Üllar Maasik

About Me

March 17, 2025

Introduction

I am a 33-year-old guy who hails from Estonia and currently works in XYB as a Cloud DevOps engineer for the Infrastructure team. I’ve been working with a wide range of infrastructure for almost 10 years now and I absolutely love working with systems that bring joy to users, be it internal or external. When it comes to programming languages I’m very proficient in Bash, Python, and Go, but I won’t shy away from any new language! I’ve managed infrastructure with Chef, Ansible, and most often with Terraform. I tackle problems in a pragmatic way and truly enjoy it when a team comes together to solve a problem.

Contacts

Experience

XYB

Cloud DevOps engineer from March 2024–today

Lead migration from Jenkins’ CI/CD to GitHub Actions with great automation around workflow creation and workflow distribution.
Responsible for driving hermetic infrastructure creation.

Keywords: AWS, Argo CD, CI/CD, Kubernetes, Terraform

RangeForce

DevSecOps engineer from December 2019–June 2024

Created a robust infrastructure to support instantiation of virtual-machine-based learning content in Azure.
Ensured reproducibility by creating continuous deployment pipelines.
Developed internal tooling for developers to quickly and comfortably interact with the back-end required to create learning content for end users.
Lead push to manage the entirety of the infrastructure with Ansible and Terraform.

Reason for leaving: something in me wanted to put down roots in a new company

Keywords: Ansible, Azure, Bash, CI/CD, Docker, Flask, GitLab, Go, Python, Terraform

Skype/Microsoft

Service engineer from April 2016–December 2019

Created automation to ease maintenance across a heterogeneous infrastructure.
- Implemented a configuration management system for physical servers running Hyper-V using Chef and Desired State Configuration.
- Developed PowerShell tooling enabling end users of our infrastructure to have visibility as to when their virtual machines are scheduled for downtime as a part of regular maintenance and enable the ability for them to automatically notify us of any postponements per virtual machine.
Upheld best practices by adhering to and creating standards of procedures for various tasks in day-to-day activities as well as documenting anything that might have the danger of being known to only one person.
Administered VPN gateways, provided assistance to end-users with VPN-related issues, and spearheaded migration to Microsoft’s own VPN solution.

Reason for leaving: to work closer to the end user where my day-to-day work would have a more immediate impact

Keywords: Azure, Bash, Chef, CI/CD, DSC, Hyper-V, PowerShell

AS Eesti Telekom

Datacenter hardware management duty technician from April 2014–January 2015

Installed physical hardware including cabling (e.g. servers, routers, switches, firewalls, disk arrays, controllers etc.).
Did basic systems configuration and management through HP Integrated Lights-Out
- Scripting with Bash and PowerShell.
Monitored servers and services across multiple data centers with Opsview
- Wrote documentation to improve future work.

Reason for leaving: to spend the last semester of college studying abroad in the Technological Educational Institute of Crete

Keywords: Bash, PowerShell

Education

Certified LPIC-1 Linux Server Professional

LPI ID: LPI000352151
Verification code: vvz4wzjzvv

Topics learned cover all the basic skills that are common to major Linux distributions, such as software installation and package management, scripting, data management, administrative tasks, networking fundamentals and security. More information can be found here and by viewing the individual 101 and 102 exam objectives.

The Estonian Information Technology College

BSc, majored in IT systems administration from 2011–2015

Participated in the 2014 Erasmus intensive course “Deploying IT Infrastructure Solutions” with the team project “Visualization of Municipality’s Budget”

Thesis subject: Creating Intelligent Storage Systems Study Materials to Renew Course Learning Resources [by the Example of the Estonian Information Technology College]

Tallinn’s 32nd High School

GSE, emphasis on multimedia and mathematics from 2001-2011

Projects