I am a Data and Business Intelligence Analyst with a strong record of transforming complex data into actionable insights that drive business growth across commercial, financial, and marketing sectors.
Throughout my career, I’ve led data-driven initiatives that yielded measurable results, such as boosting e-commerce revenue by 18%, increasing ROI by 25%, and reversing financial losses into annual profits.
As a Data Analyst and BI Professional, I rely on a modern tech stack and analytical methodologies to deliver operational efficiency and strategic value.
🔧 Core Tools & Platforms
SQL (data querying & transformation)
Power BI, Tableau, Looker Studio, Google Data Studio (dashboards)
Excel (advanced modeling and automation)
Python (analytics & scripting)
Google BigQuery, Microsoft Azure, Azure Data Factory (cloud & ETL)
Figma (dashboard layout design)
📊 Key Data Analysis Techniques
ETL pipelines (data cleaning & transformation)
KPI tracking, performance metrics & sales funnel analysis
Dashboard development & data visualization best practices
Forecasting & time series analysis
Business metrics (CAC, LTV, ROI, churn, retention, conversion rate)
A/B testing, hypothesis testing, ANOVA
Data storytelling and stakeholder presentations
Integration with tools like CRMs, Ads Manager, Google Sheets
Currently, I am expanding my expertise into Data Science and AI Engineering, focusing on solving complex problems using machine learning and predictive modeling.
🧠 Programming & Libraries
Python, SQL, Git/GitHub, Streamlit
Pandas, NumPy, Matplotlib, Seaborn, Scikit-learn, Statsmodels
TensorFlow, Keras, PyTorch (in progress)
🤖 Machine Learning & AI Techniques
Supervised & unsupervised learning
Classification, regression, clustering (K-Means, DBSCAN)
Decision trees, Random Forest, XGBoost
Forecasting: ARIMA, Prophet
Evaluation: cross-validation, confusion matrix, ROC-AUC
Deep Learning: CNNs for images, RNNs/LSTMs for sequences
MLOps: Azure Machine Learning, Streamlit deployment
Statistical analysis: A/B testing, correlation, confidence intervals
I'm currently pursuing a degree in Database Technology with a focus on Data Analytics and hold certifications from Harvard, Google, Microsoft, Data Science Academy and all good courses in web.
My goal is to bridge the gap between data and decision-making with intelligence, innovation, and measurable impact.
Link for my portfolio:
https://www.datascienceportfol.io/gleidisonjunior187email:
gleidisonjunior@gmail.com
