AI Engineer (LLM & Agents)

SIX Group Services Ltd.; Madrid; Híbrido; EUR 50.000 - 75.000; Jornada completa

Descripción de la vacante

A leading financial services company is seeking a Data Scientist to join their AI team. The role focuses on developing multi-agent systems and optimizing AI applications. Candidates should have extensive experience in Python, the AI engineering stack, and designing complex APIs. This position offers a hybrid work model and supports continuous personal growth. Ideal candidates will thrive in dynamic environments and possess a strong background in AI technologies.

Servicios

Flexible work models

Personal development opportunities

Agile working methods

Formación

• 5+ years experience as a Data Scientist or 2+ as a Gen AI Application Developer.
• Core AI Engineering Stack expertise in Python and modern AI stack.
• Experience designing and integrating with complex APIs.

Responsabilidades

• Design and orchestrate complex agentic workflows using LangGraph and LangChain.
• Develop reliable tool definitions for interacting with financial APIs.
• Build Retrieval-Augmented Generation systems to ground model responses.

Conocimientos

Deep expertise in Python

Experience in LangChain

Strong knowledge of AI stack

Debugging multi-agent workflows

Experience with REST/GraphQL APIs

Familiarity with containerization (Docker)

Experience with cloud platforms (AWS/GCP/Azure)

Knowledge of vector databases

Descripción del empleo

BME - Bolsas y Mercados Españoles - drives the transformation of financial markets and belongs to SIX, the third largest exchange group in Europe.

What sets us apart drives us ahead: between local roots and global relevance, we are a unique blend of tradition and future, of foundation and growth. We value bright minds and inspire them to grow with their ideas. Come and shape the future of finance with us.

Madrid, Warsaw | Working from home up to 40% | Reference 7581

Do you want to work in a highly dynamic environment? Are you passionate about turning business problems into AI‑powered products? You have deep expertise in building AI, using the latest LLMs and AI Agents to solve complex problems in a creative way? Then our Data Science & AI team wants to hear from you! Join us in shaping the future of financial information. We are building a next-generation, AI-powered agent deeply integrated into our information terminal, redefining how users explore, analyze, and interact with complex financial data. If you are passionate about agentic AI, enjoy solving hard engineering problems, and want to see your work used daily by real users in a critical product, this is a unique opportunity to have a tangible impact from day one.

What You Will Do

• Architect Multi-Agent Systems: Design, build, and orchestrate complex agentic workflows using LangGraph and LangChain to handle sophisticated financial queries.
• Engineer Robust Tool Interfaces: Develop and maintain reliable tool definitions for interacting with complex internal APIs, ensuring the AI can accurately parse, validate, and utilize financial data.
• Implement Advanced RAG: Build and optimize Retrieval-Augmented Generation systems to ground model responses in proprietary data.
• Drive Structured Output Generation: Ensure AI responses are structured for rich UI rendering, enabling the generation of dynamic graphs, charts, and interactive elements.
• Establish Evaluation Pipelines: Create rigorous testing frameworks and metrics to evaluate agent performance, reliability, and accuracy in a production environment

What You Bring

• 5+ years of experience as Data Scientist, or 2+ as a Gen AI Application Developer.
• Core AI Engineering Stack: Deep expertise in Python and the modern AI stack, including LangChain, LangGraph, OpenAI SDK, and Hugging Face Transformers. Strong ability to debug and optimize multi-agent workflows, with a focus on asynchronous execution, state management, and concurrency.
• API & Data Proficiency: Experience designing and integrating with complex REST/GraphQL endpoints and handling structured data formats (JSON/XML) for tool calling.
• Cloud & DevOps Mindset: Hands‑on experience with containerization (Docker) and cloud platforms (AWS/GCP/Azure) for deploying production‑grade AI applications.
• Vector Search Knowledge: Familiarity with vector databases (Pinecone, Weaviate, Chroma) and embedding strategies for semantic search and RAG implementation.
• Hybrid work 3 days/week from Madrid or Warsaw.

If you have any questions, check out our FAQ page or call Yuliya Stoyko at [phone] .

For this vacancy we only acceptdirect applications.

Diversity is important to us. Therefore, we are looking to receiving applications regardless of any personal background.

What We Offer

Flexible Work Models
We trust our employees and offer a work environment that is well-balanced, productive and fosters success.

Personal Development
You will benefit from a culture of continuous learning and feedback. Your personal growth is supported through an extensive learning offering.

Agile Working Methods
Whether through scrum or design thinking, we solve exciting tasks together in teams.