Teemu Matilainen
DevOps Engineer at ICEYE Oy
Helsinki, Finland
Summary
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RockstarTeemu Matilainen is a Helsinki-based DevOps engineer with 16 years of hands-on experience building and hardening developer tooling and provisioning workflows. He brings deep expertise in Vagrant and cloud provisioning—contributing to HashiCorp’s Vagrant and DigitalOcean-focused plugins—alongside pragmatic work to improve cross-platform compatibility, SSH reliability, and provisioning bootstraps. Known on GitHub as an "Intergalactic DevOps Whisperer," Teemu combines QA-driven test improvements with infrastructure work, ensuring plugins and bootstrapping tools are both usable and maintainable. He has a knack for quietly fixing tricky edge cases (hostname/NFS issues, communicator waits, rsync and Chef integration) that make developer environments reliably reproducible at scale.
16 years of coding experience
English, Spanish, Finnish
Stackoverflow
4,106reputation
294kreached
88answers
0questions
chef-infra
top-5%
vagrant
top-1%
Github Skills (32)
scripting10
testing10
plugin-development10
linux10
bash10
ruby10
chef-client10
automation10
script10
virtualbox10
virtualization10
sh10
chef-solo10
automations10
shell10
Programming languages (14)
Github contributions (5)
matschaffer/knife-solo
Nov 2012 - Sep 2014
DEPRECATED: Please consider using https://knife-zero.github.io/, ansible, or visit https://www.chef.io/ for other ideas
Role in this project:
DevOps Engineer
DevOps EngineerContributions:193 commits, 3 comments, 1 issue in 1 year 10 months
Contributions summary:Teemu primarily focused on improving the bootstrapping and build process of the `knife-solo` project. They refactored code related to the bootstrapping process, including Linux-specific methods and handling for various Linux distributions. Key contributions include ensuring necessary packages are installed for different operating systems and improving the rsync functionality to ensure proper file synchronization. The user also improved the project's dependency management and integration with tools like Berkshelf and Librarian.
ansible
dotless-de/vagrant-vbguest
Oct 2013 - Mar 2015
A Vagrant plugin to keep your VirtualBox Guest Additions up to date
Role in this project:DevOps Engineer
DevOps EngineerContributions:12 commits, 1 PR, 1 push in 1 year 5 months
Contributions summary:Teemu made several contributions to improve the functionality and stability of the `vagrant-vbguest` plugin. They addressed compatibility issues with different Vagrant versions, particularly concerning the `WaitForCommunicator` action and SSH connection handling. Furthermore, the user ensured proper loading of translation strings and bumped the version for development, indicating a focus on bug fixes, compatibility, and overall plugin maintainability.
vagrant-pluginvirtualbox-guest-additions
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