Position: Senior JavaScript Developer (AdTech)
Company: Sigma Software Group
Category: JavaScript
Experience required: 5y
English level: intermediate

**CUSTOMER**
We are working with a US-based company that operates in AdTech domain. It has an innovative startup that has grown into a huge product in the market, working with a variety of well-known clients. 
**
PROJECT**
The project develops a cybersecurity solution protecting revenue and user experiences across all platforms. 
**
RESPONSIBILITIES**
-Create technical designs for new, innovative solutions 
-Take ownership over the features and implement them 
-Maintain the heart of the solution – script, i.e. monitor the new versions of browsers, updates of extensions or other 3rd party components that may impact script work 

**REQUIREMENTS**
-A high degree of fluency in vanilla JavaScript ES6, with knowledge of modern techniques as well as core JavaScript concepts 
-Strong experience in responsive and cross-browser web application development 
-Ability to analyze and refactor legacy code 
-Good knowledge of CSS and its pre-processors 
-Experience in writing high-quality, robust code involving approaches such as unit testing, code coverage, and static code analysis 
-Experience in modern frontend build tooling (Webpack, ESlint, NPM) 
-Experience with GitHub, code reviews, pull requests, and agile methodologies  
-At least Intermediate level of English