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Sr. Data Engineer

Mariana Minerals
Ann Arbor, MI

Apply Now

Job Details

Full-time
$140,000 - $200,000 a year

Qualifications

AI models
Containerization systems
Data integrity assurance
Commercial use (data warehousing systems)
Data Integration (Data management)
Data validation techniques
Schema design
SQL
Data Architecture Design (Architecture design skills)
Cloud development
Data quality monitoring
Continuous integration
Mentoring
Time Series Analysis
Model training
Machine learning (ML) fundamentals
DevOps automation
Senior level
Sensors
Python
MLOps
Database software proficiency

Full Job Description

About Mariana Minerals

Mariana Minerals is a software-first, vertically integrated minerals company on a mission to supply the critical minerals powering modern energy, AI, and defense technologies. We’re reimagining the minerals supply chain by combining deep industry expertise with advanced software, automation, and data-driven decision-making.

The Role

Mariana Minerals is building the critical minerals supply chain from the ground up—and we're looking for a Senior Data Engineer to help make it autonomous.

We're not a software company selling tools to mining operators. We are a mining company that builds software. Mariana designs, builds, commissions, and operates our own mines and refineries. We develop proprietary chemical processes and run them at lab, pilot, and commercial scale. Today, we're producing battery-grade lithium salts from real oil and gas wastewater in our facilities. Our first commercial-scale lithium production facility, Lithium One, is targeting initial production in Q1 of 2027.

As a Senior Data Engineer at Mariana, you'll own a data domain end-to-end—designing the pipelines, schemas, and contracts that make a whole class of plant data trustworthy and queryable. The systems you build are the foundation every model and every operational decision depends on.

The Tech

This is some of the most interesting applied data work happening today.

Our internal platform, PlantOS, uses the same reinforcement learning toolkits that power self-driving vehicles and humanoid robots—but applied to autonomous, short-interval control of mineral refining circuits. None of it works without data: every set point those models adjust, and every decision we make about a plant, rests on turning messy industrial reality into trustworthy, queryable, model-ready data.

The environment is noisy and non-stationary: sensors drift, lab results arrive late and malformed, wastewater compositions shift, equipment ages. The data backbone has to keep up. The end goal is fully autonomous refining operations—and the pipelines you build are the foundation everything else stands on.

What You’ll Do

Work across domains—for example, all plant sensor and historian data, or all lab and analytical results—including schema design, orchestration, reliability, and the contract it exposes to everyone downstream.
Design and evolve our fleet of pipelines that pull from messy industrial sources—sensors, lab systems, historians, imagery, and more—into our databases and warehouse.
Model time-series and analytical plant data for both human analysis and machine learning training, validation, and monitoring; own data quality, observability, and lineage in your domain.
Build the data architecture that feeds production ML—the training and monitoring layer—in partnership with the ML engineers who own the model-specific semantics.
Mentor earlier-career engineers and define the data contracts other teams build against.
Work the boundary with machine learning deliberately: you own the platform and the interface it exposes; ML engineers own the features and models built on top of it. The training and monitoring layer is shared ground you design together.

Desired Qualifications

4-8+ years in data engineering or a closely related role.
Strong Python and SQL, with deep experience designing database and warehouse schemas, including time-series and/or analytical data.
Proven experience building reliable, orchestrated data pipelines and operating them in the cloud with containers and CI/CD.
Experience with data quality, observability, and lineage, and comfort with messy real-world sources—drifting sensors, malformed exports, and the quirks of industrial systems.
A self-starter comfortable in high-ambiguity environments, working directly with process engineers, ML engineers, and operations teams.
Bonus: experience feeding data to ML systems—training datasets, feature pipelines, model monitoring—or working with industrial, sensor, or historian data.

Why This Role

We own the projects, generate the data, and close the loop. Every facility we build makes the software smarter—and the next facility faster and cheaper.

Mining is one of the last major industrial sectors that hasn't been rebuilt with modern software. The opportunity here isn't a feature gap—it's entire workflows and systems that don't exist yet.

Your work will directly shape how critical minerals are produced at scale in the coming decades.

Our culture is built on three principles:

Extreme Ownership – We take full responsibility for outcomes, relentlessly driving toward solutions.

Engineer Out Requirements, then Automate – We simplify, optimize, and then automate for scale.

Share Your Legos – We collaborate openly, share knowledge, and empower each other to build bigger, better solutions.

Join us as we build the future of responsible mineral sourcing and supply.

Compensation Range: $140K - $200K

Apply Now

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