Better data and better decisions

Data pipelines, machine learning, analytics, and software. I help businesses understand and use their data.

Mario Festersen

What I Work With

Data Engineering

I build pipelines that move, clean, and structure data at scale. ETL/ELT workflows, database design, and cloud infrastructure on AWS and Databricks.

Machine Learning

Time-series forecasting, NLP, and deep learning. I like building models that solve real problems and can actually run in production.

Data Analytics

Turning raw data into clear insight. Statistical analysis, visualization, and reporting that helps people make better decisions.

Full-Stack Development

Backend logic, APIs, databases, and frontend interfaces. PHP, Python, JavaScript. Whatever gets the job done in practice.

Automation

Replacing manual processes with code. Email workflows, API integrations, document generation, and scheduled jobs.

Communication

8 years as a science teacher taught me to explain complex topics clearly. I like bridging the gap between technical work and the people who use it.

Featured Projects

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Latest Posts

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