ShopFlow DataOps

End-to-End E-commerce Data Engineering Project

Overview

ShopFlow DataOps is an end-to-end Data Engineering portfolio project built using the Brazilian E-Commerce Public Dataset by Olist.

The project covers the complete data lifecycle:

• Data extraction and validation with Python and Pandas
• ETL loading into Microsoft SQL Server
• Transactional database design and data quality controls
• Dimensional modeling with a star schema
• SQL analytics and business KPIs
• Automated testing with pytest
• Continuous Integration using Jenkins and Docker
• Interactive business reporting with Power BI

Architecture

Olist CSV Files
      |
      v
Python + Pandas
Data Validation
      |
      v
Microsoft SQL Server
dbo.customers
dbo.products
dbo.orders
dbo.order_items
      |
      v
Data Warehouse (dw)
dim_customer
dim_product
dim_date
dim_order
fact_sales
      |
      v
Analytical SQL Views
Revenue Summary
Monthly Sales
Top Categories
Sales by State
      |
      v
Power BI Dashboard

Technologies

Technology	Purpose
Python	ETL development
Pandas	CSV processing and transformations
pyodbc	SQL Server connectivity
SQL Server	Data storage and dimensional warehouse
pytest	Automated data quality and ETL tests
Docker	Jenkins execution environment
Jenkins	Continuous Integration
Power BI	Business Intelligence reporting
GitHub	Version control and collaboration
Jira	Agile project management

Dataset

Source: Olist Brazilian E-Commerce Public Dataset.

Four primary datasets are used:

Dataset	Records
Customers	99,441
Products	32,951
Orders	99,441
Order Items	112,650

Raw CSV files are excluded from Git version control.

Data Warehouse

The warehouse uses the dw schema in SQL Server.

Dimensions

• dw.dim_customer
• dw.dim_product
• dw.dim_date
• dw.dim_order

Fact Table

• dw.fact_sales

Grain: one order item per row.

The warehouse contains 112,650 sales fact records.

Reconciliation

Source and warehouse values have been reconciled:

• Product amount: BRL 13,591,643.70
• Freight amount: BRL 2,251,909.54
• Total amount: BRL 15,843,553.24
• Reconciliation difference: BRL 0.00

These figures include all order statuses.

Business Analytics

Four analytical SQL views support Power BI:

• dw.vw_revenue_summary
• dw.vw_monthly_sales
• dw.vw_top_categories
• dw.vw_sales_by_state

Delivered orders only:

KPI	Result
Delivered orders	96,478
Delivered order items	110,197
Product revenue	BRL 13,221,498.11
Freight revenue	BRL 2,198,275.64
Total including freight	BRL 15,419,773.75

Power BI Dashboard

The ShopFlow dashboard presents:

• Product revenue in EUR
• Total revenue including freight in EUR
• Delivered order count
• Average order value
• Monthly sales evolution
• Top 10 product categories
• Sales by Brazilian state

EUR conversion uses a fixed indicative rate: 1 EUR = 5.9624 BRL.

This is a demonstration rate, not a historical transaction rate.

Automated Testing

The project includes 41 pytest tests covering:

• Data validation
• CSV extraction and transformation
• SQL loader protections using mocks
• Transaction rollback and commit scenarios

Run the test suite:

python -m pytest -v

Continuous Integration

A Jenkins pipeline runs inside Docker and performs:

1. Environment verification
2. Python virtual environment creation
3. Dependency installation
4. Automated pytest execution
5. JUnit test reporting

The Jenkins job monitors GitHub main using Poll SCM.

Repository Structure

shopflow-dataops/
|
|-- data/
|   |-- raw/               # Ignored source CSV files
|
|-- src/                   # ETL and validation scripts
|-- tests/                 # Automated pytest suite
|-- sql/
|   |-- analytics/         # Transactional analytics
|   |-- warehouse/         # Warehouse DDL and ETL
|       |-- analytics/     # Warehouse analytical views
|
|-- docker/
|   |-- jenkins/
|
|-- docs/
|   |-- images/
|
|-- powerbi/
|   |-- ShopFlow_Ecommerce_Analytics.pbix
|
|-- Jenkinsfile
|-- requirements.txt
|-- pytest.ini
|-- README.md

Project Highlights

• End-to-end pipeline from CSV to dashboard
• SQL Server transactional and dimensional modeling
• Centralized data validation
• Financial reconciliation between source and warehouse
• Automated CI testing with Docker and Jenkins
• Power BI reporting with EUR-converted business indicators
• Agile delivery with Jira tickets and GitHub Pull Requests

Author

Developed as a hands-on Data Engineering portfolio project.