Sina Behzadi

• Unified sales and returns reporting across four channels; reduced weekly preparation from five hours to 35 minutes.
• Identified a size-selection issue behind elevated returns and helped the product team reduce the affected category return rate from 19% to 14%.
• Defined and documented 26 business metrics, resolving inconsistent revenue and retention calculations across teams.
• Presented monthly findings with assumptions and limitations, helping nontechnical stakeholders distinguish seasonal movement from sustained changes.

• Prepared repeatable SQL extracts and quality checks for weekly client reporting.
• Built a customer cohort dashboard and explained retention trends in monthly stakeholder reviews.

Documents customer identity rules, returns treatment and cohort windows so product, finance and marketing teams can reproduce the same metric.