This is a remote position.
We are looking for a Senior .NET Full-Stack Developer / English level B2+, with 5–10 years of experience developing, maintaining, and supporting business-critical applications.
The role requires strong experience with .NET 8+, C#, ASP.NET Core, MVC, RESTful APIs, SQL Server, IIS, JavaScript, TypeScript, and at least one modern frontend framework: React, Angular, or Vue.
The candidate will be responsible for custom application development, API integrations, database optimization, deployments, troubleshooting, performance, security, and production support.
Experience with Git, CI/CD pipelines, AWS or Azure, SaaS environments, and enterprise collaboration tools is required.
Role overview
A skilled team member for custom development of applications primarily using .NET / C#, ASP.NET, SQL, and Web technologies. The adecuado candidate will ensure high availability, performance, and security.

Requirements

Technical Skills
In-depth knowledge of the .NET Framework and .NET Core/.NET 8+
Strong proficiency in C# programming
Extensive experience with ASP.NET Core




Solid understanding of MVC (Model-View-Controller) Architecture
Experience in designing and developing RESTful APIs and Web APIs
Strong experience with Microsoft SQL Server
In-depth knowledge of SQL and database query optimization
Experience with IIS (Internet Information Services) Server administration and deployment
Proficient in HTML5, CSS3, JavaScript, and TypeScript
Knowledge of cloud hosting platforms such as AWS and Microsoft Azure
Experience with Web Services and API integrations
Strong database skills, including SQL Server and PostgreSQL

Frontend Technologies & Frameworks
Experience with modern frontend frameworks and libraries:
Vue.js
React.js
Angular
Glide

Reporting Tools
Experience in developing and maintaining reports using:
SQL Server Reporting Services (SSRS)
Crystal Reports

DevOps & Version Control
Experience with CI/CD pipelines and DevOps practices
Proficient in source con

📌 Senior .NET Full-Stack Developer (Colombia)
🏢 Velaio
📍 Colombia