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 Intelligence
Build and maintain vector indexing and semantic search capabilities via Azure Cognitive Search and LightRAG
Develop embedding generation pipelines using Azure OpenAI
Design and manage multi-layer data storage: Azure SQL, PostgreSQL, Azure Cosmos DB (agent memory), Azure Blob Storage
Build and integrate agent tooling using Langchain, Langgraph, FastAPI, A2A, AG-UI and MCP
Ensure platform observability and alerting via Azure Monitor and Azure Log Analytics
Implement evaluation pipelines for LLM outputs using Azure ML
Apply guardrails and output validation using Azure OpenAI and Azure Machine Learning
Implement authentication and RBAC using Azure Active Directory
Manage secrets and configuration securely via Azure Key Vault
Backend Core
Node.js or.NET 8 (ASP.NET Core, Entity Framework Core)
Azure Data & AI Services
Azure Data Factory — ingestion, chunking, cleaning, DQ checks
Azure Document Intelligence — document parsing and understanding
Azure Cognitive Search — vector indexing and semantic search
Azure OpenAI — LLM access,



embedding generation, guardrails and output validation
Azure Machine Learning — model evaluation and ML guardrails
Storage & Databases
Azure SQL ·PostgreSQL — relational data and metadata storage
Azure Cosmos DB — short-term and long-term agent memory
Azure Blob Storage — file and document storage

FastAPI — lightweight API layer for agent tooling
Mastra — Multi-Agentic Orchestrator (non-Azure, self-hosted)

Platform & DevOps
Azure Kubernetes Service (AKS) — agent runtime hosting
Azure Active Directory — authentication & RBAC
Azure Key Vault — secrets and keys management
Azure Monitor · Azure Log Analytics — observability
Azure App Service · Azure Static Web Apps — UI/UX deployment

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
GitHub certification
Spanish language skills

Founding engineer role — shape the architecture and culture of a brand-new GenAI hub from day one
Backed by the organisation's general engineering community, tooling and career development programmes
Valencia-based hub with a collaborative, senior-weighted team
Direct exposure to the company's transformation agenda and senior stakeholders

📌 Programista Back-End - Backend Developer .NET (Valencia)
🏢 ISG International Service Group
📍 Valencia