Senior Dotnet Developer

First Line Software; Colombia; Hybrid; COP 80,096,115 - 140,168,201; Full time

Benefits offered by this job

Flexible working hours

Corporate English classes

Workation program

Access to training programs and certifications

Job summary

A software solutions company based in Colombia is seeking a Senior .NET Developer to design and develop scalable, cloud-based backend systems. The ideal candidate will have strong skills in C#, .NET technologies, and Azure services, along with a passion for building impactful software. This role offers the flexibility of remote, on-site, or hybrid work, along with opportunities for training and development.

Qualifications

• Strong experience with C#, .NET Core / Framework, Entity Framework, and LINQ.
• Proficiency in Web API development and RESTful services.
• Solid knowledge of T-SQL and relational database design.
• Hands-on experience with Azure services.
• Familiarity with Swagger / OpenAPI for API documentation.
• Skilled in Git version control and CI/CD using Azure DevOps or GitHub Actions.
• Practical experience with Docker for containerization.

Responsibilities

• Design, develop, and maintain scalable backend solutions.
• Build and integrate APIs to support web and mobile applications.
• Optimize SQL queries and database performance.
• Implement CI/CD pipelines and maintain deployment workflows.
• Write clean, testable, and maintainable code following SOLID principles.
• Participate in code reviews and agile ceremonies.
• Stay updated with the latest trends in .NET and Azure technologies.

Skills

C#

.NET Core / Framework

Entity Framework

LINQ

Web API development

RESTful services

T-SQL

Azure services

Swagger / OpenAPI

Git version control

CI/CD using Azure DevOps

Docker

Job description

Get AI-powered advice on this job and more exclusive features.

Direct message the job poster from First Line Software.

At First Line Software, we design and deliver custom software solutions that help global businesses grow, innovate, and stay ahead. Our clients span industries and continents, and our mission is simple: transform complex challenges into powerful, scalable applications.

We are a team of experts who value collaboration, curiosity, and excellence, and we are looking for professionals who share our passion for building impactful software.

About the Role

We are seeking a Senior .NET Developer to join our team and contribute to the design and development of scalable, cloud-based backend systems.

In this role, you\'ll:

• Build and maintain APIs and backend services that power modern web applications
• Work with a modern Microsoft stack and Azure cloud services
• Collaborate closely with other developers, architects, and product teams to ensure our solutions are high-quality, performant, and maintainable

This role is perfect for someone who thrives in fast-moving, collaborative environments and enjoys working across different projects and industries.

Requirements

Must-Have Skills:

• Strong experience with C#, .NET Core / Framework, Entity Framework, and LINQ
• Proficiency in Web API development and RESTful services
• Solid knowledge of T-SQL and relational database design
• Hands-on experience with Azure services
• Familiarity with Swagger / OpenAPI for API documentation
• Skilled in Git version control and CI/CD using Azure DevOps or GitHub Actions
• Practical experience with Docker for containerization

Nice-to-Have Skills:

• Knowledge of Microsoft Fabric and Dapr
• Understanding of database administration and migrations (Code-first & DB-first)

What Youll Do

• Design, develop, and maintain scalable backend solutions
• Build and integrate APIs to support web and mobile applications
• Optimize SQL queries and database performance
• Implement CI/CD pipelines and maintain deployment workflows
• Write clean, testable, and maintainable code following SOLID principles
• Participate in code reviews and agile ceremonies
• Stay updated with the latest trends in .NET and Azure technologies

Responsibilities

• Design, develop, and maintain robust Web APIs using .NET technologies
• Build scalable backend services within a cloud-native architecture
• Collaborate with frontend developers and DevOps engineers to deliver end-to-end solutions
• Optimize application performance and database queries
• Ensure code quality through testing, code reviews, and clean architecture principles
• Contribute to CI/CD workflows and participate in deployment processes
• Monitor, debug, and improve system performance and reliability

The FLS Difference

• Our modern stack projects are the right mix of exciting and challenging
• Gain access to our diverse range of training programs, courses, and certifications
• Choose your work style - remote, on-site or hybrid in one of our offices. We offer the freedom of flexible working hours
• Enhance your language skills with our corporate English classes
• Work from anywhere and explore the world with our Workation program

Seniority level

• Mid-Senior level

Employment type

• Full-time

Job function

• Information Technology
• Industries: Software Development, IT System Custom Software Development, IT Services and IT Consulting

We are an equal opportunity employer and value diversity. All employment is decided on the basis of qualifications, merit, and business need.