> Markdown version of [/jobs/ext/4598131-backend-net-developer](https://www.wearedevelopers.com/jobs/ext/4598131-backend-net-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Backend .NET Developer

- **Company:** Infoser Technological solutions, Hardware, Big Data Experts
- **Location:** Madrid, Spain
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Application Programming Interfaces (APIs), Amazon Web Services, Business Logic, Cloud Computing, Data Security, Data Sharing, Relational Databases, Electronic Data Interchange (EDI), Entity Framework, Platform as a Service (PAAS), Software Architecture, Systems Integration, Backend, Event Driven Architecture, Front End Software Development, Restful APIs, Microservices
- **Published:** November 6, 2026
- **Apply:** https://www.jobleads.com/es/job/backend-net-developer--madrid--e769de44e2fa0663fb19312a86b0f8923

## About the Role

* 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.

## 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.