About Us At Visium, we enable enterprise executives in defining their AI & Data strategy, execute large‑scale transformations and implement AI across operations, ensuring their organization becomes future‑proof.

We have expertise in strategy, architecture, cloud engineering, analytics, artificial intelligence and machine learning, empowering our clients to unleash and scale the power of their data.

We are on a mission to pioneer a bright future and build future‑proof and ethical organizations. Join the curious, the ambitious, the doers, the good‑hearted, the ones who build a world we’re all in awe of – our Visiumees.

Ready to become one?

Role As a Staff Machine Learning Engineer, you will own the most technically complex and high‑impact projects from conceptualization over architecture design to production deployment.

Responsibilities

Set direction for a technical team, ensuring architectural excellence and long‑term solution maintainability

Lead and mentor junior and senior engineers, raising the technical bar across projects

Stay hands‑on with high quality code contributions to data processing, modeling and deployment pipelines while delegating effectively

Partner with clients to translate complex business challenges into clear technical roadmaps and deliver measurable business outcomes

Drive adoption of modern ML best practices and state‑of‑the‑art methodology from system design and architecture over modelling to MLOps

You are not only passionate about machine learning, but also about shaping how data‑driven insights create value for our clients. You thrive in dynamic environments, balancing hands‑on technical work with strategic decision‑making and team leadership.

This role goes beyond building models: you will be responsible for technical strategy,



quality standards and growing engineering talent, shaping the future of our ML delivery practice.

Requirements

6 - 8 years of experience in machine learning, data science, or related fields

Proficiency in Python programming

Expertise in ML/DL libraries and frameworks (e.g., Scikit-learn, TensorFlow, Keras, PyTorch)

Experience with data visualization tools (e.g., Matplotlib, Seaborn, Power BI, Tableau, D3.js)

Deep learning experience (e.g., RNNs, CNNs) and strong knowledge of clustering, regression, and classification methods

Experience in designing, developing, and deploying LLM-based applications, including RAG systems, with a strong understanding of prompt engineering, vector databases, and knowledge retrieval pipelines

Familiarity with Unix/Linux environments, REST APIs, and microservices

Experience with ML deployment, production pipelines, and scalable architectures on platforms such as AzureML, AWS and GCP.

Experience with Data and AI platforms (Databricks, Dataiku, Snowflake). Certifications are a plus.

Demonstrated technical and project leadership, with the ability to guide complex initiatives and deliver results

Strong mentorship skills and experience managing or coaching teams to reach their full potential

Excellent collaboration and communication skills, capable of bridging technical and business perspectives

Fluent in English, French is a plus.

Benefits A yearly education budget to steep your learning curve A yearly sport budget because a fit body leads to a fit mind A position that enables you to have an impact on 1'000s of people An international, knowledgeable, and passionate team with a strong collaborative mindset

Opportunity to join a talented and experienced company with proven traction in its journey An open and transparent culture

📌 Staff AI Engineer (Madrid)
🏢 Visium
📍 Madrid