Erik Hollensbe
Trunk at Open Source
Oakland, California, United States
Summary
🤩
RockstarErik Hollensbe is a seasoned software engineer with 14+ years building reliable infrastructure, orchestration, and developer tooling from the kernel up to CI systems. Comfortable leading small teams, he’s known for pragmatic, production-first engineering—authoring high-performance, highly parallel CI at Pensando that shrank 40 hours of tests into ~20 minutes and contributed to a successful ASIC delivery. His open-source footprint spans container networking (netplugin/contiv), tooling for ZeroTier (zeronsd, terraform provider, coyote), and improvements to projects in Rust and Ruby, reflecting cross-language fluency and a preference for pragmatic automation. Erik favors robust, testable systems—refactoring build/test harnesses, moving builds to VM-based reproducibility, and hardening concurrency primitives for thread safety. Based in Oakland, he’s currently building Trunk, a privacy-first, user-friendly home OS for self-hosting services, blending infrastructure savvy with a people-first ethic. He’s the kind of engineer who’ll trade a quiet Friday night to keep production healthy and values mutual respect as his currency.
14 years of coding experience
22 years of employment as a software developer
Github Skills (29)
docker10
multithreading10
dns-resolver10
build-system10
makefile10
dockers10
cicd10
ruby10
chef-client10
automation10
rdoc10
dns10
chef-solo10
automations10
nameserver10
Programming languages (17)
Github contributions (5)
contiv/netplugin
Aug 2015 - Mar 2016
Container networking for various use cases
Role in this project:
DevOps Engineer & Automation Engineer
DevOps Engineer & Automation EngineerContributions:30 commits, 84 PRs, 56 pushes in 7 months
Contributions summary:Erik primarily contributed to improving the build and test infrastructure. Their work included refactoring the build system using a VM-based approach for consistency across platforms. Key changes involved updating the Vagrantfile, Makefile, and incorporating new builder images with Docker and systemd support. They also updated system test harnesses and utilities, replacing older dependencies with a new systemtests-utils repo. These changes focused on streamlining the build and test processes for the project.
casesuse-casescontainer-networkingnetwork-automationnetworking
berkshelf/berkshelf
May 2012 - Jul 2012
Role in this project:DevOps Engineer
DevOps EngineerContributions:68 commits in 2 months
Contributions summary:Erik contributed significantly to the Chef Cookbook manager, Berkshelf, by implementing and refining the build and deployment processes. Their work includes instantiating download commands, integrating Chef::Knife::CookbookSiteShow for improved functionality, and resolving conflicts arising from branch merges related to executable scripts. They also addressed testing and dependency issues within the project.
command-line-toolcookbooktest-kitchenrecipechef
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