About the author
Jeffrey Rengifo is a software developer focusing on improving search experiences using Elasticsearch. He specializes in GenAI and aims to innovate by creating new tools to help optimize different processes and solve everyday problems.
Author’s articles
August 18, 2025
Using FastAPI’s WebSockets and Elasticsearch to build a real-time app
Learn how to build a real-time application using FastAPI WebSockets and Elasticsearch.
July 24, 2025
LlamaIndex and Elasticsearch Rerankers: Unbeatable simplicity
Learn how to transition from Llamaindex RankGPT reranker to Elastic built-in semantic reranker.
July 22, 2025
Building Elasticsearch APIs with FastAPI
Learn how to build an Elasticsearch API with FastAPI using Pydantic schemas and FastAPI background tasks, demonstrated with a practical example.
July 16, 2025
AI-powered dashboards: From a vision to Kibana
Generate a dashboard using an LLM to process an image and turn it into a Kibana Dashboard.
July 11, 2025
Longer context ≠ better: Why RAG still matters
Learn why the RAG strategy is still relevant and gives the most efficient and better results.
June 17, 2025
Improving Copilot capabilities using Elasticsearch
Discover how to use Elasticsearch with Microsoft 365 Copilot Chat and Copilot in Microsoft Teams.
June 9, 2025
ES|QL in JavaScript: Leveraging Apache Arrow helpers
Learn how to use ES|QL with JavaScript Apache Arrow client helpers.
May 19, 2025
Elasticsearch in JavaScript the proper way, part II
Reviewing production best practices and explaining how to run the Elasticsearch Node.js client in Serverless environments.
May 15, 2025
Elasticsearch in JavaScript the proper way, part I
Explaining how to create a production-ready Elasticsearch backend in JavaScript.