? Information about client

We’re working with a technology client with international presence that is expanding its team and opening new roles.
They’re looking for curious, autonomous people who thrive in fast‑moving, integral environments.

? Job description:

We’re looking for a Senior Full‑Stack Engineer with strong experience in ASP.NET (Framework & Core), C#, SQL Server, and modern web front‑end technologies.

The role involves working in a mature, mission‑critical codebase while contributing to a long‑term modernization roadmap (security remediation, dependency upgrades, and migration toward modern .NET).

? Responsabilities
- Maintain and enhance UIs built with jQuery, Kendo UI, Bootstrap, and lead upgrades (jQuery → 3.7, Bootstrap 3 → 5, Kendo UI updates, and gradual migration to Angular + TypeScript).
- Build responsive, accessible interfaces (WCAG 2.1 AA).
- Develop backend services across multiple .NET layers; build/consume REST APIs in ASP.NET / ASP.NET Core.
- Write clean, maintainable C# following SOLID and clean architecture; refactor legacy code safely.




- Implement automated tests (xUnit / NUnit) and maintain strong regression coverage.
- Work with Entity Framework, ADO.NET, and design efficient SQL Server schemas, queries, and stored procedures.
- Support integrations (QuickBooks, Magick.NET, log4net, JWT auth, XML signing, BouncyCastle, WebDAV).
- Drive security and dependency remediation (SCA scans, CVE triage, package upgrades).
- Contribute to the .NET Framework → .NET 8/10+ migration

? Must Have
- 5+ years building production .NET applications — strong command of C# and the .NET ecosystem (Framework & Core).
- Hands-on experience with ASP.NET / ASP.NET Core Web API and designing RESTful services.
- Solid experience with SQL Server — schema design, T-SQL, stored procedures, indexing, and query optimization.
- Proficient in JavaScript / TypeScript with hands-on experience in jQuery-based applications and component libraries such as Kendo UI and B

📌 FullStack .NET / Angular Senior (Colombia)
🏢 Rockcruit
📍 Colombia