Job responsibilities:

Job Requirements:

Strong knowledge of JavaScript (ES6, ES7, ES8), HTML, CSS preprocessors. Experience with flowjs and/or typescript strongly typed elements would be a plus
Deep knowledge of one from those web frameworks: React JS, Angular, Vue JS
Understanding how JavaScript interacts with the browser and web context, what are the limitations and why. Knowledge of issues related to cross domain, ajax calls, cookies, etc.
Knowledge of Web Workers API and service worker features
Knowledge of Channel Messaging API
Knowledge of security model of modern web browsers (CORS policy, permissions to various actions, etc)
Knowledge of the API for storing data inside browsers indexedDb, localStorage
Understanding of JS engine asynchrony, promises, async\await, error handling, closures, fetch API
Understanding the TCP\IP network stack, understanding the HTTP, HTTP2 protocol
Understanding how webpack works Experience writing custom configurations would be a plus.
Knowledge of architecture of modern web browsers. Java script event-loop, rendering pipeline.
Experience with various developer tools to profile Java script execution, profile and found bottlenecks in site performances
Basic knowledges of backend architecture
Knowledge of nginx web server

Experience in backend development for own frontend
Understanding what redis, cassandra, Rabbitmq, Vertica db, Galera db, etc. are for. - we use them on the backend
Experience with monitoring and logging systems (grafana, ELK)
Understanding Microservice Infrastructure
Linux knowledge at user level
The desire to make a cool product and be responsible for it