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Erhan KulEK

Erhan Kul

Principal Product Analyst

€500/day
Berlin, DE
8-15 years

Average response time: 1 hour

About Erhan

Who I Am & How I Can Help

  • 10+ Years of Expertise: Senior-level experience in leveraging advanced statistical modeling, A/B testing, and data-driven strategy to solve complex business problems.
  • Bridge Between Tech & Business: I specialize in translating sophisticated data science (SQL, Python, Spark) into clear, multi-million-euro commercial outcomes.
  • Pricing Specialist: Deep domain knowledge in e-commerce pricing frameworks, promotional optimization, and price elasticity.
  • Scientific Rigor: Expert in causal inference and large-scale experimentation to ensure budget is spent only where it drives incremental value.

Technical Arsenal & Skills

  • Coding: SQL (Expert), Python (Pandas, NumPy, Scikit-learn), Spark, PySpark.
  • Environments: Databricks, BigQuery, AWS, Grand National Assembly of Turkey (IT systems).
  • Data Visualization: Tableau, Looker, BigQuery ML, custom Python visualizations.
  • Methodologies: Causal Inference, A/B Testing (Article & Customer-based), Price Elasticity Modeling, Regression Analysis, Forecasting, Stock Optimization.

Added Value

  • Senior Stakeholder Management: Experience presenting complex analytical findings to C-suite and VP-level management at European tech giants.
  • Scalability: I don't just provide one-off analyses; I build automated, scalable tools that continue to deliver value long after the initial project ends.
  • Commercial Mindset: Every line of code I write is focused on the bottom line—profitability, revenue growth, and cost reduction
  • English

    Native or bilingual

  • Turkish

    Native or bilingual

  • German

    Basic

Can work on-site
Berlin (up to 50km)

Experience

  • Pricing Zalando SE
    Principal Product Analyst
    E-COMMERCE
    April 2022 - Today (4 years and 2 months)
    Berlin, Germany
    • ● Developed a pricing model for over 5 million articles using price elasticity, increasing profit by 14% (€90M) and revenue by 5% (€150M).
    • ● Delivered €10M in incremental profit by developing an algorithmic stock management system for cross-channel transfers (Shop, Lounge, About You), automating processes and reducing labour costs.
    • ● Developed and implemented customer-based A/B testing platform and causal models to optimize coupon budget allocation and foster a culture of experimentation.
    • ● Designed and executed article-based A/B tests to support algorithmic pricing adoption, providing data-driven insights for competitive pricing and informed merchandiser decisions.
    SQL, Python Data analysis Data science Pricing strategy
  • Nova Akademi
    Lead Data Analyst
    EDUCATION AND E-LEARNING
    November 2017 - November 2021 (4 years)
    Ankara, Türkiye
    • ● Managed and delivered analytical projects, providing practical recommendations to guide business strategy, and mentored junior analysts on technical skills.
    • ● Conducted in-depth analysis of pricing and sales bonus data, using Python predictive models to identify bonus structures linked to performance stress levels.
    • ● Developed and implemented advertising strategies based on statistical analysis, resulting in a 20% increase in potential client reach.
    Python Marketing Studies Pricing strategy
  • Ministry of Foreign Affairs of Turkey
    Consultant
    December 2013 - November 2017 (3 years and 11 months)
    Türkiye
    • ● Developed and oversaw weekly polling and reporting cycles, orchestrating data collection initiatives for major election campaigns.
    • ● Performed analyses on survey datasets, generating election outcome predictions with 90% accuracy.
    • ● Conducted A/B tests using surveys to evaluate political arguments, identifying optimal communication strategies.
    • ● Analysed and mapped election district investments, identifying urgent investment areas and contributing to a 15% increase in targeted funding.

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Education

  • Bachelor of Science
    Karadeniz Technical University
    2008
    Bachelor of Science
  • Erasmus+ Program, Mathematics and Statistics
    Eszterhazy Karoly Foiskola
    2007
    Erasmus+ Program, Mathematics and Statistics

Skill set

Categories