JavaScript, Vue.js, React, Angular, CSS, SVG, PWA, Quasar, Workbox, Cordova, Webpack, Gulp, ESlint, Web APIs, Karma, Mocha, Jest
iOS: Objective-C, Swift, AVFoundation, CoreAnimation, CoreBluetooth, MapKit, ARKit, Rx, Core Data
Android: Java, Kotlin, Rx, Canvas, NDK, Dagger 2, Butter Knife, Gradle, JaCoCo, Robotium, Monkey test, SQLite
JavaScript (NestJS, Loopback, Express) , Python, Restify, Kafka, AMQP RabbitMQ, gRPC, GraphQL, MQTT (Mosquitto), Node.js, Mocha, Sinon, Chai, Django, DDD, ESLint, Redis, PostgreSQL, MongoDB, Memcached, MySQL, SQLite