Valencia-Based Senior Backend Architect: GenAI Lead

ISG International Service Group; Valencia; Híbrido; EUR 60.000 - 90.000; Jornada completa

Descripción de la vacante

ISG International Service Group is building a pioneering Generative AI hub in Valencia. You will be among the founding backend engineers, shaping the architecture and infrastructure for an AI-powered platform that redefines financial processes with secure data pipelines and scalable services.

You will implement RESTful microservices, data ingestion, vector search, and multi-agent orchestration while collaborating with a senior, globally distributed engineering team.

Formación

• 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.
• Experience building RESTful APIs and microservices in regulated or high-availability environments.
• Familiarity with vector databases, embeddings and RAG-based architectures.
• Understanding of Agentic AI patterns: multi-agent systems, tool use, orchestration, memory layers.
• Experience with containerisation (Docker / Kubernetes / AKS).
• Proficiency in SQL (Azure SQL, PostgreSQL).
• Strong understanding of security best practices: authentication, RBAC, secrets management.
• Experience with CI/CD pipelines and DevOps practices on Azure.
• Ability to work autonomously in a greenfield, fast-paced environment.
• Fluent English — working language for all technical documentation and ceremonies.
• Location - preferably Valencia, but open to other locations with availability to travel occasionally to Valencia; remote in that case.

Responsabilidades

• Design and build the backend services and APIs that power the Generative AI platform using Node.js or .NET 8.
• 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 via Azure Cognitive Search and LightRAG.
• Create agent tooling using Langchain, Langgraph, FastAPI, A2A, AG-UI and MCP.
• Implement the AIDA orchestration and coordination layer using Mastra.
• Ensure 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 ML.
• Manage secrets and configuration securely via Azure Key Vault.
• Contribute to engineering culture: code reviews, docs, architecture decisions and best practices.

Conocimientos

Backend development

Node.js

.NET 8

Azure cloud

REST APIs

Microservices

AI platform

English fluency

Autonomy

Herramientas

Azure Data Factory

Azure Cognitive Search

Azure OpenAI

Azure Machine Learning

Cosmos DB

Azure SQL / PostgreSQL

Docker / Kubernetes

Langchain / FastAPI

Descripción del empleo

ISG International Service Group is building a pioneering Generative AI hub in Valencia. You will be among the founding backend engineers, shaping the architecture and infrastructure for an AI-powered platform that redefines financial processes with secure data pipelines and scalable services.

You will implement RESTful microservices, data ingestion, vector search, and multi-agent orchestration while collaborating with a senior, globally distributed engineering team.