David Heffelfinger
Principal Consultant at Ensode Technology, LLC
Virginia, United States
Summary
👤
Senior🎓
Top SchoolDavid Heffelfinger is a seasoned Principal Consultant specializing in Java, Jakarta EE, and MicroProfile, with more than two decades in software architecture and enterprise development. An accomplished author of multiple Java books and a TechBeacon-recognized Java leader to follow on Twitter, he blends deep API expertise (JSF, EJB, JPA, JMS, CDI, JAX-WS, JAX-RS, WebSocket) with hands-on delivery. He leads complex, multi-stakeholder projects for government and financial clients, including DHS, HUD, CBP, Freddie Mac, and Fannie Mae, from green-field Java EE/Jakarta EE applications to cloud-based microservices on Docker/OpenShift. He also helps teams transition legacy J2EE to modern architectures using Spring Boot and containerization, while evangelizing JSF/PrimeFaces in the enterprise. Based in Virginia, he is a Java Champion and Apache NetBeans Committer who contributes as an instructor and technical author, and speaks frequently at conferences such as JavaOne.
9 years of coding experience
13 years of employment as a software developer
MS, Software Engineering, MS, Software Engineering at Southern Methodist University
English, Spanish
Github Skills (34)
jakarta-ee10
payara10
microprofile10
java10
tomee9
java-ee-89
php9
java-ee9
network-server9
apache8
dm7
javaee87
java-87
blueprints6
glassfish6
Programming languages (3)
Github contributions (5)
PacktPublishing/Jakarta-EE-Application-Development
Jun 2023 - Feb 2024
, published by Packt
Contributions:2 PRs, 151 pushes, 1 comment in 8 months
dheffelfinger/Java-EE-8-Application-Development-Code-Samples
Jul 2017 - Dec 2018
Contributions:106 commits, 3 PRs, 88 pushes in 1 year 4 months
java-eejavajava-ee-applicationapplication-development
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