Corinna Z.

E-commerce teams want to ask AI about their data and trust the answer. I build that on Databricks with Claude, on numbers that match Shopify and finance. 15 years in data, ex-Deloitte. AI is only as good as the numbers underneath, so I start there. One brand's analytics showed up to 60% fewer paid conversions than Google Ads; the cause was clear in 4 days. What clients tell me when they reach out: - "We have all this data but still don't know what's going on." - "It takes days to answer a simple question." - "Whose report is right?" - "We have dashboards, but no answers." Where I help: - AI analytics: get your data ready for Claude, ChatGPT or Databricks Genie, so the answers are right and traceable. - Tracking and attribution: find where conversions go missing (GA4, GTM, consent, server-side, pixels) and reconcile platform numbers with your Shopify orders. - One trusted set of numbers: Shopify, Klaviyo, Recharge, Amazon and ad data in one warehouse (BigQuery, Databricks, Snowflake), with reporting your CFO signs off on. - Retention and LTV: cohorts, churn and repeat purchase, so you know which customers are worth acquiring. - Fractional data leadership: strategy and hands-on delivery from one person, with my team of engineers when the build needs it. Results: - Healthcare e-commerce brand: data pipeline built from scratch, then upgraded as they grew. Their CMO: "The new insights we have are quite eye-opening for all of us." - DTC apparel brand: Shopify refunds and returns finally matched the finance view. Their CFO called me "100% the best choice on probably the entire internet for Domo work." - U.S. travel brand: monthly sales reporting went from 6-8 hours of spreadsheet work to a one-click dashboard. - Healthcare data company, fractional CDO for 2.5 years: "Corinna is the best Chief Data Officer I have ever had for this company. I actually transferred her services over to another one of my companies." Fixed-price ways to start: - AI Answer Check: $5,000 fixed, within 2 weeks. 15 to 20 of your leadership's real questions, each answer graded against verified numbers. No fee if every answer checks out. If you start the build within 30 days, the full fee is credited. - Tracking & attribution audit: from $2,500, about 2 weeks - Business Intelligence Roadmap: $5,000, 4 weeks How I work: fixed scope and price, plain English, documentation your team can run with. I'm tool-agnostic and take no software commissions, so I'll pick the affordable tool when it's the right one. Many clients stay for years; my longest retainer has run 6 years. Background: ex-Deloitte (Data Analytics, Germany and the UK), 30+ BI projects, MSc in Brain and Cognitive Sciences (I started out as a sleep scientist). Databricks credentials in Genie, Agent Bricks and Lakehouse architecture. Upwork Expert-Vetted (top 1%) and Top Rated Plus. Send me the one question your team can't answer today.