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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Backend Developer - **Company:** ISG International Service Group - **Location:** Valencia, Spain - **Contract:** Permanent contract - **Skills:** ASP.NET, .NET Framework, User Authentication, Microsoft Azure, Cloud Storage, Code Review, Databases, Relational Databases, DevOps, Document Management Systems, Entity Framework, Python (Programming Language), Key Management, PostgreSQL, Log Analysis, SQL Azure, Node.Js, Role-Based Access Control, Azure Machine Learning, Search Technologies, SQL Databases, Data Ingestion, Azure Data Factory, Large Language Models, Multi-Agent Systems, Model Validation, Generative AI, Fastapi, Containerization, Kubernetes, Cosmos DB, Virtual Agents, Restful APIs, Docker, Microservices - **Published:** August 10, 2026 - **Apply:** https://www.jobleads.com/es/job/ea9dc873c77db98414202294a9c8d9abd ## 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 * 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., * Experience with Python / FastAPI for agent tooling layers * Knowledge of Langchain, Langgraph or similar LLM orchestration frameworks * Familiarity with MCP (Model Context Protocol), A2A or AG-UI protocols * Prior experience in a hub or centre-of-excellence environment * Background in financial services, banking or fintech ## Description * 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 * Build and integrate agent tooling using Langchain, Langgraph, FastAPI, A2A, AG-UI and MCP * Implement the AIDA orchestration and coordination layer using Mastra (Multi-Agentic Orchestrator) * 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 * Manage secrets and configuration securely via Azure Key Vault * Contribute to the technical culture of the hub: code reviews, documentation, architecture decisions, and engineering best practices * Node.js or.NET 8 (ASP.NET Core, Entity Framework Core) * 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, * Founding engineer role - shape the architecture and culture of a brand-new GenAI hub from day one * Work at the cutting edge of Agentic AI applied to real financial services use cases * Backed by the organisation's global 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 ## Related Videos - [Agentic AI - From Theory to Practice: Developing Multi-Agent AI Systems on Azure](https://www.wearedevelopers.com/videos/1532-agentic-ai-from-theory-to-practice-developing-multi-agent-ai-systems-on-azure) - [Building Multi-Tenant ASP.NET Core Applications: Best Practices and Real-World Solutions](https://www.wearedevelopers.com/videos/1552-building-multi-tenant-asp-net-core-applications-best-practices-and-real-world-solutions) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Developing ASP.NET Core Microservices with Dapr: A practical guide](https://www.wearedevelopers.com/videos/1528-developing-asp-net-core-microservices-with-dapr-a-practical-guide) ## Related Articles - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)