Backend Developer

Gestamp; Madrid; Presencial; EUR 40.000 - 65.000; Jornada completa

Descripción de la vacante

A leading company in the automotive sector seeks a Senior Backend Developer in Madrid to enhance initiatives in Generative AI and cloud-native back-end services. You will design robust backend systems using Azure Semantic Kernel and Apache Airflow, ensuring effective collaboration with Product Owners and business stakeholders. The ideal candidate will have strong backend development skills in Python and .NET Core, excellent communication abilities, and a problem-solving mindset.

Servicios

Flexible working hours

Professional development opportunities

Health insurance

Formación

• 4+ years of professional experience in backend development.
• Advanced English (B2+ minimum).
• Proven experience in .NET Core (3.1+, ideally 6/7).
• Experience with relational databases and logging.

Responsabilidades

• Design and implement backend services supporting generative AI.
• Build and maintain Apache Airflow DAGs for automation.
• Collaborate with cross-functional teams to align technical delivery.

Conocimientos

Python

Backend Development

Apache Airflow

Entity Framework Core

C#

API Integration

Clean Architecture

Microservices

Unit Testing

Herramientas

Docker

Kubernetes

Azure

SQL Server

PostgreSQL

Descripción del empleo

We are looking for a Senior Backend Developer with strong software development experience to help accelerate initiatives in Generative AI , workflow automation , and cloud-native backend services . You will play a key role in delivering robust and scalable backend systems leveraging Azure Semantic Kernel , Apache Airflow , and .NET Core .

The ideal candidate is also a strong communicator with the ability to interact effectively with Product Owners and business stakeholders , helping translate business needs into technical solutions.

Key Responsibilities :

• Design and implement backend services to support generative AI use cases using Azure Semantic Kernel .
• Build and maintain complex Apache Airflow DAGs , including :
• ETL automation and orchestration.
• Integration with internal / external APIs.
• Dependency management, error handling, and retries.
• Custom sensors and dynamic operators.
• Develop and maintain microservices in .NET Core , including :
• RESTful API design and implementation.
• Efficient use of Entity Framework Core and LINQ.
• Clean architecture and patterns such as Repository , Mediator , and CQRS .
• Authentication and authorization (JWT, OAuth2).
• Write unit and integration tests with high-quality standards.
• Collaborate closely with Product Owners, Data Scientists, and cross-functional teams to align technical delivery with business goals.
• Actively participate in agile rituals (refinement, estimation, reviews) contributing with technical feasibility analysis.

Technical Requirements :

Must-Have :

• 4+ years of professional experience in backend development.
• Advanced English (B2+ minimum – able to lead / participate in technical discussions).
• Strong proficiency in Python :
• Automation, API integration, scripting, and data manipulation.
• Solid hands-on experience with Apache Airflow :
• Designing production-grade DAGs.
• Creating custom hooks / operators.
• Working with relational databases (PostgreSQL, SQL Server, etc.).
• Monitoring, logging, and error management.
• Proven experience in .NET Core (3.1+, ideally 6 / 7) :
• Proficient in modern C# (LINQ, async / await, pattern matching).
• Testing with xUnit / NUnit, mocking, and code coverage tools.
• Experience in clean or layered architecture (ideally with DDD principles).

Nice to Have :

• Familiarity with Azure Semantic Kernel :
• Plugins, Memory Store, OpenAI / Azure OpenAI integrations, planners, connectors.
• Experience with Kafka and Azure services (Functions, Service Bus, Blob Storage).
• Docker and container orchestration (Kubernetes or Azure Container Apps).
• CI / CD pipelines using Azure DevOps or GitHub Actions.

Soft Skills & Business Interaction :

• Excellent communication and stakeholder management skills .
• Experience working closely with Product Owners to clarify requirements and prioritize work.
• Ability to translate business needs into clear, feasible technical solutions .
• Strong negotiation skills to manage technical trade-offs and deadlines.
• Proven ability to work collaboratively in cross-functional teams (AI, design, data, frontend, business).
• Proactive, strategic thinker with problem-solving mindset.

Backend Developer • Madrid, Community of Madrid, Spain