing strong conversion rate and tracked spend when Enhanced Conversions are configured properly
4.44%
Conv. rate
34K
Conversions
€15.97
Cost / conv.

Google Ads · Enhanced Conversions

Enhanced Conversions with server-side GTM and Stape feed Smart Bidding clean, hashed first-party data. Cookieless conversions get recovered, match rates climb, and the algorithm starts compounding on its own.

This is what proper Google EC enables
Meta Ads Meta Ads Manager showing lead volume and cost per lead delivered when Conversion API is properly configured
389
Form leads
€3.06
Cost / lead
€0.07
Cost / click

Meta Ads · Conversion API

When CAPI is built through GTM and Stape with 9+ EMQ, lead events survive iOS, ad blockers, and consent rejection. Advantage+ stops guessing and starts finding the audiences that actually convert.

This is what proper Meta CAPI enables
Data governance

The compliance fortress.

Moving measurement to the server does not mean cutting corners on privacy, it means the opposite. You get more control over what leaves your domain, and stricter adherence to GDPR, CCPA, and Consent Mode v2 than any client-side pixel can offer.

🔐

Advanced Consent Mode v2

Configurations read your cookie banner (Cookiebot, Usercentrics, OneTrust). When a visitor declines, the proxy stops transmitting personal data while safely keeping modeled, non-PII diagnostic signals.

🗝️

SHA-256 hashing at the origin

Unlike standard scripts that ship raw text to Meta, the server container anonymizes IPs, strips user agents, and hashes email and phone into secure strings before anything leaves your subdomain.

📄

Signed DPAs & NDAs

Every engagement includes standard Data Processing Agreements and mutual Non-Disclosure Agreements. Your customer logs, client lists, and ad accounts stay legally isolated and strictly secured.

Let's fix your tracking

Get a free audit of your tracking stack.

I review your Pixel, CAPI, GA4, and Enhanced Conversions. Then we get on a quick call so I can walk you through what is broken and how to fix it.

Strategic offerings

Infrastructure sprints.

Fixed-scope, outcome-driven deployments, built specifically for your lead, scheduling, and attribution needs. Every sprint replaces leaking browser tracking with a clean server-side foundation. Start where it hurts most and scale up.

Sprint 01 · Core conversion fix
Performance Booster
$350one-time investment
Delivered in 1 to 3 days

Core conversion setup for a single leaking channel, either Meta Conversion API or Google Enhanced Conversions. Ideal for simpler setups that need one channel fixed cleanly and fast.

What you get
One channel: Meta CAPI or Google Enhanced Conversions
Choose one channel only at this tier
Server-side conversion event setup
GA4 event mapping & QA config
Deduplication verification checks
9+ Event Match Quality on key events
Conditions apply based on data layer and CRM availability
Advanced matching parameters (email, phone, name)
Consent Mode v2 basic compliance
Plain-English event documentation
🛡️ 15 days free management & 15 day money back guarantee
Most popular · best value
Sprint 02 · Proxy infrastructure
Server-Side Proxy
$550one-time investment
Delivered in 3 to 5 days

Full server-side proxy infrastructure for both Meta Ads and Google Ads. A dedicated proxy on your own subdomain that survives Safari ITP, ad blockers, and iOS, the foundation real scaling sits on.

What you get
Everything in the Performance Booster
Both channels: Meta Ads + Google Ads
GTM server container setup (Stape / GCP)
Custom origin-level subdomain DNS
400-day first-party cookie lifetime extension
Advanced Consent Mode v2 configuration
Secure server-side SHA-256 data masking
Lighter client-side load & faster page speed
Plain-English event documentation
🛡️ 15 days free management & 15 day money back guarantee
Sprint 03 · CRM feedback loop
Closed-Loop CRM Sync
$950one-time investment
Delivered in 7 to 10 days

Advanced offline conversion CRM feedback loop. Your database pipeline interfaces directly with ad network graph APIs, so bidding algorithms optimize against real qualified revenue, not raw form fills.

What you get
Everything in the Server-Side Proxy
Direct CRM pipeline integration (GoHighLevel, HubSpot, Salesforce, Pipedrive, or Zoho)
Offline conversions fed back to ad network graph APIs
Value-Based Bidding algorithm setup
Offline MQL, SQL & Won fed back to Meta & Google
Lead-quality scoring sent to ad platforms
Custom audiences built from CRM segments
Conversion values mapped to real revenue
🛡️ 15 days free management & 15 day money back guarantee
For active media buyers & agencies

Agency Retainers & White-Label Sprints

Managing multiple client portfolios? I provide white-label data architecture and ongoing maintenance, keeping every client's signal running at 9+ EMQ, 24/7, under your brand.

Included in every engagement

Deduplicated events, no double counting
Full setup documentation in plain English
Real time event verification before go live
Direct WhatsApp or Slack during the build
No account managers, no hand offs
Tracking that does not break if I leave
About

Hi, I'm Sourav Hasan.

