João Duarte
Tech Lead at Elastic
Portugal
Summary
🤩
Rockstar🎓
Top SchoolJoão Duarte is a Tech Lead with 17 years of software engineering experience, currently guiding the Logstash team at Elastic from Portugal. He combines hands-on back-end and DevOps expertise with team leadership, driving improvements in data ingestion, transport, and secure Elasticsearch integrations. His open-source contributions to high-profile projects like JRuby, Logstash plugins, and elastic/elasticsearch-ruby show a focus on reliability, security (dependency and SSL/auth enhancements), and cross-platform compatibility. João is comfortable refactoring complex codebases, fixing encoding and connection issues, and shipping systematic upgrades that reduce operational risk. He has a long-standing academic foundation in software engineering from Instituto Superior Técnico and a history of mentoring and process stewardship dating back to early roles as a CEP engineer and Scrum Master. Less obvious: he often works at the intersection of protocol-level plumbing and developer ergonomics, improving both low-level client transports and the testing/spec coverage that keeps systems robust.
17 years of coding experience
12 years of employment as a software developer
Alves MartinsBsc, Software Engineering, Bsc, Software Engineering at Instituto Superior Técnico
Portuguese, English
Stackoverflow
46reputation
1kreached
2answers
0questions
Github Skills (39)
http-authentication10
dependency-management10
ssl10
tls1210
jvm10
clientside10
rubygems10
testing10
amazon-elasticsearch10
tls1310
jdbc10
java10
ruby10
javas10
http-client10
Programming languages (11)
Github contributions (5)
logstash-plugins/logstash-input-jdbc
Sep 2015 - Mar 2021
Logstash Plugin for JDBC Inputs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:13 commits, 7 PRs, 8 pushes in 5 years 6 months
Contributions summary:João primarily focused on improving the Logstash JDBC input plugin. Their contributions included refactoring code by renaming methods (e.g., `teardown` to `close`), addressing encoding issues within the data processing, and modifying how column conversions were performed. They also worked on test specifications. These changes improved functionality, addressed reported issues, and improved the plugin's reliability and usability.
jdbclogstash
logstash-plugins/logstash-output-elasticsearch
Oct 2014 - Jun 2021
Role in this project:Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:73 reviews, 113 commits, 202 PRs in 6 years 8 months
Contributions summary:João significantly enhanced the Elasticsearch output plugin by adding support for HTTP authentication, SSL configurations, and client certificates. They refactored the code to improve modularity, moving SSL and authentication setup into separate methods. Additionally, the user introduced the option to enable cluster sniffing for the transport protocol and added the ability to customize paths for bulk requests, health checks, and sniffing. These changes improve security, flexibility, and management of the plugin.
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