Christian Baumgertel · Berlin
MarTech
Specialist
Marketing and UX data everyone can rely on.
I make sure your website and campaign data is captured cleanly, shared in a GDPR-compliant way and combined into one shared set of numbers, so marketing, product, pricing and finance can make better decisions. Working in tracking and MarTech since 2012, including at Zalando, airberlin and asgoodasnew, freelancing since 2023.
Experience includes

From data capture to decisions
Visitors leave traces on your website: where they come from, what they look at, where they drop off and what they buy. Captured and connected properly, these traces turn into answers for marketing, website, shop, pricing and category management.
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Capture
What happens on your website?Tag management and consent make sure visits, campaigns and purchases are captured consistently, and only with consent.
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Connect
What does it mean?Shop, CRM, partner platforms and data warehouse are linked. Single events turn into campaign, new customer, margin and customer value.
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Improve
What do we do now?Analyses and reports every team reads the same way. So you keep improving campaigns, website, shop and prices, based on the same numbers.
Tool-agnostic, with strong Shopify expertise, and focused on long-term, scalable and cost-efficient solutions.
Services
From the first event in the browser to the number in your report. Book them individually or as a whole.
Tracking & measurement
Measurement plan, data layer, tag management and server-side tracking. For shop systems as well as custom builds, headless shops, single-page apps and mobile apps.
GTM · sGTM · GA4 · Meta CAPI · Google Adsmore on trackingConsent & privacy
A consent banner that is actually connected to all your tags, Google Consent Mode v2, and a clear policy on which data is shared with whom.
CCM19 · Consent Mode v2Data warehouse & attribution
Combine shop, CRM and advertising data in BigQuery and build attribution that compares channels and campaigns fairly.
BigQuery · Airbyte · Dataform · API · GraphQLIntegrations & enrichment
Consistent campaign parameters, API connections and server-side enrichment, so ad platforms and marketing partners receive better signals.
Meta · Google Ads · Awin · Mailchimp · UTM toolReporting & BI
Funnel, campaign and LTV reports on a reporting layer every team reads the same way. Your BI tool gets a clean data foundation.
Data Studio · Power BI · SpreadsheetsAudits, processes & handover
Assessment of your stack and data quality, business and process analysis with the teams involved, plus documentation and training so your team can carry on independently.
Audit · Documentation · Data contracts · Git
Packages & prices
Clear starting points instead of open-ended hours. All prices net, plus VAT where applicable.
- Start here
Tracking audit
€1,200 fixed price for Shopify
from €1,500 for other shop systems, headless and apps
Checks whether your data is captured correctly.
- Scope
- Tag manager or custom pixel, Consent Mode v2, GA4, Google Ads and Meta conversions, shop ↔ GA4 reconciliation
- Duration
- about 1 week
- Outcome
- Prioritised list of actions and a 45-minute walkthrough. Credited towards a follow-up setup.
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Tracking & data audit
from €3,600 depending on scope
Checks whether your data works across the company: from capture to decision.
- Scope
- Stakeholder interviews, tracking, server-side GTM, data warehouse, attribution and KPI definitions. The price depends on platforms (web, app), data sources and teams involved.
- Duration
- 2 to 6 weeks
- Outcome
- Report with current state, risks and roadmap, presented to the teams involved.
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Shopify tracking setup
from €2,400
A standardised, proven setup for Shopify. Other systems based on effort.
- Scope
- Consent Mode v2, custom pixel, server-side GTM, GA4 e-commerce, Meta Conversions API, Google Ads enhanced conversions
- Duration
- 1 to 3 weeks
- Outcome
- Validated setup including documentation and handover to your team.
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Ongoing support
from €1,200 per month
One dedicated contact for your MarTech stack.
- Scope
- Maintenance and monitoring, new campaigns, tools and shop changes, questions from marketing and controlling
- Duration
- ongoing
- Outcome
- Data your team can rely on, even after changes.
For “from” prices, the effort depends on your setup. You get the exact price as a fixed quote after the 15-minute call.
