Languages and Frameworks:
Ruby (Ruby on Rails),
Javascript (ReactJS, TypeScript, BackboneJS, ExtJS, jQuery),
Python (Django)
Devops and Cloud:
Docker,
Linux,
AWS (EC2, ECS, ElasticBeanstalk, S3, RDS, Aurora, Route53, Lambda, SQS, Dynamodb),
Google (Recaptcha, SSO, Tag Manager)
Databases and In-memory:
Postgres,
Mysql,
Redis,
Mongodb