Sean Omeara
Principal Systems Engineer at ZeroTier, Inc.
Berlin, Germany
Summary
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RockstarSean Omeara is a Principal Systems Engineer based in Berlin with 15 years of experience designing and operating large-scale infrastructure for companies from startups to global platforms. He blends deep SRE and DevOps expertise with hands-on automation, CI/CD and packaging work—evidenced by contributions to widely used open-source cookbooks (mysql, docker) and cross-platform build pipelines for ZeroTier. Sean has led infrastructure operations and reliability teams (ZeroTier, Fastly) and consults as a principal engineer, translating operational pain points into robust automation and testable infrastructure-as-code. He is skilled at modernizing legacy tooling—migrating test suites to Inspec, converting LWRPs to custom resources, and streamlining multi-arch build workflows—so teams can ship safely and repeatably. Known for pragmatic leadership and a preference for fixing build-and-test bottlenecks, he often focuses on the developer experience as the fastest path to operational reliability.
16 years of coding experience
15 years of employment as a software developer
Github Skills (30)
cookbook10
docker10
testing10
linux10
chefspec10
bash10
dockers10
chef-client10
automation10
ci-cd-pipeline10
build-automation10
infrastructure-as-code10
chef-solo10
automations10
devops10
Programming languages (15)
Github contributions (5)
sous-chefs/docker
Jun 2016 - Apr 2018
Development repository for the docker cookbook
Role in this project:
DevOps Engineer
DevOps EngineerContributions:133 commits, 244 PRs, 677 pushes in 1 year 10 months
Contributions summary:Sean primarily contributed to the Docker cookbook, focusing on infrastructure-as-code and deployment-related improvements. They implemented features to support installation using tarballs, refined service configurations, and introduced testing capabilities within the context of the Docker environment. The user also addressed various operational and configuration aspects, ensuring compatibility and correct behavior. Finally, the user addressed integration tests.
dockerchefchef-resourcemanaged-by-terraform
sous-chefs/mysql
Jul 2016 - Jan 2017
Development repository for the mysql cookbook
Role in this project:DevOps Engineer
DevOps EngineerContributions:18 commits, 41 PRs, 105 pushes in 6 months
Contributions summary:Sean primarily contributed to updating and refactoring the build and testing infrastructure of the MySQL cookbook. Their work included converting Lightweight Resource Providers (LWRP) to custom resources, removing dependencies, improving ChefSpec configurations, renaming test suites, and migrating to Inspec for testing. Furthermore, the user updated the CHANGELOG and bumped the metadata of the cookbook, signifying their role in managing the release process.
mysqlchef-resourcechefmanaged-by-terraform
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