We are seeking a highly skilled Senior Full-Stack Engineer with strong expertise in ASP.NET (Framework & Core), C#, SQL Server, and modern web front-end technologies. The idóneo candidate is comfortable working in a mature, mission-critical codebase — balancing day-to-day feature work with a structured modernization roadmap (security remediation, dependency upgrades, and migration toward modern .NET).

The role spans the full stack — from server-side C# and SQL Server data layers, through RESTful Web APIs, to browser-side jQuery, Kendo UI, and Bootstrap interfaces (with incremental migration toward Angular) — with a strong emphasis on secure coding, vulnerability remediation, and clean architecture.
Key Responsibilities

Frontend Development
- Maintain and enhance browser-based UI built on jQuery, jQuery UI, Kendo UI, and Bootstrap.
- Lead targeted UI modernization tasks — jQuery 1.x/2.x → 3.7.x upgrade, Bootstrap 3 → 5 migration, Kendo UI version upgrades, and incremental migration of select UI surfaces to Angular + TypeScript.
- Implement responsive,



accessible (WCAG 2.1 AA / Section 508) interfaces using HTML5, CSS / LESS / SCSS.
- Build interactive grids, charts, schedulers, and data-bound widgets using the Kendo UI component suite.
- Write robust client-side validation (jQuery.Validation today; reactive forms / RxJS in the modernized stack).
- Optimize web applications for speed, browser compatibility, and assistive-technology support.

Backend Development
- Design, implement, and maintain backend services across multiple .NET projects (Web, Business, Domain, Framework, and Windows Service layers).
- Build and consume RESTful Web APIs in ASP.NET / ASP.NET Core; design clean contracts, versioning, and documentation.
- Write clean, maintainable C# following SOLID principles and clean architecture patterns; refactor legacy code progressively without disrupting production behavior.
- Build and maintain automated unit and integration tests using xUnit / NUnit; enforc

📌 .NET/ Angular ASP.NET (Colombia)
🏢 Rockcruit
📍 Colombia