Peter Stieg

Peter Stieg

Performance Marketing · Data Science

Marketing leadership with root access

sudo dream plan ship

Profile

mar·ke·tin·ker·er noun [marketer × tinkerer]

A marketing leader who builds the tools behind the campaigns.

Leadership roles at four companies, with interdisciplinary teams of up to six people in e-commerce and B2B. Certified Data Scientist and MLOps Engineer since 2025 – Liora, in partnership with Université Paris 1 Panthéon-Sorbonne.

€6k €240k
monthly media budget at a RoAS of 4.0 · Posterlounge
17 shops
in 12 languages across the European Economic Area · Posterlounge
RoAS 7.6 7.8
on a €1.7m media budget, while spend grew · Brandible
> 2×
inbound inquiries year over year · E+SERVICE+CHECK

P4

P as in Peter.

Performance

Google Ads, Microsoft Advertising, Meta, LinkedIn, SEO and marketplaces. Steered by cost per inquiry, quote and order.

Pipelines

Tracking with Google Tag Manager and Consent Mode v2, then Python, SQL, BigQuery and Data Studio on Google Cloud. Internal web apps in Streamlit.

Pixels

Corporate identity from claim to logo, websites, templates and employer branding. Figma, Inkscape, Canva – and Python wherever pixels can be generated.

People

Teams of up to six, from SEA to graphic design, trained in performance marketing and data analysis. Processes fit people, not the other way round. Everything human:e.

Experience

  1. since 11/2025

    Head of Marketing

    E+SERVICE+CHECK GmbH · Laucha

    TÜV-certified electrical safety inspections (DGUV V3/V4), nationwide, 349 employees.

    • Scope marketing, design and automation, built from scratch – SEA, SEO, CRM, events, employer branding
    • Result inbound inquiries more than doubled year over year; new corporate identity incl. groundwork for an EUIPO trademark

  2. 05/2025 – 07/2025

    MLOps Engineer (full-time)

    Liora · Université Paris 1 Panthéon-Sorbonne · Remote

    • Capstone the Rakuten model as a production pipeline – training, tracking, serving, monitoring

  3. 03/2025 – 07/2025

    Marketing & UX Design (part-time)

    Rapidobject GmbH

    • Scope UI concepts, usability tests, support for the migration from ActiveCampaign to Salesforce

  4. 02/2025 – 05/2025

    Data Scientist (full-time)

    Liora · Université Paris 1 Panthéon-Sorbonne · Remote

    • Capstone multimodal classification of e-commerce products with NLP and computer vision

  5. 11/2023 – 12/2024

    Head of Marketing

    Brandible by KSi International GmbH · Dresden

    B2B promotional products for Germany, Austria and Switzerland.

    • Team five – marketing, graphic design, project management
    • Budget €1.7m across Google Ads, Microsoft Advertising, Meta and LinkedIn
    • Result RoAS 7.6 7.8 while spend grew; Microsoft Advertising +45% revenue at a RoAS of 9.9

  6. 07/2023 – 10/2023

    Chief Operating Officer

    SportSpar GmbH · Leipzig

    • Scope e-commerce operations for discounted sporting goods, email automation, WhatsApp and Telegram

  7. 10/2017 – 06/2023

    Head of Marketing

    Posterlounge GmbH · Leipzig

    Art prints online in more than 15 European countries.

    • Path SEA Manager in 2017 Head of Marketing in 2021, three promotions
    • Team six – SEA, SEO, social, influencer, offline marketing, design
    • Result 17 shops in 12 languages; media budget €6k €240k a month at a RoAS of 4.0

  8. 10/2014 – 04/2017

    Online Marketing Manager

    YOUniversal Media Srl · Rome

    • Scope client and in-house accounts for DE, FR, IT, SE, UK and US – search, social, native, retargeting

  9. 2010 – 2014

    Marketing, market research, export

    Several companies · Rome

    • Scope export promotion, brand protection, competitive intelligence, web marketing

Projects

Stop starting. Start finishing.

At E+SERVICE+CHECK

  • Call and inquiry pipeline

    More than half a million calls, two phone systems, five web forms – joined with Odoo master data and Google Ads attribution.

    Python · BigQuery · Data Studio

  • PRUEF+CHECK

    Rule-based validation of inspection checklists instead of manual Excel checks. From requirement to go-live: five days.

    Streamlit · Azure

  • Document extraction

    Around 14,000 unstructured supplier documents turned into structured records for ERP import.

    Python · Claude API

  • Customer portal

    Moved to a company-owned Azure tenant with separate production and staging. Running cloud costs: a fraction of before.

    Azure

Certification capstones

  • Rakuten product classification

    Around 85,000 e-commerce products classified from text and images.

    Python · Keras · PyTorch · Google Cloud · GitHub

  • Rakuten classification · MLOps

    The same model as a production pipeline: training, tracking, serving and monitoring.

    Docker · Airflow · MLflow · FastAPI · Grafana · GitHub

Approach

  • Facts, not fluff. Every figure on this page can be backed up on request. Growth only counts when efficiency keeps pace.

  • Built, not briefed. Knowing the systems underneath makes agencies easier to steer. And less necessary.

  • Prompted, not pasted. AI is part of the toolbox – for code, copy and graphics. Nothing goes out unchecked.

Education

2025
Data Scientist1 · MLOps Engineer2
Liora in partnership with Université Paris 1 Panthéon-Sorbonne
2023
Agile project management specialist (IHK)
2010
Bachelor’s degree in economics
Università degli Studi di Trento
Languages
German (native) · English C2 · Italian C2 · Spanish B1 · French A2

Contact

Hallo · Hi · Ciao

Offline
Leipzig. Before: Rome, Trento, Jinotega (Nicaragua), Orem (Utah).

Sources

  1. ^ Data Scientist · issued 10 June 2025 · Verify credential · Course page
  2. ^ MLOps Engineer · issued 1 September 2025 · Verify credential · Course page