Anastasia Klein

Combine end-to-end BI ownership with hands-on analytics engineering across BigQuery, dbt, Looker/LookML, GA4, and workflow automation. Built and scaled a revenue-opportunity data product from the US to five markets; developed LLM-based entity resolution for 13.5K advertisers across ten affiliate networks. Develop click-to-commission analytics and governed growth metrics. Reduced daily BigQuery costs by 46% and the cost of a high-usage Looker Explore by a further 30%.

Partnered with Finance to build trusted reporting for payments, receivables, and forecasting. Designed data models and reconciliation logic across 30M+ transactions, 56 publishers, and 13.5K advertisers. Built LookML models, Explores, and dashboards; integrated and validated data from APIs, FTP feeds, and documents. Supported migration from SQL Server to GCP, identifying missing and duplicated records and timezone inconsistencies before production.

* Performed the EDA of the data obtained from integrated energy systems for heating, cooling and supplying hot water based on renewable thermal energy * Verified the calculations of the system efficiency with the values of an external device, detected anomalies, revealed an inaccuracy in gathering data from the sensors * Identified the dependencies between the controlled parameters on compressors and the system performance Technologies: Python, SQL (MySQL)

* Designed and developed a decision support system based on the data of SEC13F filings that generated low-frequency trading signals which performed better than the S&P500 index. * Created metrics/ratings of traders’ competence and rankings of stock performance, developed portfolio strategies based on the metrics using ML algorithms and conducted backtesting for picking the best and the worst traders and stocks. Technologies: Java, SQL (DB2, PostgreSql), Excel, STATISTICA (StatSoft), MatLab

A 9-month intensive program designed to train 100 talents to be successful Data Analysts in Germany