# Machine Learning Data Engineer

**Company:** [OPSWAT](https://hotfix.jobs/companies/opswat)
**Location:** Budapest, Hungary
**Role:** Data Engineering
**Experience:** 3+ years
**Skills:** Python, SQL, Dvc, Lakefs, Airflow, Dagster, Data Versioning, Pipeline Orchestration, Dataset Versioning, Data Labeling, Data Quality, Machine Learning
**Posted:** 2026-09-02

> Own the data foundation for machine-learning systems by building dataset pipelines, labeling workflows, quality controls, and lineage processes. The role requires at least three years of data engineering experience, strong Python and SQL skills, and familiarity with ML data quality concerns and orchestration tools.

## Job Description

## Responsibilities
- Build and maintain dataset ingestion, cleaning, and versioning pipelines for training, validation, and held-out evaluation sets.
- Design and operate labeling workflows, including quality control and inter-annotator agreement tracking.
- Own dataset testing, including coverage analysis, class-balance checks, leakage detection, and dataset documentation.
- Manage dataset versioning and lineage so every model release traces back to its exact training data.
- Partner with data science and product engineering teams on data-sharing boundaries and formats.

## Requirements
- **3+ years of data engineering experience**.
- Strong **Python** and **SQL** skills.
- Experience with data versioning tools such as **DVC** or **LakeFS**, or similar tools.
- Experience with pipeline orchestration tools such as **Airflow** or **Dagster**, or similar tools.
- Understanding of machine-learning data concerns, including train/test leakage, label noise, and distribution shift.
- Rigor in documentation and reproducibility.

## Benefits
- Innovative cybersecurity environment working with cutting-edge technologies.
- Collaborative culture that values team input.
- Ongoing training and professional development opportunities.
- Mission-driven work protecting critical infrastructure and digital assets.
- Team-building activities and social events.

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