Data AI & Machine Learning

Listed as a remote role based in Lisbon, Lisbon, Portugal. 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 We are seeking a driven and analytical Data Analyst to join our Data & Analytics team. In this role, you will leverage Machine Learning and AI technologies to solve real-world operational challenges, delivering actionable insights that support strategic decision-making across the organization. Role Build, deploy, and maintain forecasting models for case volume, staffing, capacity planning, and resource utilization. Design and manage LLM-powered classification pipelines to support customer satisfaction analysis, ticket routing, and escalation identification. Develop and maintain text embedding and vector search solutions for semantic search, case matching, and similarity analysis. Write and optimize Python scripts for data cleaning, transformation, analysis, and visualization. Query and analyze data within Snowflake to answer business questions and validate model performance. Create compelling visualizations and dashboards that communicate insights effectively to stakeholders. Translate complex analytical findings and machine learning outputs into clear, actionable recommendations for operations leaders and executive audiences. Collaborate closely with the Analytics Engineer to ensure high-quality, reliable, and scalable data foundations. Continuously evaluate and apply new AI and machine learning techniques to improve operational efficiency and decision-making We are looking for 3-5 years of experience in Data Analytics, Machine Learning Analytics, Applied Data Science, or a related field. Strong Python programming skills, particularly for data cleaning, transformation, analysis, and visualization. Hands-on experience developing forecasting models using Facebook Prophet or comparable time-series forecasting frameworks. Proven experience applying Large Language Models (LLMs) through APIs for classification and automation use cases. Experience with prompt engineering, output validation, performance monitoring, and cost optimization for AI-driven solutions. Familiarity with text embeddings, semantic search, and vector database technologies such as Pinecone, pgvector, Snowflake Cortex, or similar platforms. Solid SQL skills for data exploration, validation, and analysis, with Snowflake experience preferred. Strong analytical and problem-solving abilities. Excellent communication skills with the ability to explain technical concepts and model outputs to non-technical audiences. Successful completion of a background check may be required due to client contractual obligations. 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 Show more Show less Seniority level Not Applicable Employment type Full-time Job function Engineering and Information Technology Industries IT Services and IT Consulting