Creating Packer and Ansible Code for Immutable Infrastructure EC2 Instances based on Ubuntu 18.04/bionic.

Creating Ansible and Terraform code for creating Database Clusters with Individual PostgreSQL Instances running as isolated Containers.

• Getting an e-Commerce platform ready for Black Friday weekend load
• Performance Analysis, Load Testing, Configuration review
• Making recommendations and applying to the production code and configuration
• Migration to HAProxy Enterprise, improving reliability of proxies

• Maintaining, Extending and Troubleshooting LEMP (Linux, Nginx, MySQL, PHP) applications (Laravel / Lumen) running on AWS
• Developing Ansible roles for use with packer for creating Amazon Machine Images (AMI), being automatically built with Jenkins (Pipeline as Code using Groovy)
• Assisting in database migration from EC2 Instances to AWS RDS
• AWS cost optimization (scaling policies, instance sizing)
• Helping new employees with onboarding

• Writing comprehensive Ansible playbooks for installing various applications (Atlassian Stack, Owncloud, LAMP) on virtual machines on premises as well as AWS and Azure
• Troubleshooting Java Applications (Atlassian stack)
• Building a CI Pipeline for Ansible playbooks on Gitlab
• Automating deployment of Jenkins with Ansible

• Optimizing of legacy database infrastructures based on MySQL and complex stored procedures
• Migration of ETL processes from Bash scripts / Stored Procedures to Python, Airflow and docker
• Preparation of database migration to PostgreSQL on AWS

• Assisting in Migration to AWS
• Creating CloudFormation Templates
• Moving Databases to AWS RDS
• Creating and upgrading ansible playbooks
• Troubleshooting of Problems with MySQL databases, Redis Key Value Stores
• Assisting Teams in troubleshooting PHP (Laravel/Lumen) based Applications

• Migration from puppet based configuration management to Ansible
• Producing comprehensive Documentation for effective use of Ansible
• Iteratively moving J2EE Applications towards current best practice approaches
• Re-tooling build processes on Jenkins to use Pipeline as Code (Groovy)

• Automation of common operations tasks through Ansible
• Building a highly available virtualization system based on libvirt and ceph
• Building highly available MariaDB/Galera clusters
• Troubleshooting problems related to application performance throughout the whole stack
• Python development for custom modules to libvirt / ansible
• Supporting developers in system operations tasks
• Enabling Teams to use automated deployment solutions

• Automation of common operations tasks through Ansible
• Building a highly available virtualization system based on libvirt and ceph
• Building highly available MariaDB/Galera clusters
• Troubleshooting problems related to application performance throughout the whole stack
• Python development for custom modules to libvirt / ansible
• Supporting developers in system operations tasks
• Enabling Teams to use automated deployment solutions

• Setup highly available evaluation cluster for virtual machine hosting

• Migration of MySQL Cluster (NDB) based database to multi master replication for a PHP/Java based high traffic application (real time bidding)
• General application troubleshooting
• Ongoing support / monitoring
• real-time linux work, low level kernel optimization, network optimization for +200kpkts/s

• Setup Database and Web Cluster for Website relaunch
• Planning and Preparation for new Firewall and Network
• Preparation for payment migration to SEPA
• General consulting for employee transition
• Assisting development of new application

• Administration of multiple (20+) Linux based servers (Webserver, Database, Application Server, Cache Server, Mail server)
• Maintenance of legacy applications
• Assisting development of new application
• Migration of legacy systems and hardware to virtualized, highly available environment
• Monitoring of daily operations
• Restructuring of payment systems

• Restructuring of LAMP based servers into nginx/php-fastcgi clusters for high performance ad serving / tracking (10.000+ request/sec.)
• Setup of highly available MySQL database storage
• Setup of redis key-value store
• Consulting on software architecture

• Custom website development based on Content Managment Systems
• Administration of multiple Linux / FreeBSD based Servers
• Software Development
• Cross-media integration of website content