martech-specialist
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Christian Baumgertel · Berlin

MarTech
Specialist

Marketing data everyone can rely on.

I connect the tools you use to run and measure marketing: tag management, consent, ad platforms, shop, CRM and data warehouse. That way, data is captured cleanly, shared in a GDPR-compliant way and combined so that marketing, product and finance work from the same numbers. 13 years of experience in tracking and MarTech, including at Zalando and asgoodasnew, freelancing since 2023. Tool-agnostic, with strong Shopify expertise.

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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 tracking

  • Consent & 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 v2

  • Data warehouse & attribution

    Combine shop, CRM and advertising data in BigQuery and build attribution that compares channels and campaigns fairly.

    BigQuery · Airbyte · Dataform · API · GraphQL

  • Integrations & 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 tool

  • Reporting & 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 · Spreadsheets

  • Audits, 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

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.

How I work

Always the same sequence. Depending on your starting point, some steps are short.

  1. Assessment

    Review stack, tools and data quality. Talk to the teams who work with the data.

  2. Concept

    Define which questions the data should answer. Derive events, KPI definitions and concrete requirements for setup and integrations.

  3. 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.

  4. Validation

    Reconcile shop, analytics, ad platforms and data warehouse. Explain or fix discrepancies before anyone makes decisions based on them.

  5. 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 compared influencer spend with revenue by region.

zalando · asgoodasnew · air berlin · parship · koro · vegdog · lavera · mymuesli · omami · dime beauty · code university · 7days

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 intro call. After that, I usually suggest a compact audit so it is clear where you stand and what is worth tackling first.

Contact

You will find all contact options and my full profile on my main website.

direct: hello@baumgertel-consulting.com

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