Jeff Mesnil
Software Engineer at IBM
Greater Grenoble Metropolitan Area France
Summary
🤩
Rockstar🎓
Top SchoolJeff Mesnil is a seasoned software engineer with 19 years' experience building robust, open-source server-side systems, currently at IBM after a long tenure as a senior principal engineer at Red Hat. He specializes in Java application servers and messaging (WildFly, JBoss EAP, ActiveMQ Artemis, HornetQ), with a track record of pragmatic contributions that improve JVM/runtime configuration, JMS bridging, and legacy client support. A committed open-source advocate, all his professional and personal code is public—much of it hosted on GitHub—and he thrives in collaborative, transparent development environments. He combines deep backend expertise with occasional mobile and iOS work (notably an MQTT Objective-C client) and has authored technical material for O’Reilly. Based in Grenoble, France, he brings engineering rigor informed by sustainability and humane values, and pursues photography as an amateur creative outlet.
19 years of coding experience
22 years of employment as a software developer
Ingénieur, Ingénieur at Institut national des Sciences appliquées de RouenMaster's Degree, Master's Degree at INSA Rouen NormandieMSc, MSc at Cranfield University
Stackoverflow
696reputation
53kreached
4answers
0questions
Github Skills (43)
objective-c10
ios10
brokers10
jms10
messaging10
testing10
javaee10
mqtt10
broker10
websocket10
jdbc10
java10
mqttnet10
servlet10
activemq-artemis10
Programming languages (18)
Github contributions (5)
mobile-web-messaging/MQTTKit
Oct 2013 - Sep 2015
MQTT Objective-C client for iOS
Role in this project:
Mobile Developer (iOS)
Mobile Developer (iOS)Contributions:43 commits, 1 push in 1 year 10 months
Contributions summary:Jeff primarily contributed to the `MQTTKit` library, which is an Objective-C MQTT client for iOS. Their work involved initial setup and testing of the library, adding dependencies like `libmosquitto`, and updating the API to use blocks instead of a delegate for callback methods. The user also updated the tests to use an external MQTT broker for testing purposes, and refined the `MQTTMessage` interface.
iosmqttobjective-c
hornetq/hornetq
Oct 2007 - Nov 2014
HornetQ is an open source project to build a multi-protocol, embeddable, very high performance, clustered, asynchronous messaging system.
Role in this project:Back-end Developer
Back-end DeveloperContributions:1366 commits in 7 years 2 months
Contributions summary:Jeff focused on adding new examples of JMS message handling with STOMP to the HornetQ core. They incorporated support for STOMP over WebSockets, ensuring proper frame handling, and added functionality for sending and receiving messages via STOMP. Furthermore, they implemented message body processing with headers and improved the management of connection handling and transaction handling.
asynchronoushornetq
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