Over the years I've used a lot of open source tools across different roles and clients. When I find a bug or something missing, I fix it and send it upstream. These are some of those contributions.
Infrastructure & Security
Netflix/bless
Built configurable username validation with multiple strategies, Docker-based Lambda build tooling, and documentation improvements.
Spinnaker
Delivered Slack integration across service layer, CLI tooling, and documentation. Contributions spanning echo, halyard, and spinnaker.io.
Cloud Custodian
Implemented GCP image lifecycle management with full test coverage.
Language Runtimes
Rubinius
Implemented ARGF in-place editing from scratch.
Developer Tools
load-env-vars
Emacs package for loading environment variables from files.
expand-region.el
Fixed Ruby block marking. The package is distributed through GNU ELPA with FSF copyright assignment.
Other Contributions
I've also sent patches to Rails, ActiveAdmin, Kaminari, Centrifugo, Terraform Google Modules, and various Emacs packages like el-get, magithub, and rvm.el.