David L.

Fetcherr is a deep-tech company that has developed a proprietary Generative AI pricing engine for the aviation and travel industries. Its Market Intelligence and Pricing System (MIPS) uses high-frequency data and Large Market Models (LMMs) to predict market trends and automate real-time pricing and inventory management.

• Engineered robust data sources within Google Cloud Platform (GCP) using complex SQL queries and Common Table Expressions (CTEs), with a strong focus on performance optimization to support large-scale Tableau dashboards.
• Significantly reduced extract generation and upload times by implementing the pantab library, converting Python DataFrames directly into Tableau Hyper extracts and improving data freshness.
• Managed Tableau Server administration and leveraged its internal PostgreSQL repository to build comprehensive analytics reports for monitoring user adoption and system performance.
• Built and maintained optimized ETL workflows using Dataform and Python, ensuring data integrity and seamless synchronization across cross-functional business units.
• Refined data modeling processes to handle high-frequency market data, enabling the delivery of real-time insights for the company’s AI-driven pricing engines.

Alior Bank is one of Poland's most innovative financial institutions, combining traditional banking with cutting-edge technology. The bank focuses on digital transformation and advanced data analytics to provide personalized financial products and services to a diverse portfolio of individual and corporate clients.

• Translated complex business requirements into actionable insights by designing and developing sophisticated Tableau dashboards, enabling data-driven decision-making across multiple departments.
• Engineered and maintained robust ETL pipelines using AutomateNOW and developed highly optimized SQL queries to ensure efficient data processing and system performance.
• Enforced strict data governance and compliance standards by implementing Row-Level Security (RLS) and managing complex technical migrations to modern data sources.
• Conducted end-to-end troubleshooting and delivered proactive ad hoc analyses to resolve critical data bottlenecks and address real-time business needs.
• Managed the transition of legacy reporting systems to new database environments, ensuring data integrity and zero downtime for end users throughout the migration process.

Accenture is a global professional services company and a leader in digital, cloud, and security. Combining unmatched experience and specialized skills across more than 40 industries, Accenture provides strategy and consulting, technology, and operations services—all powered by the world’s largest network of Advanced Technology and Intelligent Operations centers.

• Designed and developed high-impact Tableau dashboards, collaborating directly with cross-functional stakeholders to translate complex business requirements into precise, actionable reporting solutions.
• Executed seamless dashboard migrations to new data sources and cloud environments, implementing rigorous validation protocols to ensure reliability and zero reporting downtime.
• Proactively monitored and audited data pipelines to maintain data accuracy, resolving discrepancies before they impacted executive-level decision-making.
• Served as a primary technical consultant for business units, providing expert guidance on data visualization best practices and identifying key performance indicators (KPIs) to drive operational efficiency.
• Enhanced existing reporting solutions by optimizing SQL queries and workbook performance, resulting in faster load times and a more responsive user experience for global teams.

Betfan is a prominent online sports betting and gaming operator known for its technology-driven approach to the gambling industry. The company focuses on providing a personalized user experience through advanced data analytics and innovative marketing automation to maintain a competitive edge in the European betting market.

• Spearheaded the end-to-end integration of Optimove, designing and executing a targeted mobile marketing strategy that resulted in a 1,000x increase in weekly revenue through hyper-personalized user journeys.
• Managed advanced data reporting pipelines and served as the primary Tableau administrator, creating complex visualizations and dashboards that transformed raw data into actionable business intelligence.
• Leveraged predictive modeling and customer segmentation to automate marketing campaigns, significantly reducing churn and increasing the lifetime value of the active player base.
• Engineered robust data frameworks to support executive-level decision-making, ensuring that strategic initiatives were informed by real-time performance metrics and market analysis.