I am a first-party data architect. I build the server-side tracking infrastructure that determines whether Meta and Google find real customers or quietly spend your budget on clicks. For B2B SaaS, health and wellness businesses, agencies, and lead-generation teams, I connect funnels, CRMs, and ad platforms into one clean, compliant signal loop. Most providers stop at installing a pixel. I stay until the data is accurate, the match quality is high, and every campaign is learning from buyers instead of noise.

📊
60+
Tracking systems engineered
🌍
8+
Countries served
🎯
9.3/10
Peak Event Match Quality
🔒
GDPR
Privacy-first by design
Certifications

Trained by the people who built the tools.

Server-side tagging, Google Ads, GTM, and analytics, certified directly by the platforms and academies that set the standard. Click any certificate to view full size.

Stape Academy, Server-side tagging with Stape certificate
Stape Academy
Server-side tagging with Stape
Certified · 29 Sep 2025
Skillupper, Advanced Digital Analytics and Server-side Tracking certificate
Skillupper
Advanced Digital Analytics & Server-side Tracking
Passing grade
Web Analytics Solution, Google Ads OCT Mastery certificate
Web Analytics Solution
Google Ads OCT Mastery
Completed · 18 Jun 2026
Analytics Mania, Google Tag Manager Fundamentals certificate
Analytics Mania
Google Tag Manager Fundamentals
Graduated · 01 Oct 2025
My background

Where I focus.

I am a first-party data architect and ad growth engineer. My work lives in the part of paid advertising most teams ignore until it starts quietly losing money: the signal layer. I make sure your Meta and Google accounts see your real customers, measure them correctly, and use that information to find more buyers like them. I do not just install tags. I build the infrastructure that decides whether your ad spend compounds or leaks.

How I help

Clean data in. Better buyers out.

The flywheel

Most tracking specialists stop at recovery. They get back the conversions that iOS and browsers stripped away, and call it done. I take it one step further. Once your data is clean, I feed it back into Meta and Google in a structured way. The algorithm learns who your actual buyers are, not just who clicked, then it goes and finds more people like them. That is the difference between getting more leads and getting more of the right leads. Volume is easy. Quality is what changes a business.

Why high EMQ matters

Event Match Quality is the score Meta gives every event you send to its API. Most setups land between 5 and 7. I build toward 9 and above, with a peak of 9.3 out of 10 on well-structured accounts. The difference is real revenue. A high EMQ means Meta can match almost every event to a real user profile, so your bidding gets smarter, your lookalike audiences get sharper, and your cost per acquisition falls because the algorithm finally has clean information to learn from.

My stack

Tools I connect for you.

CRM systems I connect

Your CRM is the source of truth for what actually converted. I connect whatever you use.

GoHighLevelHubSpotPipedriveSalesforceZoho CRMMindBodyActiveCampaignKeapMonday SalesClose.comCopperInsightlyFreshsales GoHighLevelHubSpotPipedriveSalesforceZoho CRMMindBodyActiveCampaignKeapMonday SalesClose.comCopperInsightlyFreshsales
Automation tools for offline tracking

When direct CRM integration is not available, I use these to pipe events.

ZapierMaken8nPabblyNative APIsWebhooks ZapierMaken8nPabblyNative APIsWebhooks ZapierMaken8nPabblyNative APIsWebhooks ZapierMaken8nPabblyNative APIsWebhooks
Platforms & CMS

Every business runs on something. I have implemented tracking on all of these.

WordPressShopifyWooCommerceWixSquarespaceWebflowBigCommerceMagentoClickFunnelsKajabiDudaDrupalJoomlaGhostHubSpot CMS WordPressShopifyWooCommerceWixSquarespaceWebflowBigCommerceMagentoClickFunnelsKajabiDudaDrupalJoomlaGhostHubSpot CMS
Forms & booking tools I track natively

If your form or booking system can submit, I can track it.

TypeformJotFormGravity FormsWPFormsContact Form 7CalendlyAcuityHubSpot FormsNinja FormsFormstackWufooPaperformTallyConvertKitMailchimp Forms TypeformJotFormGravity FormsWPFormsContact Form 7CalendlyAcuityHubSpot FormsNinja FormsFormstackWufooPaperformTallyConvertKitMailchimp Forms

Every project is remote, fully documented, and built so you understand exactly what is firing and why. If you ever stop working with me, your tracking does not break, because nothing depends on me being there. That is what good measurement looks like.

Free audit call

Book your free tracking audit.

Pick a time that works for you. On the call I review your Pixel, Conversion API, GA4, and Enhanced Conversions, then walk you through exactly what is leaking and how I would fix it. No pitch, no obligation.

30 minutes, on your schedule Live walkthrough of your signal gaps Prefer to write first? Use the contact form
Get in touch

Let's talk about your tracking setup.

Tell me about your project, your tracking issue, or your business goals. I read every message personally and reply within 24 hours.

Direct contact
💬
WhatsApp
Response time
Within 24 hours, every day
🌏
Working hours
6 AM to 11 PM (GMT+6)
Prefer to talk?

Skip the form and book a free 30 minute call directly on my calendar. Best for project scoping or quick questions.

Connect with me

Follow my work or send a quick message on your favorite platform.

Need an urgent tracking fix? Send a WhatsApp message anytime, or email hello@souravanalytics.com directly.

Chat on WhatsApp