Projects

Deliverables and Results

• Designed and developed a self-service platform for automated VM provisioning with middleware, based on microservices and workflow automation

• Developed the self-service portal using Ruby (Ruby on Rails) and JavaScript (Stimulus)

• Designed and implemented microservices using Ruby (Sinatra)

• Implemented automated VM upgrade and patching mechanism

• Set up unit testing and ensured code quality and coverage

• Designed and optimized software lifecycle and release processes

• Designed and implemented container platform architecture for 125+ Kubernetes and Docker Swarm clusters on Mirantis MKE, including hybrid deployments on VMware vSphere and Microsoft Azure

• Automated and optimized platform components such as PostgreSQL, NFS, and MinIO

• Developed and evolved Puppet modules for automated configuration management across 1,600+ VMs (Linux and Windows)

• Integrated infrastructure and networking components including VMware vSphere, F5 BIG-IP, Infoblox DNS, Windows DNS and Azure DNS

• Implemented and automated virtual F5 BIG-IP load balancers for complex network segments and Zero Trust micro-segmentation

• Set up and optimized GitLab Enterprise and CI/CD pipelines

• Integrated Azure services, including AKS, into the self-service platform

Deliverables and Results

• Developed a deployment platform (based on Jenkins)

• Developed a generic deployment pipeline for 50+ apps, configurable per app

• Developed an Ansible, Capistrano and Kubernetes handler that are used by the generic deployment pipeline

• Integrated the Semaphore build platform with the deployment platform for deployment automation

• Integrated Slack with the deployment platform

• Created and implemented a Kubernetes container platform design

• Setup Kubernetes clusters for running Docker containers

• Developed a toolset for managing Rancher and Rancher managed Kubernetes clusters

• Realized the organization-wide rollout and adoption of the deployment platform for 10+ development teams

Deliverables and Results

• Set up Amazon AWS EKS container platforms for running Docker containers

• Set up on-premises Kubernetes container platforms for running Docker containers

• Implemented centralized logging and monitoring using Fluentd, Elasticsearch, Kibana, Prometheus, and Grafana

• Developed Jenkins CI/CD pipelines for blue/green deployments of main and feature branches

• Migrated the Chef environment to Docker on the Kubernetes container platforms

• Migrated the Vagrant development environment to Minikube

Deliverables and Results

• Designed and implemented a modern, automated multi-cloud infrastructure environment

• Developed modular Puppet building blocks and integrated community modules for the consistent installation, configuration, and state management of 300+ virtual servers (VMware vSphere)

• Defined a code standard and implemented an automated CI/CD pipeline for stable infrastructure changes

• Developed a unified orchestration process in StackStorm for the automated deployment of DTAP environments

• Implemented zero-downtime deployment jobs with Python via Jenkins and StackStorm

• Implemented auto-scaling driven by dynamic service discovery

• Designed and implemented a centralized, datacenter-redundant log management platform (ELK stack) and advanced metric dashboards (Prometheus / Grafana)

• Implemented service monitoring with Sensu

• Automated the end-to-end backup and recovery process through orchestration workflows

• Migrated a manually managed F5 load balancer to a fully Puppet-managed HAProxy load balancer

• Initiated the migration from on-premises to the AWS cloud

• Implemented a site-to-site VPN connection between the on-premises datacenter and the AWS cloud

• Transferred knowledge through targeted workshops to upskill internal engineers, while serving as a strategic sparring partner for the Solution Architect

Deliverables and Results

• Migrated 250 manually configured Proxmox OpenVZ containers to 400 automated CentOS 6 VMs within the Schuberg Philis CloudStack cloud

• Implemented Infrastructure as Code (IaC) using Terraform for the structured provisioning and management of all cloud components

• Developed standardized and reusable building blocks using the Chef configuration management tool, designed for flexible, attribute-based configuration per application

• Delivered a stable and automated infrastructure capable of supporting a high-traffic website with 500,000 daily visitors

• Automated deployment processes via the Jenkins platform, utilizing Capifony and Capistrano to achieve zero-downtime deployments

• Migrated traditional cron jobs to a centralized system in Jenkins, significantly increasing control over automated periodic tasks through dashboards and notifications

