Senior AI Data Engineer - Chile (Remote, Part-time)

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Welo Data is seeking a Senior Data Engineer with world-class Python expertise and a sharp eye for data quality, engineering rigor, and visualization fidelity.

In this role, you will create realistic datasets, write intuitive prompts, and develop high-quality “golden plots” to power insightful data tasks. You\'ll bridge technical precision with real-world plausibility—crafting examples that meet strict quality rubrics and correctness criteria.

Location : Remote

Commitment : Part-time, flexible hours

This is a large-scale project with a leading global tech company, with an immediate start and a first delivery in September

Compensation : Competitive hourly rate

Overview

Welo Data is seeking a Senior Data Engineer with strong Python skills focused on data quality, engineering rigor, and visualization fidelity. The role involves creating realistic datasets, writing prompts, and reproducing target visualizations to support data tasks.

Responsibilities

• Design and build realistic toy / dummy datasets at varying complexity levels (simple, moderate, complex).
• Ensure datasets reflect real-world scenarios while remaining clean, reproducible, and well-structured (CSV format).
• Write concise, natural-language prompts (
• Ensure prompts are grammatically precise and align with project style (non-technical, not overly directive, no raw metric requests).
• Reproduce target visualizations with aesthetic and analytical fidelity.
• Write clean, reproducible Python code using libraries like pandas, matplotlib, seaborn, and plotly.
• Maintain high-quality code standards : well-commented, organized, and reproducible.
• Correctness Criteria & Documentation
• Define correctness criteria tailored to open-ended insight prompts.
• Ensure criteria are flexible, accurate, and avoid assuming fixed solutions.
• Provide supporting documentation with expected values and metrics (e.g., means, correlations, test results).
• Rigorously check each example against quality rubrics (correctness, completeness, clarity, justification).
• Maintain a high standard of accuracy across data, prompts, and visualizations.

Required Qualifications

Preferred Qualifications

Disclaimer

If you\'re a data expert who thrives on quality, clarity, and impactful engineering, we’d love to hear from you.

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