Senior Data Engineer

Defined.ai

📍 Lisbon, Lisbon, Portugal

Full-time Computer Occupations Posted February 19, 2026

Job Description

Description

Defined.ai is a leading provider of high-quality, ethically sourced data for Artificial Intelligence (AI) and Machine Learning (ML) model training. We host the world's largest AI marketplace and offer end-to-end services to help companies accelerate their AI solutions. Backed by significant funding and recognized globally for our commitment to ethical AI, we operate in a fast-paced, innovative environment with offices in Seattle and Lisbon. 

This is a hybrid or remote position.

What will you do?
  • Pipeline OrchestrationDesign and maintain end-to-end data workflows using Dagster, handling complex dependencies, retries, backfills, and observability.Build asset-based pipelines with clear ownership, lineage, and SLAs.
  • Data TransformationDevelop modular dbt models (staging, intermediate, marts) to transform raw data into clean, production-grade datasets.Apply best practices in testing, docu...