Otavio

“The learning paths on Dataquest are incredible. They give you a direction through the learning process – you don’t have to guess what to learn next.”

Otávio Silveira

Data Analyst @ Hortifruti

Course overview

Building PySpark notebooks is one thing. Building production pipelines that integrate with your company’s cloud infrastructure is another. This course teaches you to write PySpark code that runs reliably every day in real environments. You’ll start by building a complete ETL pipeline that cleans messy CSV data with inconsistent formats and quality issues. Then you’ll learn systematic performance optimization, taking a slow pipeline and making it 10x faster by reading the Spark UI and applying targeted fixes. Finally, you’ll explore the big data ecosystem—understanding managed Spark platforms like Databricks and how to integrate PySpark with cloud storage (AWS S3) and data catalogs (AWS Glue). By the end, you’ll know how to build pipelines that work at scale, diagnose performance problems, and deploy on the platforms that companies actually use.

Key skills

  • Building production-ready ETL pipelines with proper structure, error handling, and logging
  • Handling messy real-world data with inconsistent formats and quality issues
  • Deploying PySpark jobs that run reliably on production schedules
  • Reading the Spark UI to identify performance bottlenecks in job execution
  • Applying optimization techniques to make pipelines 10x faster without changing hardware
  • Understanding when to optimize and which techniques to apply for specific bottlenecks
  • Comparing managed Spark platforms and choosing the right one for different use cases
  • Connecting PySpark to cloud storage and data catalogs for complete data lake integration

Course outline

PySpark for Data Engineering [3 lessons]

Build Your First ETL Pipeline with PySpark 2h

Lesson Objectives
  • Extract data defensively from messy CSV files
  • Transform mixed-format data using PySpark DataFrame operations
  • Implement data quality checks and validation patterns
  • Structure ETL projects with separation of concerns
  • Orchestrate complete pipelines with error handling and logging

PySpark Performance Tuning and Optimization 2h

Lesson Objectives
  • Diagnose PySpark bottlenecks using Spark UI metrics
  • Eliminate redundant operations like excessive count() calls
  • Optimize partitioning with coalesce() for proper data sizing
  • Implement strategic caching for reused DataFrames efficiently
  • Apply predicate pushdown by filtering early in pipelines
  • Combine multiple aggregations into single-pass operations

Integrating PySpark with Big Data Ecosystem 2h

Lesson Objectives
  • Identify where PySpark runs in production environments
  • Compare managed Spark platforms: Databricks, EMR, Dataproc
  • Explain storage format tradeoffs: Parquet, Delta, Iceberg
  • Adapt local PySpark code for cloud deployment
  • Understand PySpark's role in modern data architecture

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Aaron

Aaron Melton

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