Everything you can learn here

FreeBeginner

Python Installation

FreeBeginner

Movie Catalog with Python and FastAPI

FreeIntermediate

Advanced Sql Querying

Learn to query a relational database with real SQL: JOINs in depth, aggregation, subqueries, CTEs (including recursive ones), window functions, and query optimization by reading the execution plan. You work on Reservo's database, a coworking room-booking system, and come out knowing how to answer complex business questions with a single query that's well written, readable, and efficient. It closes with a full analytical report: revenue by room and by month, top members by spend, occupancy, refund rate, and ranking.

FreeIntermediate

Python Essentials Guide

This guide teaches you Python from scratch, focused on what a backend developer actually needs: data types, control flow, functions, modules, error handling, working with files and JSON, and virtual environments. It's the foundation for the Backend Python Developer path.

FreeIntermediate

Workbook - SQL Mini-Bootcamp

FreeBeginner

Workbook - Python Mini-Bootcamp

FreeIntermediate

Data Quality And Sql Testing

Learn to measure and guarantee data quality with SQL, and to test the SQL itself. Data quality shows up in a large share of data job postings: it's about detecting incomplete, invalid, duplicate, and inconsistent data, encoding business rules as queries that return the violations, and proving your queries and migrations produce the correct result. You work on Reservo's database, populated on purpose with real dirty data, and come out knowing how to build a data quality checking system that runs and reports.