Required software development freelancer for Zabbix SSH communication with Raspberry PI (external network) job

We like to run a small aplication on respberry PI (Zabbix), which will communicate with our server, so we can access our raspberry Pi remote through SSH, so we can send commands.
Server side:
List of online raspberry PIs (the names of the raspberry PI Units)
Can select and get access to the command line (two way, we need to see the reply message also), so we can communicate with individual raspberry PI

Raspberry PI
Small aplication that sends every hour if raspberry Pi is online. The raspberry PI's are running on external network (different locations)

Skills & Expertise Required

software development