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Freelance Data Science Engineer (Python & SQL)

toloka-aiRemote — Glasgow, Scotland, United KingdomNew
Remote Contract $55/hr - $55/hr

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Experience Level

Mid to Senior

Qualifications

We are looking for candidates who thrive in flexible, project-based environments, and who have a proven track record of success in data science roles. Ideal candidates will have:5+ years of hands-on experience in data science. A robust portfolio demonstrating real-world problem-solving capabilities. Exceptional skills in Python programming for data science. A deep understanding of statistical analysis and machine learning principles. Strong SQL skills for effective data manipulation. Experience with GenAI technologies. Understanding of MLOps practices. Knowledge of modern data science frameworks. Excellent written communication skills in English.

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 talented specialists and exciting project-based AI opportunities with leading technology firms, focusing on the testing, evaluation, and enhancement of AI systems. Please note that this is a project-based role, not a permanent position.

Opportunity Overview

While each project presents its own unique challenges, contributors may engage in the following tasks:

  • Design innovative computational data science challenges that replicate real-world analytical processes across various sectors such as telecom, finance, government, e-commerce, and healthcare.
  • Develop problems that necessitate Python programming for resolution, utilizing libraries such as Pandas, Numpy, Scipy, Sklearn, Statsmodels, Matplotlib, and Seaborn.
  • Ensure that the problems are computationally demanding and cannot be resolved manually within practical time limits (days or weeks).
  • Create tasks requiring complex reasoning chains in areas such as data processing, statistical analysis, feature engineering, predictive modeling, and insight extraction.
  • Design deterministic problems with consistent answers: avoid stochastic factors or necessitate fixed random seeds for exact reproducibility.
  • Base the challenges on actual business scenarios: customer analytics, risk evaluation, fraud detection, forecasting, optimization, and operational efficiencies.
  • Construct comprehensive problems that encompass the entire data science workflow (data ingestion → cleaning → exploratory data analysis → modeling → validation → deployment considerations).
  • Incorporate scenarios involving big data processing that require scalable computational methodologies.
  • Validate solutions using Python along with standard data science libraries and statistical techniques.
  • Clearly document problem statements with realistic business contexts and provide verified correct solutions.

Desired Qualifications
This role is ideal for data science experts with a background in Python who are interested in part-time, project-based work. Ideal candidates will possess:

  • 5+ years of practical data science experience with demonstrated impact on business outcomes.
  • A portfolio of completed projects and publications that showcase effective problem-solving in real-world scenarios.
  • Proficient Python programming skills for data science (pandas, numpy, scipy, scikit-learn, statsmodels).
  • A strong foundation in statistical analysis and machine learning, including a deep understanding of relevant algorithms, methods, and their applications.
  • Expertise in SQL and database operations for data manipulation and analysis.
  • Familiarity with GenAI technologies (LLMs, RAG, prompt engineering, vector databases).
  • An understanding of MLOps practices and model deployment processes.
  • Knowledge of cutting-edge frameworks (TensorFlow, PyTorch, LangChain).
  • Strong written English proficiency (C1+).

Process Overview

Apply → Complete qualifications → Join a project → Execute tasks → Receive payment

About toloka-ai

Mindrift connects skilled professionals with project-based AI opportunities, enabling contributions to the testing and enhancement of AI systems for top technology companies.

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