Freelance Senior AI Platform Expert - Azure Databricks

Visium SA; Barcelona; Remote; EUR 90,000 - 150,000; Full time

Job summary

Visium SA is seeking an experienced freelancer to advise our internal platform team on designing, building and improving an AI platform on Azure Databricks. This internal role has no client-facing duties and focuses on architecture and engineering standards.

You will mentor engineers, review implementations, and help the team operate a scalable, secure platform with CI/CD/CT pipelines, Terraform, and MLOps best practices. Strong hands-on skills and leadership are essential.

Qualifications

• Extensive experience in data/ML/platform engineering or MLOps (8+ years).
• Proven Azure Databricks production experience (3+ years).
• Strong Python and PySpark programming and testing practices.
• Ability to mentor engineers and lead design reviews.

Responsibilities

• Define target architecture on Azure Databricks incl. Unity Catalog and security.
• Design CI/CD/CT pipelines; automate tests and model registry workflows.
• Review architecture decisions, code, and Terraform configurations.
• Develop reusable MLOps standards, templates and best practices.
• Support reliability, governance, security and operational excellence.
• Contribute hands-on to unblock the team and provide mentorship.
• Coaching team members and facilitating design and code reviews.

Skills

Azure Databricks

ML engineering

Data engineering

Platform engineering

MLOps

Python

PySpark

Code reviews

Mentoring engineers

Tools

GitLab

Terraform

Unity Catalog

Model registry

MLflow

Vector Search

AI Gateway

Job description

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

We are looking for an experienced freelancer to advise and support our internal platform team in designing, building and improving an AI platform on Azure Databricks. The role is internal only, with no client-facing responsibilities.

The freelancer will act as a senior technical reference for the team, helping shape the architecture, establish engineering standards, review technical implementations and support the team in building and operating a reliable, scalable and secure platform. The ideal candidate combines strong hands-on technical expertise with the ability to mentor engineers and transfer knowledge.

The freelancer will support the team across the design, implementation and continuous improvement of the platform, including:

• Defining and reviewing the target architecture on Azure Databricks, covering workspaces, environments (dev/test/prod), Unity Catalog, security, networking and integration with Azure services.
• Advising on CI/CD/CT pipelines for code, data and models, including automated testing, promotion across environments, model registry workflows and continuous training triggered by schedules, drift or new data.
• Reviewing architecture decisions, code, Terraform configurations and pipeline implementations, providing actionable recommendations and identifying areas for improvement.
• Defining reusable MLOps standards, templates and engineering best practices.
• Supporting platform reliability, scalability, governance, security and operational excellence.
• Contributing hands-on when needed to unblock the team, troubleshoot technical challenges or develop reference implementations.
• Coaching team members, facilitating design and code reviews, and transferring knowledge to help the team become increasingly autonomous.

• Extensive experience in data engineering, ML engineering, platform engineering or MLOps, ideally with at least 8 years of relevant experience.
• Strong practical experience with Azure Databricks in production environments, ideally at least 3 years.
• Solid knowledge of MLOps and the Databricks ecosystem, including MLflow, model registry, Model Serving, Feature Engineering, Databricks Workflows and monitoring.
• Experience designing and implementing CI/CD/CT pipelines, ideally using GitLab, and infrastructure-as-code practices.
• Hands-on experience with Terraform and cloud infrastructure, ideally using the Databricks and Azure providers.
• Solid knowledge of Azure services, including ADLS Gen2, Key Vault, Entra ID and cloud networking (VNet injection, private endpoints).
• Strong Python and PySpark skills, alongside software engineering best practices such as testing, packaging and code quality.
• Experience with Unity Catalog, including data governance, lineage and access control.
• Proven ability to mentor engineers, conduct design and code reviews, and establish technical standards.
• Experience with GenAI/LLMOps on Databricks, including technologies such as Vector Search, Mosaic AI Agent Framework and AI Gateway, is a strong plus.
• Experience implementing secure, private-network cloud environments and working with sensitive data is highly valued.