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JavaScript Frontend Developer

Calabria Group

Job Description

We are looking for a JavaScript Developer who is motivated to combine the art of design with the art of programming. Responsibilities will include building & implementing web client libraries for instrumentation. You will work with both front-end and back-end software engineers to build all client-side logic. You will also be bridging the gap between the client side libraries and the server-side infrastructure, taking an active role on both sides, and defining how the application looks and functions.

Experience: Minimum 5 years


  • Develop client side libraries (JavaScript)

  • Build reusable code and libraries for future use

  • Optimize applications for maximum speed and scalability

  • Assure that user input is validated before submitting to back-end services

  • Collaborate with other team members and stakeholders

  • Troubleshoot client library issues & performance



Skills and Qualifications

  • Strong understanding of JavaScript, its quirks, and workarounds

  • Basic understanding of web markup, including HTML5 and CSS3

  • Should have the knowledge of one or more advanced JavaScript libraries and frameworks such as AngularJS, KnockoutJS, BackboneJS, ReactJS, DurandalJS etc.



  • Good understanding of asynchronous request handling, partial page updates, and AJAX

  • Proficient understanding of cross-browser compatibility issues and ways to work around such issues

  • Familiarity with JavaScript module loaders, such as Require.js and AMD

  • Familiarity with front-end build tools, such as webpack

  • Proficient understanding of code versioning tools, such as Git / Mercurial / SVN



  • Good understanding of browser rendering behavior and performance

  • Familiarity with CDN platforms like Akamai

  • Nice to have familiarity with AWS stack




  • {{List education level or certification you require}

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