AWS Data Engineer Senior

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.

About the Role
We are looking for a 100% "hands-on" Senior Data Engineer to join our team. We are seeking an experienced peer to work alongside 2 Data Engineers and 1 Data Analyst. Your role will be pivotal in elevating the technical quality of our processes and helping us scale our current AWS-based data infrastructure.
If you are a seasoned engineer who enjoys solving complex problems, building resilient systems, and working in a collaborative environment, we want to hear from you.
 
Key Responsibilities
●    Architecture & Pipelines: Design, develop, and maintain robust and scalable data flows (ETL/ELT) for both batch and real-time processing.
●    Data Lakehouse Evolution: Optimize storage and the service layer, ensuring transactional integrity, high performance, and data consistency.
●    Orchestration Strategy: Manage complex dependency logic and workflows, ensuring efficient execution and advanced error handling.
●    Governance & Security: Implement granular access controls, data security protocols, and audit policies across the entire cloud ecosystem.
●    Performance & Cost Optimization: Identify technical bottlenecks to fine-tune processes and queries, maximizing speed and cost-efficiency (FinOps).
●    Analytics Enablement: Work closely with the Data Analyst to provide optimized, production-ready datasets for business reporting and decision-making.
●    Reliability & Observability: Ensure platform health through proactive monitoring, automated alerting, and rigorous data quality testing.
 
Requirements (5 to 8 years of experience)
●    AWS Expert: Deep experience with core data services such as Glue, Athena, Step Functions, Lambda, and Kinesis.
●    Modern Table Formats: Essential hands-on experience working with Apache Iceberg.
●    Programming & Data: Expert proficiency in Python (PySpark / Python Shell) and Advanced SQL (Window Functions, CTEs, execution plan tuning).
●    Broad Ecosystem: Knowledge of various ETL/ELT tools and mastery of modeling best practices (Dimensional/Kimball).
●    Reporting: Experience preparing data architectures for visualization tools and operational/management reporting.
●    Databases: Practical experience with NoSQL engines (e.g., DynamoDB) and relational SQL databases.
●    Infrastructure as Code (IaC): Knowledge of Terraform or AWS CloudFormation.
 
Nice to Have (Plus)
●    Orchestration: Solid command of Apache Airflow (MWAA experience preferred) and native AWS orchestration.
●    Other ETL Tools: Familiarity with dbt, Airbyte, or Fivetran.
●    CI/CD: Experience automating code deployments for Glue jobs or Lambda functions.
 
Profile & Soft Skills
●    Senior Peer: Willingness to conduct code reviews and mentor colleagues in a horizontal, collaborative way.
●    Pragmatism: Ability to choose the best tool/architecture based on cost, efficiency, and project needs.
●    Ownership: A strong sense of responsibility for end-to-end data quality and system availability.
●    Collaboration: Excellent communication skills to partner with the Data Analyst and translate business needs into technical solutions.
 
What We Offer
●    Opportunity to work with modern AWS architectures.
●    Career growth toward Senior Cloud / Solutions Architect roles.
●    Training and certification support.
●    Collaborative, engineering-driven culture.
●    Competitive compensation and benefits.

For US-based roles - What you’ll get:

• Competitive salary + annual performance-based bonus eligibility
• Medical, dental, and vision insurance
• 401(k) with company match
• Paid time off and company holidays 

For Mexico-based roles - What you’ll get:

• Competitive salary + annual performance bonus eligibility
• Christmas Bonus (Aguinaldo): 30 days
• Major medical expenses and life insurance
• Paid time off and holidays (per local policy)

For all roles:

• Professional development and growth opportunities
• Opportunity to grow with a mission-driven team shaping the future of clean energy
• Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
• Accommodations: If you need an accommodation during the application process, email recruitment@onenergystorage.com
• Benefits vary by role and location and are subject to change.