Fullstack Ai Engineer

Azienda Anonima; Siena; In loco; EUR 60.000 - 90.000; Tempo pieno

Descrizione del lavoro

Azienda Anonima in Siena, Toscana, Italy, seeks an experienced AI Engineer - Full Stack to design and build end-to-end AGI-powered products. You will create LLM pipelines, RAG solutions, and Graph RAG architectures, collaborating with frontend teams to deliver AI-enabled user experiences.

Ideal candidates have 5+ years in software engineering, strong Python/Node.js skills, and hands-on experience with LangChain, LlamaIndex, and vector databases.

Competenze

• 5+ years of Software Engineering experience with Generative AI.
• Strong experience with Python (FastAPI) and/or Node.js (Express or NestJS).
• Hands-on with LLMs, prompt engineering, and AI orchestration frameworks (LangChain, LangGraph, LlamaIndex).
• Solid understanding of RAG, embeddings, vector databases, and knowledge management.
• Experience with PostgreSQL, MongoDB, and vector DBs.
• Knowledge of frontend tech such as React or Vue.js and TypeScript.

Mansioni

• Design, develop, and maintain LLM-based Generative AI pipelines.
• Build RAG solutions with chunking, embeddings, and vector search.
• Create Graph RAG architectures using knowledge graphs for better reasoning.
• Develop AI Agents and orchestrated workflows with function calls and tools.
• Integrate OpenAI, Anthropic, Google Gemini, Llama, Mistral and optimize costs.
• Develop scalable REST APIs for frontend and third-party use.
• Work with vector databases and graph databases to support retrieval.
• Collaborate with frontend engineers for conversational UIs.
• Ensure security best practices and prompt-injection mitigation.
• Monitor AI systems with evaluation frameworks and latency optimization.
• Improve AI lifecycle from data ingest to deployment.

Conoscenze

Generative AI

Python (FastAPI)

Node.js (Express/NestJS)

LLM orchestration

AI reasoning

Rest API design

Cloud architectures

Team collaboration

Problem solving

Communication

Strumenti

LangChain

LangGraph

LlamaIndex

PostgreSQL

MongoDB

React

Descrizione del lavoro

A fast-growing Italian startup is looking for an experienced AI Engineer - Full Stack to join its team and contribute to the design and development of next-generation AI-powered products.

This role is ideal for someone who is comfortable building end-to-end Generative AI systems, from data ingestion and knowledge retrieval to production deployment, while collaborating effectively in a dynamic and fast-paced startup environment.

• Design, develop, and maintain LLM-based Generative AI pipelines, ensuring high response quality, reliability, and low latency.
• Build and optimize Retrieval-Augmented Generation (RAG) solutions, including chunking strategies, embeddings, vector search, semantic retrieval, and re-ranking.
• Design and implement Graph RAG architectures leveraging knowledge graphs and semantic relationships to improve reasoning and traceability.
• Develop AI Agents and orchestrated workflows using function calling, tool usage, and multi-step reasoning.
• Integrate leading commercial and open-source LLMs (e.g. OpenAI, Anthropic, Google Gemini, Llama, Mistral), evaluating performance, quality, and cost trade-offs.
• Design and develop scalable REST APIs and backend services exposing AI capabilities to frontend applications and third-party integrations.
• Work with vector databases (Pinecone, Weaviate, Milvus, pgvector) and graph databases (Neo4j) to support knowledge management and intelligent retrieval.
• Collaborate with frontend engineers to deliver conversational interfaces and AI-powered user experiences.
• Optimize AI applications for scalability, reliability, and cost efficiency using cloud-native architectures on AWS or GCP.
• Implement security best practices, authentication mechanisms, and prompt injection mitigation techniques.
• Monitor and evaluate AI systems using model evaluation frameworks, RAG quality metrics, and LLM evaluation methodologies.
• Troubleshoot and improve the entire AI lifecycle, from data ingestion through production deployment.
• 5+ years of experience in Software Engineering, with significant exposure to Generative AI technologies.
• Strong experience developing applications with Python (FastAPI) and/or Node.js (Express or NestJS).
• Hands-on experience with LLMs, prompt engineering, AI orchestration frameworks such as LangChain, LangGraph, or LlamaIndex, and AI Agent development.
• Solid understanding of RAG, Graph RAG, embeddings, semantic search, vector databases, and knowledge management architectures.
• Experience working with PostgreSQL, MongoDB, and vector database technologies.
• Knowledge of frontend technologies such as React or Vue.js, TypeScript, and modern web development practices.
• Experience with Docker, Kubernetes, CI/CD pipelines, and cloud platforms such as AWS or Google Cloud Platform.
• Familiarity with REST APIs, GraphQL, authentication mechanisms, and scalable distributed architectures.
• Experience monitoring AI applications, evaluating model performance, and optimizing latency, quality, and infrastructure costs.
• Strong software engineering fundamentals, including clean, maintainable code, testing, documentation, and code reviews.
• Ability to work effectively in cross-functional and international teams.
• Excellent problem-solving, communication, and stakeholder management skills.

What We're Looking For

We're looking for someone who combines strong software engineering skills with deep expertise in modern AI technologies, enjoys working in a startup environment, takes ownership of technical challenges, and is excited to build innovative AI solutions with real business impact.

This job opportunity is open to candidates of all genders, ages, and nationalities, in compliance with applicable equal opportunity and anti-discrimination legislation.

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