Backend .NET Developer

Infoser Technological solutions, Hardware, Big Data Experts; Madrid; On-site; EUR 50,000 - 70,000; Full time

Job summary

Infoser in Madrid is seeking a Backend .NET Developer to build and maintain cloud-based backend services. You will design APIs, implement business logic and enable data exchange across systems.

You will work with C#, .NET, Entity Framework and RESTful endpoints, collaborating with technical and business teams across the full development lifecycle. AWS and PaaS experience is a plus.

Qualifications

• Professional experience developing with C# and .NET.
• Experience building REST APIs and integrating systems.
• Hands-on experience with Entity Framework.
• Understanding of backend architecture and microservices.
• Experience working with relational databases.
• Familiarity with testing, documentation and deployment practices.
• Ability to collaborate with technical and business stakeholders.

Responsibilities

• Develop and maintain backend applications using C# and .NET.
• Build and integrate REST APIs and endpoints.
• Connect services to support data exchange and business processes.
• Implement data access using Entity Framework.
• Contribute to shared data models and business logic.
• Write tests and technical documentation.
• Support deployment, stabilization and handover activities.

Skills

C#/.NET

REST APIs

Entity Framework

Microservices

Relational databases

Testing

Documentation

Deployment

Stakeholder collaboration

Tools

AWS

Job description

We are looking for a Backend .NET Developer to build and maintain backend services in a cloud-based environment. You will work on APIs, business logic and integrations between systems, collaborating with technical and business teams throughout the development lifecycle.

What you’ll do

• Develop and maintain backend applications using C# and .NET.
• Build and integrate REST APIs and backend endpoints.
• Connect services and systems to support data exchange and business processes.
• Implement data access using Entity Framework.
• Contribute to shared data models, business logic, and status and event capabilities.
• Write and maintain tests and technical documentation.
• Support deployment, stabilization and handover activities.

Requirements

• Professional experience developing with C# and .NET.
• Experience building REST APIs and integrating systems or services.
• Hands-on experience with Entity Framework.
• Understanding of backend architecture and microservices.
• Experience working with relational databases.
• Familiarity with testing, documentation and deployment practices.
• Ability to collaborate with technical and business stakeholders.

Nice to have

• Experience with AWS and PaaS environments.
• Experience with event-driven systems.
• Experience with OCR or document-processing features.
• Some front-end development experience.