Software engineer · Java Champion · Open-source contributor · DevNexus co-founder
I’m the founder of Hillert, Inc., based on Hawaiʻi Island. My work centers on Java and Spring, drawing on a background in enterprise integration and distributed systems.
Open source has been part of my professional work since 2011. I enjoy building full-stack applications, contributing to open-source projects and sharing knowledge with fellow developers.
I’m building Pembana: software for botanical gardens, arboreta and plant collectors, alongside reusable open-source libraries and tools.
Selected projects:
- Pembana Search — Advanced search expressions for Spring Data JPA, with optional Spring Boot and Spring MVC integration. Currently in development.
- Pembana Image Filters — Java image-processing filters based on Jerry Huxtable’s JHLabs filters.
- Pembana Rain Gauge — Tools for exploring rainfall observations from Hawaiʻi monitoring stations.
My professional open-source work has included:
- Spring Integration — Former core team member; creator of Spring Integration Extensions and the Spring Integration Zip extension.
- Spring Cloud Data Flow — Former core team member, with earlier work on Spring XD.
- Spring Batch — Contributions including work on the Spring Batch Integration module.
- Coherence Spring and Oracle Coherence — Work across Spring integration and distributed data systems.
- Coherence Hibernate — Former maintainer.
My repositories also include examples and experiments in application integration, image processing and high-precision GPS.
I’m a Java Champion, DevNexus co-founder and conference speaker. I share technical articles, examples and presentations on my website.
Berlin roots, Hawaiʻi Island home. I maintain the largest plant and palm collection on the Big Island’s west side and serve on the board of the Hawaiʻi Island Palm Society.
I enjoy triathlon and marathon running, with numerous marathons and the 2019 Kona IRONMAN among my finishes.