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

toloka-aiRemote — AustriaNew
Remote Contract $58/hr - $58/hr

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Experience Level

Mid to Senior

Qualifications

Ideal candidates should have a strong background in data science, with a focus on practical application and problem-solving.

About the job

We invite you to submit your CV in English, along with your English proficiency level.

At Mindrift, we bridge the gap between specialists and project-based AI opportunities offered by leading technology companies, with a focus on evaluating, testing, and enhancing AI systems. Please note, this role is project-based and does not involve permanent employment.

Opportunity Highlights:

Each project entails distinct tasks, and contributors may:

  • Craft innovative computational data science problems that mirror real-world analytical workflows across sectors such as telecom, finance, government, e-commerce, and healthcare.
  • Develop challenges requiring Python solutions utilizing libraries like Pandas, Numpy, Scipy, Sklearn, Statsmodels, Matplotlib, and Seaborn.
  • Ensure that problems are computationally demanding and cannot be manually resolved within a reasonable timeframe (days/weeks).
  • Formulate problems that necessitate complex reasoning chains in areas like data processing, statistical analysis, feature engineering, predictive modeling, and insight extraction.
  • Produce deterministic problems with reproducible outcomes, avoiding stochastic elements unless fixed random seeds are provided for exact replication.
  • Base problems on actual business challenges, including customer analytics, risk assessment, fraud detection, forecasting, optimization, and operational efficiency.
  • Design comprehensive problems that encompass the entire data science pipeline (data ingestion → cleaning → exploratory data analysis → modeling → validation → deployment considerations).
  • Integrate big data processing scenarios that require scalable computational techniques.
  • Validate solutions utilizing Python alongside standard data science libraries and statistical approaches.
  • Clearly document problem statements within realistic business contexts and provide verified correct answers.

What We Are Looking For:
This opportunity suits Data Science specialists with expertise in Python who are open to part-time, non-permanent projects. Ideally, candidates will possess:

  • 5+ years of hands-on data science experience demonstrating tangible business impact.
  • A portfolio of completed projects and publications that showcase real-world problem-solving capabilities.
  • Proficiency in Python programming for data science (Pandas, Numpy, Scipy, Scikit-learn, Statsmodels).
  • Advanced skills in statistical analysis and machine learning, with a deep understanding of algorithms, methods, and their practical applications.
  • Expertise in SQL and database operations for data manipulation and analysis.
  • Experience with Generative AI technologies (LLMs, RAG, prompt engineering, vector databases).
  • Familiarity with MLOps practices and model deployment workflows.
  • Knowledge of modern frameworks such as TensorFlow, PyTorch, and LangChain.
  • Exceptional written English skills (C1+).

How the Process Works:

Apply → Pass qualifications → Join a project → Complete tasks → Get compensated.

About toloka-ai

Mindrift connects talented specialists with exciting project-based opportunities in the AI sector, enabling them to work with leading tech companies to improve and evaluate AI systems.

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