George Buitenhuis

Linux Devops Professional at Adfinis

Arnhem, Gelderland, Netherlands

+31262060086

georgebuitenhuis

credly

hyperfocus1337

hyperfocus

Experienced IT consultant with 4 years of professional experience and many more years of passionate hobby experience (see links above). Specialising in DevOps, Cloud, Infrastructure as Code (IaC), HashiCorp, Kubernetes and Python. Ever since I was young, I have had a passion for experimenting with the latest software. I thoroughly enjoy both development and operations. Before becoming a consultant I was an amateur startup founder, trying my luck at a few startup ideas in Sri Lanka and Thailand. Next to my technical ability I have valuable project management skills, gained from leading complex projects from inception to completion.

Skills

Specializations

Master

DevOps
Cloud
IaC
CI/CD
Linux
Consultancy

DevOps

Master

AWS
Azure
Github
Gitlab
Ansible
Terraform
Kubernetes

HashiCorp

Master

Terraform (Enterprise)
Vault
Consul
Boundary
Packer

Artificial Intelligence

Advanced

ChatGPT
Prompt Engineering
Coding Assistants
MLOps

Programming

Advanced

Python
JavaScript
NodeJS
Bash
PostgreSQL
SQL

Editors

Advanced

Emacs
Vim
VSCode

Work Experience (7)

Jul 2021 - Current

Linux DevOps Professional

Adfinis

https://adfinis.com

Ansible
Python
Bash
AWS
Azure
Docker
Terraform
Vault
Kubernetes
OpenShift
ArgoCD
Boundary
Packer
Nomad
Consul
Nginx
HAProxy
Traefik (EE)
Gitlab
GitHub (Actions)
Jenkins
Okta
OpenID Connect
OAuth 2
Icinga2
SNMP
DNS
Red Hat (Satellite)
PostgreSQL
MySQL

Consultancy work around DevOps/Cloud/HashiCorp and other open source software implementations. I work for various customers using different technologies in separate projects. Both short term as well as long term engagements for mostly Dutch, Swiss and German companies.

Gained all technical certifications from partners HashiCorp and Gitlab
Leading HashiCorp Vault consultancy projects (including a HashiCorp Vault FastTrack)
Leading Gitlab consultancy engagements as a Gitlab Professional Services Engineer (PSE)
Automated complete Azure environments from top to bottom using Terraform (CAF framework)
Building modern Kubernetes clusters using GitOps and IaC automation from scratch
Building many Ansible roles and Terraform modules solving common client problems
Gave a presentation about Emacs Org Mode during the Adfinis techie sync days in Basel (Switzerland)
Building complete monitoring solutions using Icinga2

Dec 2023 - Mar 2024

Gitlab DevSecOps Engineer

NatWest Group

https://natwestgroup.com

Bash
Gitlab
Docker
Kubernetes
Red Hat (Linux)

Assignment for Adfinis. Member of the Enterprise Engineering team. Responsible for furthering the adoption of Gitlab (features) in the environment, while aligning the interests of all internal stakeholders.

Migrating Continuous Integration (CI) and Continuous Deployment (CD) workflows from legacy platforms to Gitlab (Enterprise)
Creating Docker base images for multiple programming languages (with primary focus on Python)
Implementing DevSecOps features of the Gitlab platform (Code Quality, Code Coverage, Security Scanning, Packaging, etc)

Jul 2023 - Oct 2023

Kubernetes Engineer

IFF

https://iff.com

AWS
EKS
Cloudformation
Bash
Docker
Kubernetes
Helm
Traefik Enterprise Edition (EE)
ArgoCD
Okta
JupyterLab

Assignment for Adfinis. Engaged as a consultant to design and implement a container-based solution on AWS for machine learning model deployment. Selected Amazon EKS after a comprehensive evaluation of potential platforms. Executed the project using agile project management, emphasizing rapid, iterative sprints focused on tangible outcomes.

Initiated and developed a state-of-the-art EKS cluster from the ground up using CloudFormation, Traefik and ArgoCD for GitOps-driven continuous delivery
Compiled comprehensive SRE procedures, including executable Jupyter notebook documentation covering maintenance, troubleshooting, disaster recovery, and other operational procedures
Reduced code redundancy and enhanced maintainability by employing Kustomize for effective configuration management
Conducted comprehensive demonstrations of the platform and provided thorough knowledge transfer
Implemented Okta SSO, SSL termination and automated certificate renewal with Traefik

Dec 2022 - Apr 2023

Vault Architect

European Commission

https://commission.europa.eu

Ansible
Python
Bash
Terraform
Vault
Gitlab
Red Hat (Linux)

Assignment for Adfinis. Member of the Vault Architects team, responsible for providing support and development of the internal Vault(-as-a-service).

Designing, implementing, and maintaining all Hashicorp Vault environments
Fully automated deployment and configuration (using Ansible & Terraform)
Ensure proper integration of Hashicorp Vault with existing infrastructure and applications
Collaborate with stakeholders and teams across the organization to determine requirements

Sep 2021 - Jan 2023

DevOps Platform Engineer

VolkerWessels

https://volkerwessels.com

Ansible
Python
Bash
Azure (DevOps)
PowerShell
Terraform
Packer
Docker
Nginx
Traefik
Ubuntu
Github (Actions & Runners)
Make
DNS
MySQL

Assignment for Adfinis. Member of the Cloud Competence Team. Responsible for building the internal developer platform for all the VolkerWessels divisions (from scratch). My work consisted of coding automated Azure landing zones using the Cloud Adoption Framework (CAF), Terraform and GitHub Actions.

