- Ubuntu 18.04.4 LTS, ClamAV, Vagrant, VirtualBox and VMWare
- Redis Replication: one Master VM and 2 Standby VMs, tuning Redis configuration for heavy traffic load
- Redis Failover and Switchback by Redis Sentinel
- HAProxy version 2.1.2, Keepalived version 2.0.20: Redis High Availability and Zero Downtime
- NodeJS: Promise, Bluebird, Babel and Axios
- PM2: Process manager for NodeJS
- Nginx, Nginx Load Balancer and Healthcheck: tuning Nginx configuration for heavy traffic load
- High Availability and Zero Downtime for Nginx, NodeJS and PM2 by Keepalived
- PRTG Network Monitor
- JMeter load tests















