Stefan Lafchiev

Background

About Stefan Lafchiev

Team Leader & Data Analyst with 5+ years of experience in data processing, validation, and analytics at NielsenIQ — the global leader in measurement and data insights. Skilled in Oracle SQL, Excel, and process optimization, with a proven track record of improving efficiency, accuracy, and client satisfaction. Currently leading the Input Validation Team, managing people, processes, and systems to ensure timely, accurate delivery of FMCG market data. Experienced in working with diverse stakeholders — clients, data providers, analysts, and data scientists — to deliver high-quality data products and services. Key achievements include: • Increased validation efficiency by 15% through SQL automation • Reduced error rate by 10% • Improved client satisfaction by 20% Passionate about collaboration, learning, and continuous improvement, I focus on developing high-performing teams through training, coaching, and a feedback-driven culture. Certified in Productivity, Prioritizing at Work, and Digital Body Language via LinkedIn Learning.