Programming languages:
Ruby (Rails),
Go,
Python,
Bash,
Perl
Software tools:
Git,
Containers (Docker/LXC),
K8s / Red Hat OCP,
Ansible,
Terraform,
Travis CI,
Jenkins
Databases:
PostgreSQL,
SQLite
Data Formats:
JSON,
YAML,
XML
Miscellaneous:
Linux,
Linux Networks,
REST APIs,
Cloud (IBM,AWS,GPC,Azure,DigitalOcean),
PowerVM,
KVM,
IPMI,
PXE,
DNS