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ON.energy is building the power infrastructure that makes the AI era possible.

As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies.

Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities.

With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future.
We are looking for a hands-on Senior Data Engineer to join a small team (2 Data Engineers + 1 Data Analyst).

You will help scale our AWS-based data infrastructure, working primarily with industrial data sources and high-volume time-series data.
Responsibilities Will Include:
- Engage directly with end users to understand how they consume data, and design solutions that serve their needs.
- Design, develop,



and maintain scalable ETL/ELT pipelines for batch and real-time processing, including high-frequency time-series ingestion.
- Evolve the Data Lakehouse—optimizing storage, performance, and data consistency.
- Manage orchestration workflows with complex dependencies and error handling.
- Implement data governance, security controls, and audit policies across the AWS ecosystem, leveraging services such as AWS Lake Formation for centralized data lake permissions and governance.
- Optimize performance and cost (Fin

Ops); identify and resolve technical bottlenecks.
- Partner with the Data Analyst to deliver production-ready, analytics-optimized datasets.
- Build monitoring, alerting, and data quality testing for platform reliability.

Requirements:
- Bachelor’s degree in Computer Science, Computer Engineering, or a closely related discipline is required.
- At a minimum, 5+ years of experience in Data Engineering, Analytics Engineering, or rel

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📌 Senior AWS Data Engineer Argentina; Chile; Mexico (Rosario)
🏢 On.Energy
📍 Argentina