Mid-Senior .NET Backend Developer (Hybrid)

KCS iT; Lisboa; Hybrid; EUR 45,000 - 65,000; Full time

Benefits offered by this job

Hybrid work model

Free training programs

International projects in Benelux

Job summary

KCS IT in Lisbon is seeking a Middle Senior .NET developer to join a hybrid team. The role demands 4–5 years of software development experience, with at least 3 years in .NET Core/C# backend work, APIs and services.

You will work with REST APIs, WebSockets, and modern auth protocols, contributing to projects across client environments. Ideal candidates have strong OOP, Git, and CI/CD know-how, plus exposure to testing and design patterns.

Qualifications

• 4–5 years of professional experience in software development.
• Minimum 3 years of experience with .NET Core/C# backend development.
• Solid experience with REST APIs and WebSockets.
• Experience with OAuth 2.0, OpenID Connect (OIDC) and SAML.
• Experience with Microsoft Entra ID (Azure AD) is highly valued.
• Strong knowledge of Object-Oriented Programming and data structures.
• Good knowledge of Git, CI/CD processes and DevOps practices.
• Experience with unit testing and automated testing is a plus.
• Knowledge of design patterns is valued.
• Experience with database access technologies and databases such as SQL Server / SQLite is a plus.

Skills

NET Core/C#

REST APIs

WebSockets

OAuth 2.0 / OIDC / SAML

Azure AD / Microsoft Entra ID

OO P / OOP

Git

CI/CD / DevOps

Unit testing / automated testing

SQL Server / SQLite

Tools

Git

Azure DevOps

Job description

KCS IT in Lisbon is seeking a Middle Senior .NET developer to join a hybrid team. The role demands 4–5 years of software development experience, with at least 3 years in .NET Core/C# backend work, APIs and services.

You will work with REST APIs, WebSockets, and modern auth protocols, contributing to projects across client environments. Ideal candidates have strong OOP, Git, and CI/CD know-how, plus exposure to testing and design patterns.