JavaScript
API/Data Services: HTTP, GraphQL, REST, Swagger, ActiveMQ, gRPC, WebSockets
Back-end: NodeJS, Python, C#, Java Spring
Cloud/Virtualization: Kubernetes, Docker, AWS EC2, VM Ware
Databases: Neo4j, Postgres, MongoDB, ElasticSearch, Redis, MySQL
Development workflow: Webpack, grunt, gulp, npm, yarn, gradle
+8 more