Data Scientist

**Data Science Expert — AI Projects (Python)** **hackajob** is collaborating with a leading client in the AI sector to connect specialists with project\-based opportunities focused on testing, evaluating, and improving AI systems. Participation is project\-based, not permanent employment. **What this opportunity involves** While each project involves unique tasks, contributors may: * Design original computational data science problems simulating real\-world analytical workflows (telecom, finance, government, e\-commerce, healthcare) * Create problems requiring Python programming to solve (Pandas, NumPy, SciPy, Sklearn, Statsmodels, Matplotlib, Seaborn) * Ensure problems are computationally intensive and cannot be solved manually within reasonable timeframes * Develop problems requiring non\-trivial reasoning across data processing, statistical analysis, feature engineering, predictive modelling, and insight extraction * Create deterministic, reproducible problems using fixed random seeds * Base problems on real business challenges: fraud detection, forecasting, risk assessment, customer analytics * Design end\-to\-end problems spanning the full data science pipeline (ingestion → cleaning → EDA → modelling → validation → deployment) * Document problem statements clearly with realistic business contexts and provide verified correct answers **What we look for** * 5\+ years of hands\-on data science experience with proven business impact * Portfolio of completed projects and/or publications showcasing real\-world problem\-solving * Expert Python programming for data science (pandas, numpy, scipy, scikit\-learn, statsmodels) * Deep understanding of statistical analysis, ML algorithms, and practical applications * Expert\-level SQL and database operations * Experience with GenAI technologies (LLMs, RAG, prompt engineering, vector databases) * Understanding of MLOps practices and model deployment workflows * Knowledge of modern frameworks (TensorFlow, PyTorch, LangChain) * Strong written English (C1\+) **How it works** Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid **Time expectations:** \~10–20 hours/week during active project phases (estimate only) **Payment:** Up to $55/hour \| Fixed or individual project rates \| Incentive payments on some projects