• Designed and implemented standardized CI/CD pipelines for automated testing, real-time insights into code quality, and deployments to support nine Scrum teams consisting of seventy developers

• Developed a cross-platform, multi-machine Vagrant box that allowed developers to flexibly distribute middleware across one or more virtual machines based on their needs

• Developed tooling that enabled custom testing environments to be provisioned per development team using Terraform

Deliverables and Results

• Designed and developed a REST API using Apigility (PHP Zend Framework) to centralize database interaction and transition from a database model to a domain model

• Implemented Doctrine 2 ORM within the REST API for efficient management and optimal performance of a large-scale database structure

• Implemented OAuth2 authentication within the REST API

• Configured the REST API with HAL+JSON responses and JSON input processing to standardize communication between applications

• Established the application infrastructure on Ubuntu Server 14.04 behind a load balancer to improve scalability and availability

• Developed an object-oriented API client based on Guzzle 3 and Guzzle Service Description to streamline integration within the existing Zend Framework 2 customer portal

• Set up the CI/CD environment using Jenkins, including the integration of Jira authentication and Stash (Git) for streamlined version control

• Implemented a testing framework and developed unit tests

Deliverables and Results

• Redeveloped the technical architecture from scratch and successfully migrated the Dizzie.nl book community platform

• Developed backends for various web applications using PHP Zend Framework 2 and Doctrine ORM 2

• Developed responsive frontends for various web applications using Compass/SASS, CoffeeScript, jQuery, and AJAX

• Developed an automated CI/CD pipeline using Jenkins and Capistrano, including automated unit and functional testing via Selenium

• Implemented a standardized local development environment based on Vagrant

Deliverables and Results

• Realized the EMS application, an online platform for the fully automated handling of insurance claims based on straight-through processing (STP)

• Developed user-friendly and interactive frontend elements using JavaScript and jQuery

• Developed flexible, dynamic user interfaces featuring panel layouts in Apache Velocity

• Developed web pages using HTML and CSS based on wireframes and visual designs

• Integrated frontend components with the backend models of the Be Informed 4 framework via the available behavior profiles

Deliverables and Results

• Developed a completely new portal featuring a clear, scalable architecture to eliminate technical debt and significantly enhance performance

• Architected the entire application structure utilizing Zend Framework 2 and Doctrine 2 ORM to maintain a strict separation between the domain model and the MySQL database

• Implemented a Role Based Access Control (RBAC) system with restricted-by-default controller actions dynamically mapped to navigation menus

• Designed a structured client-side (JavaScript) to server-side (PHP) interaction flow

• Developed multiple complex business functionalities to support core company operations

• Guided the development team as Senior Developer through code reviews, architectural guidance, and proactive knowledge sharing on Zend Framework 2 and Doctrine 2

• Configured the technical infrastructure and development environment using PHP 5, Nginx, Subversion, Ubuntu Server, and NetBeans

Deliverables and Results

• Engineered a generic Interactive Whiteboard web application for interactive use by teachers across laptops, touchscreens, and beamers

• Developed a Symfony 2 (PHP) REST API to manage data processing and persistent storage

• Implemented a dynamic frontend architecture using JavaScript (jQuery), HTML5, and CSS

• Developed XML import functionality to parse and display diverse teaching methods and educational content

• Created various interactive screen layouts and didactic practice modules for classroom engagement

• Implemented asynchronous data exchange using AJAX and JSON data models between the frontend and backend API

• Configured and deployed the web application within a CentOS (Red Hat) Linux 6 server environment

Deliverables and Results

• Developed a REST API using PHP and Symfony 2 to support the public website, internal booking application, and future third parties

• Developed integrations with PHP and Guzzle between the API and external systems, including Amadeus for booking cruises, flights, and hotels

• Implemented data storage in MySQL via Doctrine 2 ORM and configured caching with Varnish

• Implemented search functionality for cruises based on Solarium, Solr, and Lucene

• Integrated Swagger UI and Swagger-php for REST API documentation and testing capabilities

• Developed a web scraper for Zoover.nl to collect hotel ratings and integrate them into the public website

• Configured a Jenkins CI server on CentOS Linux for automated unit tests and quality assurance