Main programming languages are JavaScript, TypeScript, also have quite much practice with Bash, Python and also worked with C++ (primarily OpenCV library), Java, Rust, Lua. And, for sure HTML (and its preprocessors like EJS and Pug), CSS (and SCSS)Frameworks: React (and Material UI), NestJS, Next.js, Express.js, Fastify, TypeORM and SequelizeTesting libraries: Chai & Mocha, Jest & EnzymeSQL and NoSQL: PostgreSQL, Redis and MongoDB, ClickHouse, browser's IndexedDBDevOps & CI/CD practice is Git, Docker, Docker Compose, Kubernetes, Azure, AWSAlso I have an experience with NGinx, SSE, Websockets (incl. SocketIO), REST, AMQP/MQTT(s) (via RabbitMQ), SSL certificates/keys/chains creation/verifying, making some simple desktop applications with Electron and some other stuff