( 03 ) Skills
THE TOOLKIT.
What I reach for, grouped by what it's for.
PROGRAMMING
- Python
- SQL (Joins, CTEs, Window Functions)
- JavaScript
- C++
DATABASES
- MySQL
- PostgreSQL
- Query Optimization
- Indexing & Partitioning
- Data Warehouse Concepts
DATA ENGINEERING
- Data Ingestion & Transformation
- Data Cleaning & Wrangling
- Data Validation
- Data Quality
- ETL Pipeline Development
DATA ANALYSIS
- Pandas
- NumPy
- Exploratory Data Analysis
- Statistical Analysis
- Matplotlib
- Seaborn
BI & REPORTING
- Power BI
- Interactive Dashboards
- Data Visualization
- KPI Reporting
- Advanced Excel (Pivot Tables, Power Query, VLOOKUP)
- Streamlit
- Data Apps
MACHINE LEARNING
- Scikit-learn
- XGBoost
- Feature Engineering
- Hyperparameter Tuning (Optuna)
- Explainable AI (SHAP, LIME)
- Model Deployment (Streamlit)
QA & TOOLING
- Test Automation (Playwright, PyTest)
- REST API Testing (Postman)
- Root Cause Analysis
- Git
- GitHub
- CI/CD (Jenkins, GitHub Actions)
- JIRA
- Agile/Scrum
- End-to-End Testing (Playwright + real Chrome)
- Docker
- Nginx / Caddy
AI & LLM TOOLING
- Google Gemini API
- NL→SQL
- Prompt Design
- AI-Assisted Development