toloka-ai logo

Freelance Data Science Engineer (Python & SQL)

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

Clicking Apply Now takes you to AutoApply where you can tailor your resume and apply.


Experience Level

Mid to Senior

Qualifications

This role is ideally suited for data science professionals with extensive experience in Python, seeking part-time, non-permanent projects. The ideal candidate will have a minimum of 5 years of practical data science experience demonstrating significant business impact, a portfolio of completed projects and publications that highlight real-world problem-solving abilities, proficiency in Python programming for data science, advanced skills in statistical analysis and machine learning, expertise in SQL, familiarity with Generative AI technologies, knowledge of MLOps practices, experience with modern frameworks, and a strong command of written English (C1 level or above).

About the job

Please submit your CV in English and indicate your English proficiency level.

toloka-ai, in partnership with Mindrift, connects professionals to project-based freelance roles focused on testing, evaluating, and improving AI systems for leading technology companies. All roles are freelance and project-based, not permanent employment.

Role overview

This Freelance Data Science Engineer position centers on designing and validating advanced computational problems for real-world analytics. Projects span sectors such as telecom, finance, government, e-commerce, and healthcare. The work is fully remote and open to candidates based in Austria.

What you will do

  • Design computational data science problems that reflect actual business workflows across multiple industries.
  • Develop solutions in Python using libraries such as Pandas, Numpy, Scipy, Sklearn, Statsmodels, Matplotlib, and Seaborn.
  • Create complex, algorithmic problems that require computational rather than manual solutions.
  • Build data processing challenges involving statistical analysis, feature engineering, predictive modeling, and insight extraction.
  • Ensure problems are deterministic and reproducible by avoiding randomness or using fixed seeds.
  • Base challenges on real business scenarios, including customer analytics, risk assessment, fraud detection, forecasting, optimization, and operational efficiency.
  • Design problems that cover the full data science pipeline: data ingestion, cleaning, exploratory analysis, modeling, validation, and deployment considerations.
  • Include big data processing cases that require scalable computation.
  • Validate solutions in Python using standard libraries and statistical methods.
  • Document each problem with clear business context and verified answers.

Requirements

  • Minimum 5 years of hands-on data science experience with measurable business impact.
  • Portfolio of completed projects or publications demonstrating real-world problem-solving.
  • Advanced Python programming skills for data science, including pandas, numpy, scipy, scikit-learn, and statsmodels.
  • Strong background in statistical analysis and machine learning, with deep understanding of algorithms and methodologies.
  • Expertise in SQL and database operations for data manipulation and analysis.
  • Familiarity with Generative AI, such as large language models, retrieval-augmented generation, prompt engineering, and vector databases.
  • Knowledge of MLOps practices and model deployment workflows.
  • Experience with frameworks like TensorFlow, PyTorch, and LangChain.
  • Excellent written English skills at C1 level or higher.

Application process

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

About toloka-ai

At Mindrift, we bridge the gap between skilled professionals and innovative AI projects at leading technology firms. Our mission is to enhance AI systems through specialized contributions, providing experts the opportunity to engage in impactful work on a flexible basis.

Similar jobs

Browse all companies, explore by city & role, or SEO search pages.

Tailoring 0 resumes

We'll move completed jobs to Ready to Apply automatically.