Senior Front-End Developer to work on a legacy ASP.NET MVC Modernization & UI Performance Enhancement.

S.i. Systems · Calgary, Alberta, Canada

Location

Calgary

Job Type

Contract

Posted

March 19, 2026

Job Description

Our client is looking for a Senior Front-End Developer to work on a legacy ASP.NET MVC Modernization & UI Performance Enhancement .
Must‑Haves
5+ years of front-end development experience building enterprise-grade web applications
Strong expertise with JavaScript, jQuery, Bootstrap, HTML5/CSS3, and responsive UI frameworks
Proven success modernizing legacy ASP.NET MVC (Razor) front-ends and improving server-side rendering performance
Hands-on experience integrating and consuming REST APIs, including authentication handling and error states
Deep experience optimizing large data grids/tables (e.g., DataTables) including server-side pagination, filtering, and search for datasets in the hundreds of thousands to millions
Strong understanding of cross-browser compatibility, WCAG accessibility standards, and UI/UX best practices
Ability to analyze, refac...
        

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