Senior Data Scientist

About Welvaart

At Welvaart, we create technology solutions that put people at the center.
Our close leadership style and flexible culture of growth empower our teams and elevate the quality of our delivery. We combine rigor, innovation, and empathy to drive projects that transform businesses and build lasting relationships of trust.

We complement this vision with a performance‑driven Digital Marketing offering, helping companies strengthen their visibility, enhance their online presence, and accelerate growth through smart, measurable strategies.

Project

New international Tech Hub emerging from Lisbon

Role

• Ability to evaluate trade-offs and articulate sound technical choices.
• Effectively translate complex technical concepts to non-technical audiences.
• Exceptional mentoring skills to uplift mid/junior engineers and enforce standards and collaborative practices.
• Strong aptitude for breaking down ambiguous challenges into actionable, executable solutions.
• Ownership-minded approach to anticipate and resolve issues while driving long-term platform evolution.
• Advanced proficiency in data visualization and storytelling tailored for executive-level audiences.
• Skilled at establishing and mentoring teams to uphold best practices and technical excellence

We are looking for

• Advanced Python for ML/DL (NumPy, pandas, scikit-learn, PyTorch/TensorFlow).
• Strong background in statistics, experimental design, and causal inference.
• Proven ability to develop and scale complex ML/DL models for production environments.
• Proficiency in ML experimentation and tracking tools (MLflow, W&B, Databricks ML).
• Advanced SQL expertise for large-scale data manipulation and workloads.
• Deep understanding of MLOps workflows (model registry, deployment, monitoring, drift management, retraining).
• Experience leveraging big-data platforms (Spark, Databricks) to optimize model training and scoring.
• Solid knowledge of cloud-based ML platforms such as Azure ML, SageMaker, or Vertex AI

What you can discover with us?

• Be part of a tech start-up
• Different scopes of project in different sectors
• Structure of fairness and equity salary (Consultant Profile)
• Training & Certification
• Career Path management
• More than 30 Partnerships

UNLEASH THE POWER OF YOUR CAREER