About the author
Alex is a principal consultant on the services EMEA team. He holds a master's degree in computer engineering from the University of Toronto, a B.Sc. from the University of Manitoba, and an MBA from the IESE Business School in Barcelona. Check out his personal blog at www.AlexMarquardt.com.
Author's articles
December 10, 2025
How to improve e-commerce search relevance with personalized cohort-aware ranking
Improve e-commerce search relevance with explainable, cohort-aware ranking in Elasticsearch. Learn how multiplicative boosting delivers stable, predictable personalization at query time.
December 8, 2025
How excessive replica counts can degrade performance, and what to do about it
Learn about the impact of high replica counts in Elasticsearch, and how to ensure cluster stability by right-sizing your replicas.
October 21, 2024
Efficient bitwise matching in Elasticsearch
Explore six approaches to encoding and matching binary data in Elasticsearch, including terms encoding (my preferred approach), boolean encoding, sparse bit position encoding, integer encoding with exact matching, integer encoding with scripted bitwise matching, and integer encoding with ESQL for bitwise matching, with practical examples and use cases.