Automated deployment of multiple Azure tenants from top to bottom (Infrastructure as Code)
Developed a comprehensive internal developer platform, reducing the time it takes for developers to spin up their own services and development infrastructure
Developed sophisticated pipelines to synchronise changes between multiple Azure tenants, with a single (templated) code base (using Github Actions, Ansible and Terraform)
Contributed ~20 accepted pull requests to the Azure CAF Terraform landing zones (developed by Microsoft)
Top 10 contributor to the framework (both major features and small bug fixes)

May 2020 - Jun 2021

DevOps Engineer

Digidentity

https://digidentity.eu

Ansible
Python
Bash
AWS
Kubernetes
Helm
Docker
Rancher
K3s
Proxmox
Packer
Terraform
Cloudformation
Nginx
Traefik
Ubuntu
Metallb
Cert manager
Wireguard
Gitlab
Gitea
New Relic
Sentry
Datadog
Quay
Jira
Confluence
PostgreSQL
MySQL

Rebuilt mission critical infrastructure for the identity providers of the British GOV.UK Verify and the Dutch eHerkenning system. These are login portals used by millions of users to safely login to government services with a verified digital identity.

Improved reliability by rebuilding all Kubernetes clusters with EKS, Rancher and GitOps
Built on-premise clusters and infrastructure using Proxmox, Ansible and K3s
Reduced cloud expenses by 15% and cleaned up numerous unused AWS resources
Architected and developed an internal VPN solution using Wireguard on AWS
Improved CI/CD pipelines using Gitlab and Bash
Migrated PostgreSQL databases to Amazon RDS

Nov 2019 - Apr 2020

Graduation Internship

WebIQ

https://webiq.nl

AWS
Google Cloud
Azure
Business case

Graduation internship. Researched, designed and compared different high availability architecture designs on the three biggest cloud providers, using the most suitable cloud services for the PHP based WebIQ CMS.

Evaluated both traditional virtual machine and modern container-based HA architectures for all clouds
Utilized drawing tools to create detailed architectural designs while considering relevant features of the selected cloud services
Compared SLA terms and pricing of several managed hosting companies to uncover the most suitable candidate
Successfully completed my studies and received a grade of 8 on my thesis

Projects (3)

thairentalmarket.com

May 2018 - Jan 2019

https://thairentalmarket.com

CSS3
HTML5
PHP
Drupal 8
Hetzner

Startup project I worked on during my study. Thairentalmarket.com is an online platform for discovering and comparing rental products and services in Thailand. It allows users to compare prices from multiple providers at a glance. Discontinued development due to lack of time and interest.

Developed an online rental marketplace for the Thai market using Drupal 8
Outsourced content writing and publishing to online freelancers

lakunu.lk

Dec 2018 - Nov 2019

https://lakunu.netlify.app

JavaScript
Vue.js
Nuxt.js
PHP
Decoupled Drupal
GraphQL
Progressive web app (PWA)
Netlify

Startup project I worked on during my study. Lakunu.lk is a product review website, developed to discover the best products available in the Sri Lankan market. Lakunu means both "score" and "rating" in the Sinhalese language. The project did not succeed and the original domain has expired.

Developed a product review website for the Sri Lankan market
Used Decoupled Drupal as a back-end and a Nuxt.js front-end with PWA capabilities
Followed entrepreneurship course at UtrechtInc

affiliate.lk

Feb 2017 - Nov 2019

https://affiliatelk.netlify.app

JavaScript
React.js
Next.js
Google Cloud
Docker
Kubernetes
Netlify

Startup project I worked on during my study. Affiliate.lk was the first affiliate marketing network based on the island of Sri-Lanka. Affiliate partnerships allowed e-commerce businesses to market their goods and services through commission-based promotions, primarily with the help of social media influencers on platforms such as YouTube, Instagram, and TikTok. The project did not succeed and the original domain has expired.

Lived in Sri Lanka for a year in an effort to pioneer the affiliate marketing model
Responsible for all IT related activities such as developing the website and customizing the affiliate network software
Learned many typical startup lessons

Education (2)

2014 - 2020

Bachelor's degree

Business IT & Management

HU University of Applied Sciences Utrecht (Hogeschool Utrecht)

BPMN
CMMN
DMN
Business Rules
Business Intelligence
Enterprise Architecture
ArchiMate
TOGAF
PHP
Python
SQL

Finished bachelor's degree in Business IT & Management (also known as an information systems degree). Core theme of the degree is related to the proper alignment between Business & IT. Learned about analysing, advising and designing business strategy, processes and systems. Scored an 8 for my graduation thesis.

2011 - 2013

Propaedeutic degree

Communication & Multimedia Design

Hogeschool van Arnhem en Nijmegen (HAN)

Product Design
Design Thinking
Photoshop
Illustrator
InDesign

Completed the first year (propaedeutic degree). Core theme of this degree is related to creativity, design and product management. This was not the right study for me.