Staff AI Engineer
At a glance
Senior AI Engineering role at Visium SA. Barcelona · full-time.
Pay not stated AI Engineer salary
aimlroles summary, based on the employer's posting.
What you'll do
- Guide complex machine learning projects from early concepts through architecture choices and production release
- Set technical direction, uphold sound architecture and maintainability, and coach engineers across project teams
- Contribute code to data, modeling and deployment workflows while assigning work effectively
- Turn client business problems into technical plans and deliver outcomes they can measure
- Raise standards across system design, modeling and MLOps by applying current machine learning practices
What you bring
- Six to eight years working in machine learning, data science or a related discipline
- Strong Python skills and practical knowledge of machine learning methods, deep learning and relevant frameworks
- Experience building and launching LLM applications, including RAG, prompt design and retrieval workflows
- A track record of technical leadership, project delivery and coaching engineering teams
- Fluent English and experience deploying machine learning systems on cloud platforms
Who this fits
This suits a senior, hands-on technical leader who can balance coding, architectural decisions, client conversations and team development. The position is onsite in Barcelona, Spain. Fluent English is required; French is an advantage.
From the employer
Visium combines strategy, frontier AI, and deep regulated-industry expertise to build and deploy AI-native systems that reinvent how businesses operate - unlocking the value of AI at scale.
We're not a strategy firm that ships slide decks and walks away. Not a tech consultancy that builds what won't get adopted. Not a product company chasing problems it doesn't understand. We're all three at once: strategy, deep technical and integration expertise, and product, working as one. That combination is our flywheel. Consulting keeps us close to the hardest real-world problems. Products let us solve them at scale. Every engagement sharpens our products; every deployment makes the next engagement faster, deeper, and more certain.
We're obsessed with outcomes. While 95% of enterprise AI pilots never reach production, Visium is built to be the 5% delivering productised AI that compounds in value, not point solutions that deliver marginal gains. We are AI-native, not AI-adjacent. We don't bolt AI onto broken workflows; we redesign them with AI at the core.
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.
You will:
- 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
To succeed in this role, you bring a combination of expertise, experience, and skills including:
- 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
What we offer
- 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
Check our LinkedIn and Instagram to learn more about us & don’t hesitate to contact us if you have any questions.