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Freelance Data Scientist (Python & SQL) - AI Training Specialist

MindriftRemote — Greece
Remote Contract $34/hr - $34/hr

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Experience Level

Mid to Senior

Qualifications

Qualifications:5+ years of hands-on data science experience with proven business impact; a portfolio showcasing completed projects and publications; expert proficiency in Python programming for data science; extensive knowledge of statistical analysis and machine learning; strong SQL skills for data manipulation; familiarity with Generative AI technologies; understanding of MLOps practices; knowledge of modern AI frameworks; and strong written English skills (C1+).

About the job

Please submit your CV in English and highlight your language proficiency.

Mindrift offers project-based contracts for professionals interested in shaping and testing AI systems for leading technology companies. This freelance Data Scientist (Python & SQL) - AI Training Specialist position is not a permanent role but focuses on specific projects. Work is fully remote and open to those based in Greece.

Role overview

This contract centers on designing and validating computational data science problems that reflect real-world analytics challenges. Projects span industries such as telecom, finance, government, e-commerce, and healthcare. The work involves creating complex, computationally demanding scenarios that require advanced data science skills and cannot be solved manually in a short time.

What you will do

  • Design data science problems based on realistic business cases, including customer analytics, risk assessment, fraud detection, forecasting, and optimization.
  • Develop challenges solvable using Python and libraries like Pandas, Numpy, Scipy, Scikit-learn, Statsmodels, Matplotlib, and Seaborn.
  • Ensure each problem is deterministic and reproducible, using either no randomness or fixed seeds.
  • Include tasks that require advanced reasoning: data manipulation, statistical analysis, feature engineering, predictive modeling, and drawing insights.
  • Address the full data science workflow: data ingestion, cleaning, exploratory analysis, modeling, validation, and deployment considerations.
  • Incorporate big data scenarios that demand scalable solutions.
  • Validate solutions in Python using established libraries and statistical approaches.
  • Clearly document each problem, providing realistic context and verified solutions.

Requirements

  • Minimum 5 years of hands-on data science experience with measurable business outcomes.
  • Portfolio of projects or publications showing real-world problem solving.
  • Strong Python skills for data science tasks (pandas, numpy, scipy, scikit-learn, statsmodels).
  • Advanced knowledge of statistical analysis and machine learning, both algorithms and practical applications.
  • Expertise in SQL and database operations for analytics.
  • Experience with Generative AI technologies, including LLMs, RAG, prompt engineering, and vector databases.
  • Understanding of MLOps and model deployment workflows.
  • Familiarity with frameworks such as TensorFlow, PyTorch, or LangChain.
  • Excellent English skills (C1 level or above).

Application process

  1. Apply
  2. Pass qualifications
  3. Join a project
  4. Complete tasks
  5. Receive compensation

This freelance role is remote and open to candidates based in Greece.

About Mindrift

Mindrift connects skilled professionals with project-based AI opportunities at leading tech companies, focusing on the testing, evaluation, and improvement of AI systems. We seek passionate contributors eager to tackle real-world data challenges.

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