Tech specs

Languages:

Javascript (ES6+, CLJS, TypeScript, JSX)
Python
Java (8, Scala, Clojure, Groovy)
C# (.NET 4+, F#)
PHP
Shell/Bash/zsh
HTML (Jade, HAML)
CSS (SCSS, Less, Stylus)
Obj-C (+ Swift)

Frameworks:

Angular (1, 2)
React
Aurelia
Kendo
jQuery
Lodash
Ramda
Redux
Django
Flask
Spring
Akka
Bootstrap
Foundation
Laravel
WordPress
msgpack
GraphQL
D3
Highcharts
Ionic (1, 2)
VueJS

Build:

Gulp
Grunt
NPM (+ Yarn, Bower, Jam, JSPM)
Make
Maven
Grails
Gradle
Ant
Lein
Composer
Docker
Ansible
Chef
Puppet
Terraform
Cloud Formation

Systems:

AWS
GCP
Azure
Lambdas
DynamoDB
BigTable
Redshift
Redis
Cassandra
Cloudera
SQL
Elastic
SQS
RabbitMQ
SNS
MongoDB
MQTT
Nginx
HA Proxy
Neo4j