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Freelance Data Science Engineer (Python & SQL)

toloka-aiRemote — Iowa, United StatesNew
Remote Contract $90/hr - $90/hr

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Experience Level

Mid to Senior

Qualifications

This opportunity is ideal for Data Science specialists with Python expertise who are open to part-time, non-permanent projects. Preferred qualifications include:5+ years of practical 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 (including pandas, numpy, scipy, scikit-learn, statsmodels). Advanced statistical analysis and machine learning expertise, with a deep understanding of algorithms, methodologies, and their practical applications. Strong SQL skills and experience in database operations for data manipulation and analysis. Familiarity with GenAI technologies (LLMs, RAG, prompt engineering, vector databases). Understanding of MLOps practices and model deployment workflows. Knowledge of modern frameworks (TensorFlow, PyTorch, LangChain). Excellent written English proficiency (C1+).

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 skilled professionals and project-based AI opportunities with leading technology firms. Our focus is on testing, evaluating, and enhancing AI systems. Note: Participation is project-based and does not lead to permanent employment.

Opportunity Overview:

Each project presents its own unique challenges, and contributors may be responsible for:

  • Creating original computational data science problems that mirror real-world analytical workflows across diverse sectors including telecom, finance, government, e-commerce, and healthcare.
  • Developing problems that necessitate Python programming for solutions (utilizing libraries such as Pandas, Numpy, Scipy, Sklearn, Statsmodels, Matplotlib, Seaborn).
  • Ensuring that problems are computationally intensive, thus requiring several days or weeks to solve manually.
  • Designing problems that involve complex reasoning pathways in data processing, statistical analysis, feature engineering, predictive modeling, and insight extraction.
  • Formulating deterministic problems with reproducible outcomes, avoiding stochastic elements unless fixed random seeds are employed.
  • Basing problems on actual business challenges such as customer analytics, risk assessment, fraud detection, forecasting, optimization, and operational efficiency.
  • Crafting comprehensive problems that cover the entire data science pipeline (data ingestion → cleaning → exploratory data analysis → modeling → validation → deployment considerations).
  • Integrating big data processing scenarios that demand scalable computational strategies.
  • Validating solutions using Python and standard data science libraries alongside statistical methods.
  • Clearly documenting problem statements within realistic business contexts and providing verified correct answers.

Qualifications:
This opportunity is ideal for Data Science specialists with Python expertise who are open to part-time, non-permanent projects. Preferred qualifications include:

  • 5+ years of practical 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 (including pandas, numpy, scipy, scikit-learn, statsmodels).
  • Advanced statistical analysis and machine learning expertise, with a deep understanding of algorithms, methodologies, and their practical applications.
  • Strong SQL skills and experience in database operations for data manipulation and analysis.
  • Familiarity with GenAI technologies (LLMs, RAG, prompt engineering, vector databases).
  • Understanding of MLOps practices and model deployment workflows.
  • Knowledge of modern frameworks (TensorFlow, PyTorch, LangChain).
  • Excellent written English proficiency (C1+).

Process Overview:

Application → Qualification Process → Project Engagement → Task Completion → Payment.

About toloka-ai

Mindrift connects skilled professionals with project-based AI opportunities at top technology companies, focusing on the testing, evaluation, and enhancement of AI systems.

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