Who benefits
Good marketing data is not an end in itself. It helps the teams who make decisions with it.
- MarketingWhich campaigns and channels actually drive revenue and where budget is wasted.
- Product management & UXWhere users drop out of the funnel and whether new features work.
- Pricing & category managementHow prices, discounts and assortment affect demand and margin.
- Finance & controllingMarketing costs in relation to margin and customer value.
- ManagementOne shared set of numbers instead of three different truths.
For agencies
Your client needs tracking or data expertise that is not part of your core team? I join your project as a specialist.
- Part of your teamCoordination through you and in your tools. Your client stays your client.
- Clear interface to developmentData layer specifications and data contracts, so your developers know exactly what to build.
- Easy to quoteThe packages above are also available at a fixed price for your proposal to the client.
- Documented handoverDocumentation and versioning, so your team can maintain the setup later.
How I work
Always the same sequence. Depending on your starting point, some steps are short.
Assessment
Review stack, tools and data quality. Talk to the teams who work with the data.
Concept
Define which questions the data should answer. Derive events, KPI definitions and concrete requirements for setup and integrations.
Implementation
Tag manager, consent, server-side tracking, integrations and pipelines. On my own or together with your agency. I aim for a sustainable, cost-efficient system that follows industry standards.
Validation
Reconcile shop, analytics, ad platforms and data warehouse. Explain or fix discrepancies before anyone makes decisions based on them.
Handover & support
Documentation, versioning and training. Ongoing support for new campaigns, tools and shop changes if you wish.
When clients bring me in
- “We no longer trust our numbers.”Beauty · Shopify · USA
Several freelancers had worked on the tracking without any handover. An audit and clean-up restored confidence in the data.
- “We’re switching shop systems.”Beauty & health · Shopware → Shopify
Tracking rebuilt during the migration, including server-side GTM. Data stayed comparable before and after the move.
- “We need a long-term partner.”Pet food D2C · since 2023
Consent, server-side tracking, a BigQuery data warehouse, funnel and LTV reporting, and training for marketing and controlling.
- “Which influencers are worth it?”Food start-up · Shopify
Introduced consistent campaign parameters, combined Meta, Ads, Mailchimp and shop data, and used correlation analysis to assess how influencer spend affects online and offline revenue, broken down by region.
- “We want to address customers by their value.”Pet food D2C · Shopify
Built data enrichment to form customer segments by LTV and address them specifically in marketing.
MarTech, demystified
What does MarTech mean, and where does tracking come in?
MarTech covers the tools used to plan, deliver and measure marketing: tag manager, consent tool, analytics, ad platforms, CRM, shop and data warehouse. Tracking is the foundation because it supplies the data. My focus is on making these tools work together cleanly and deliver reliable data.
Are you tied to specific tools?
No. I work tool-agnostic and recommend what fits your setup, your team and your budget. Where it makes sense, I prefer sustainable, self-hosted solutions without unnecessary recurring SaaS costs.
Do you work with international teams?
Yes. I work in English and German, with teams in Germany and internationally, for example for a beauty shop in the US.
Do you work with our agency?
Yes, regularly. I take care of concept and implementation in the MarTech stack and coordinate with your agency or developers wherever changes to the shop are needed.
How do we get started?
With a free 15-minute call or a short message via the form. After that, I usually suggest a tracking audit so it is clear where you stand and what is worth tackling first.
What does working together cost?
There are fixed starting points, all net: the tracking audit for Shopify at a fixed price of €1,200, from €1,500 for other systems, the tracking & data audit from €3,600 depending on scope, the Shopify tracking setup from €2,400 and ongoing support from €1,200 per month. You get the exact price as a fixed quote after the intro call.
Do you measure this website?
Yes, but without cookies, without a banner and without third parties. I show openly how it works and what I can see on the page How I measure this website.
Contact
Tell me briefly what it is about. One sentence is enough. I usually reply within one working day.
Prefer to talk? 15 minutes are enough to see whether and how I can help.