Matīss

In no particular order of importance or preference, Java, PHP, JavaScript, Python, Ruby, Kotlin, Groovy, C#, Vue.js, React, HTML5 / CSS3, Sass/SCSS, Webpack, MySQL, MongoDB, ClickHouse, PostgresSQL, ElasticSearch, Solr, Redis, Xodus, H2, Hazelcast, Atomix, Symfony, Vert.x, Spring, Express, Android, Electron, Linux, Ansible, Puppet, Lucene, RabbitMQ, ZeroMQ, MQTT, Kafka, Consul, Terraform, Vagrant, Docker, Sentry, Nexus, AWS, Google Cloud, PM, BI, CPM/BPM, BPI and more.