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# Programista Back-End - Backend Developer .Net

- **Company:** ISG International Service Group
- **Location:** Valencia, Spain
- **Contract:** Permanent contract
- **Skills:** ASP.NET, .NET Framework, Active Directory, Application Programming Interfaces (APIs), Artificial Intelligence, Microsoft Azure, Cloud Storage, Databases, Relational Databases, DevOps, Document Management Systems, Entity Framework, Design of User Interfaces, Python (Programming Language), Key Management, PostgreSQL, Log Analysis, Machine Learning, Metadata, SQL Azure, Node.Js, Role-Based Access Control, Azure Active Directory, Azure Machine Learning, Search Technologies, SQL Databases, Web Applications, Data Storage Technologies, Data Ingestion, Azure Data Factory, Large Language Models, Model Validation, Generative AI, Backend, Fastapi, Build Management, Containerization, AI Platforms, Kubernetes, Cosmos DB, Azure AKS, Virtual Agents, Docker, Key Vault
- **Published:** August 19, 2026
- **Apply:** https://www.buscojobs.com.es/programista-back-end-backend-developer-net-en-valencia-ID-367844498

## About the Role

5+ years of backend development experience in production environments
~ Strong proficiency in Node.js OR .
NET 8 / ASP.NET Core (or both)
~ Solid hands-on experience with Azure cloud services: ADF, Cognitive Search, OpenAI, SQL, Cosmos DB
~ Familiarity with vector databases, embeddings and RAG-based architectures
~ Experience with containerisation (Docker / Kubernetes / AKS)
~ Proficiency in SQL (Azure SQL, PostgreSQL)
~ Experience with CI/CD pipelines and DevOps practices on Azure
~ Fluent English - working language for all technical documentation and ceremonies
~ remote in that case.
Experience with Python / FastAPI for agent tooling layers

## Description

Our client, a top IT consultancy, is partnering with a leading financial services organisation, to build a dedicated Generative AI hub in Valencia.We are looking for a Senior Backend Developer to be one of the founding engineers of this hub.You will help define the technical foundations of an Agentic AI platform built on Azure, contributing from day one to architecture decisions, infrastructure setup, and the delivery of production-grade AI-powered services for the financial sector.Design and build the backend services and APIs that power the organisation's Generative AI platform, using Node.js or .NET 8 (ASP.NET Core / EF Core)Implement data ingestion, chunking, cleaning and quality checks pipelines using Azure Data Factory and Azure Document IntelligenceBuild and maintain vector indexing and semantic search capabilities via Azure Cognitive Search and LightRAGDevelop embedding generation pipelines using Azure OpenAIDesign and manage multi-layer data storage: Azure SQL, PostgreSQL, Azure Cosmos DB (agent memory), Azure Blob StorageBuild and integrate agent tooling using Langchain, Langgraph, FastAPI, A2A, AG-UI and MCPEnsure platform observability and alerting via Azure Monitor and Azure Log AnalyticsImplement evaluation pipelines for LLM outputs using Azure MLApply guardrails and output validation using Azure OpenAI and Azure Machine LearningImplement authentication and RBAC using Azure Active DirectoryManage secrets and configuration securely via Azure Key VaultBackend CoreNode.js or.NET 8 (ASP.NET Core, Entity Framework Core)Azure Data & AI ServicesAzure Data Factory - ingestion, chunking, cleaning, DQ checksAzure Document Intelligence - document parsing and understandingAzure Cognitive Search - vector indexing and semantic searchAzure OpenAI - LLM access, embedding generation, guardrails and output validationAzure Machine Learning - model evaluation and ML guardrailsStorage & DatabasesAzure SQL ·PostgreSQL - relational data and metadata storageAzure Cosmos DB - short-term and long-term agent memoryAzure Blob Storage - file and document storageFastAPI - lightweight API layer for agent toolingMastra - Multi-Agentic Orchestrator (non-Azure, self-hosted)Platform & DevOpsAzure Kubernetes Service (AKS) - agent runtime hostingAzure Active Directory - authentication & RBACAzure Key Vault - secrets and keys managementAzure Monitor · Azure Log Analytics - observabilityAzure App Service · Azure Static Web Apps - UI/UX deployment5+ years of backend development experience in production environments~ Strong proficiency in Node.js OR .NET 8 / ASP.NET Core (or both)~ Solid hands-on experience with Azure cloud services: ADF, Cognitive Search, OpenAI, SQL, Cosmos DB~ Familiarity with vector databases, embeddings and RAG-based architectures~ Experience with containerisation (Docker / Kubernetes / AKS)~ Proficiency in SQL (Azure SQL, PostgreSQL)~ Experience with CI/CD pipelines and DevOps practices on Azure~ Fluent English - working language for all technical documentation and ceremonies~ remote in that case.Experience with Python / FastAPI for agent tooling layersGitHub certificationSpanish language skillsFounding engineer role - shape the architecture and culture of a brand-new GenAI hub from day oneBacked by the organisation's global engineering community, tooling and career development programmesValencia-based hub with a collaborative, senior-weighted teamDirect exposure to the company's transformation agenda and senior stakeholders


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