Join a project shaping the future of sustainable energy through cutting‑edge data engineering and scientific innovation. We are looking for a Data Engineer to help build scalable cloud-native data platforms for a deep‑tech Customer working on one of the most ambitious fusion energy initiatives in the world.
You will work with modern distributed data technologies, including Databricks, Apache Spark, AWS, and Azure, while solving complex engineering challenges in a research‑intensive environment.
We at Sigma Software value engineering excellence, long‑term partnerships, and continuous learning. This is an opportunity to contribute to breakthrough scientific initiatives while working with modern technologies and highly skilled general teams.
PROJECT
The project focuses on building and evolving a modern cloud‑based data platform supporting scientific research, analytics, and operational workflows in the fusion energy domain. The team develops scalable distributed data processing solutions while ensuring high standards of data quality, lineage, governance, reproducibility, and operational reliability.
You will work closely with scientists and engineers to support experimentation, analytics, and machine learning workflows in a highly innovative R&D; environment
.Job Descriptio
Design, develop, and maintain scalable and reliable data platforms and pipelines for analytics and operational use case
Build distributed data processing workflows using Apache Spark, pySpark, and Databric
Develop and evolve cloud-native data solutions leveraging Azure and AWS services




Model and optimize data structures for analytics, reporting, and downstream consumption
Integrate data from multiple heterogeneous sources while ensuring data quality, consistency, and traceability
Implement data quality controls, schema validation, lineage tracking, and monitoring processes
Optimize performance, scalability, reliability, and cost‑efficiency of data pipelines and infrastructure
Collaborate closely with scientists, analysts, and engineering teams to translate business and research requirements into technical solutions
Contribute to CI/CD processes, infrastructure automation, and engineering best practices
Research and introduce new technologies and approaches within the data engineering ecosystem
ecosystemQual
3+ years of commercial experience in Data Engineering
2+ years of hands‑on production experience with Databricks
Strong expertise with Delta Lake, including medallion architecture and table optimization
Advanced proficiency in Python, pySpark, and SQL
Deep practical knowledge of Databricks components including Unity Catalog, Lakeflow Jobs / Workflows, and job optimization
Hands‑on experience with AWS services including S3,



IAM, KMS, and at least one of AWS Batch, ECR, EventBridge, Lambda, or API Gateway
Experience designing event‑driven and asynchronous data pipelines
Strong knowledge of Infrastructure as Code and CI/CD practices
Practical experience with Terraform and Databricks Asset Bundles
Experience working with Git workflows, pull request reviews, and automated testing
Understanding of secure authentication approaches such as OIDC and service principals
Practical experience with MLflow, experiment tracking, model registry, and reproducibility practices
Strong understanding of data quality, lineage, schema contracts, and provenance concepts
Experience with data quality frameworks such as Great Expectations, Soda, pyDeequ, or Databricks DQXExperience monitoring and optimizing data platform reliability and cloud costs
Upper-Intermediate or higher English level
WILL BE A PLUS:
Experience packaging workloads using Docker and running batch workloads in AWS
Familiarity with ECR and containerized data processing solutions
Experience with experiment optimization libraries such as scikit‑optimize, BoTorch, Ax, or scipy
Understanding of ML feature engineering and leakage prevention techniques
Experience working in regulated or high‑security environments
Knowledge of data governance, compliance, and data residency requirements
Experience disabling or restricting AI‑assisted tooling/ features in secure environments
#J-18808-Ljbffr

📌 Data Engineer (Madrid)
🏢 Sigma Software
📍 Madrid