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Senior Front End Developer
Critical Mass ·
San José,San José,Costa Rica
Negociable
Remoto
You Have: Advanced English Proficiency (B2+ reading, writing, and conversation) At least experience working with Front-End technologies (ES6/HTML/CSS/JavaScript) Excellent knowledge of recent development practices (Mobile First, MVC, Object Oriented development) Fluency in at least one major mainstream JavaScript library and/or framework (eg. jQuery, Angular, React, etc...) Experience configuring FE builds (npm, gulp/grunt), a11y and web performance Work experience with cross-br