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Freelance Data Science Engineer (Python & SQL)

Toloka AIRemote — València, Valencian Community, SpainNew
Remote Contract $34/hr - $34/hr

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Experience Level

Mid to Senior

Qualifications

Ideal Candidate Profile:This opportunity is well-suited for data science professionals with experience in Python, seeking part-time, non-permanent engagements. Candidates should possess:Over 5 years of hands-on data science experience, demonstrating tangible business impact. A portfolio showcasing completed projects and publications that highlight real-world problem-solving abilities. Proficiency in Python programming for data science (including Pandas, Numpy, Scipy, Scikit-learn, Statsmodels). Strong statistical analysis and machine learning expertise, with a deep understanding of algorithms, methods, and their practical applications. Advanced skills in SQL and database operations for data manipulation and analysis. Experience with Generative AI technologies (LLMs, RAG, prompt engineering, vector databases). An understanding of MLOps practices and model deployment workflows. Familiarity with contemporary frameworks such as TensorFlow, PyTorch, and LangChain. Strong written English proficiency (C1+ level).

About the job

We invite you to submit your CV in English, detailing your proficiency level in the English language.

Mindrift serves as a bridge connecting specialized talents with project-based AI opportunities in leading technology firms, focusing on the testing, evaluation, and enhancement of AI systems. Please note that this role is project-based, not a permanent position.

Key Responsibilities:

  • Develop innovative computational data science challenges that mirror real-world analytical processes across various sectors, such as telecommunications, finance, government, e-commerce, and healthcare.
  • Design tasks that necessitate Python programming for solutions, utilizing libraries such as Pandas, Numpy, Scipy, Sklearn, Statsmodels, Matplotlib, and Seaborn.
  • Ensure challenges are computationally demanding, requiring solutions that cannot be achieved manually within a reasonable time frame (days or weeks).
  • Create problems that involve intricate reasoning chains in data processing, statistical analysis, feature engineering, predictive modeling, and extraction of insights.
  • Formulate deterministic problems that yield reproducible results, minimizing stochastic elements and, when necessary, utilizing fixed random seeds for consistency.
  • Base challenges on authentic business issues, including customer analytics, risk assessment, fraud detection, forecasting, optimization, and operational effectiveness.
  • Design comprehensive problems that cover the entire data science pipeline, from data ingestion and cleaning to exploratory data analysis, modeling, validation, and deployment considerations.
  • Integrate big data processing scenarios that require scalable computational strategies.
  • Validate solutions using Python with standard data science libraries and statistical techniques.
  • Clearly document problem statements within realistic business contexts, providing verified correct answers.

About Toloka AI

Toloka AI connects skilled specialists with project-based opportunities in the AI landscape, driving innovation and progress in technology through collaborative efforts.

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