PHP (Laravel, Symfony, YII)
MySql, PostgreSQL, MongoDB
RabbitMQ, Memcached, Redis, Sphinx, Elasticsearch.
GIT, Mercurial, SVN
TDD, BDD.
CI/CD, Jenkins, kubernetes, Helm, Terraform
Newrelic, Kibana
CentOS, Ubuntu/Debian, OSX. Vagrant, Docker, AWS, Lambada.
APIs: Facebook, Twitter, VK, JIRA, Slack, Telegram, MsTeams, Google, Chargbee, Stripe