C# Software Developer

We are growing. And we are looking for talented people.

At Decskill, we believe that technological excellence is driven by human talent.

We are an IT consulting company with more than 10 years of consolidated experience in the market, focused on building long-term relationships with both our clients and our people. Today, we are a community of over 800 professionals, working from Lisbon, Porto, and Madrid, contributing to impactful technology initiatives.

As part of the Astek Group, we combine a strong local culture with a global presence, being active in around 23 countries across 4 continents. This allows us to offer an international context, diverse challenges, and long-term career opportunities, while staying close to our teams.

We are looking for a C# Senior Developer!

Responsibilities:

• Develop and maintain web applications using C# and ASP.NET / ASP.NET Core.
• Design and implement backend functionalities using Entity Framework or other ORM frameworks.
• Develop and maintain web services and REST APIs.
• Work with SQL Server databases, including database queries and data management.
• Develop and maintain frontend components using HTML, CSS, JavaScript and modern frameworks such as Angular, React or Vue.js.
• Manage application hosting and deployment in IIS (Internet Information Services).
• Implement authentication and authorisation mechanisms using ASP.NET Core Identity or integrations with Azure Active Directory.
• Apply security best practices to protect applications against common vulnerabilities, including SQL Injection, Cross-Site Scripting (XSS) and Cross-Site Request Forgery (CSRF).
• Use version control and development tools to support code quality and collaboration.
• Contribute to application architecture and design, including the MVC (Model-View-Controller) pattern.
• Collaborate with technical teams to deliver reliable, secure and maintainable solutions.

Requirements:

• Strong experience in C# and Microsoft technologies, particularly ASP.NET and/or ASP.NET Core.
• Knowledge of IIS and web application hosting.
• Experience with Entity Framework or other Object-Relational Mapping (ORM) frameworks.
• Experience with SQL Server; knowledge of other databases such as MySQL or PostgreSQL is a plus.
• Familiarity with Visual Studio, Visual Studio Code and SQL Server Management Studio (SSMS).
• Frontend development knowledge, including HTML, CSS and JavaScript.
• Experience with modern JavaScript frameworks such as Angular, React or Vue.js.
• Experience with Git and Azure DevOps for version control and development workflows.
• Knowledge of authentication, authorisation and secure application development practices.
• Understanding of web application architecture, MVC and REST APIs.
• Ability to work collaboratively, solve technical problems and contribute to high-quality software delivery.
• Availability to work in a hybrid model, with 3 days per week in the office .

What you can expect from us

• Long-term projects with national and international context, where applicable.
• Opportunities to grow technically and professionally.
• A people-first culture, focused on transparency and trust.
• Teams that value ownership, collaboration and stability.

Are you looking for an environment that values curiosity and commitment? Here, your contribution has real impact and individual growth is taken seriously.

Find with us the right opportunity to grow!

If you’re interested in this opportunity, please send your CV to [email protected] with reference “CA/C#” .

Thank you! 😊

Decskill is committed to equality and non-discrimination with all our talents. We recruit and promote talent based on diversity and inclusion, regardless of age, gender, ethnicity, race, nationality, or any other form of discrimination incompatible with the dignity of the human being.