Cloud
AWS, Azure, GCP
Continous Integration & Delivery
Gitlab, Jenkins
Automation & Configuration
Ansible, Terraform
Kubernetes Distributions
Azure Kubernetes Service, Google Kubernetes Engine, Amazon Elastic Kubernetes Engine
Web Development
OpenCart, Wordpress
Database
Cassandra, MongoDB, MySQL, PostgreSQL, Redis
Storage
ZFS, GlusterFS, Amazon S3, Hadoop HDFS
Quality Assurance
Jira, Confluence, OpenProject, GitLab
Monitoring
Prometheus, Zabbix, Grafana, Nagios, Google Stack Driver