Data Engineering Nanodegree
Projects and resources developed in the DEND Nanodegree from Udacity.
Project 1: Relational Databases - Data Modeling with PostgreSQL.
Developed a relational database using PostgreSQL to model user activity data for a music streaming app. Skills include:
- Created a relational database using PostgreSQL
- Developed a Star Schema database using optimized definitions of Fact and Dimension tables. Normalization of tables.
- Built out an ETL pipeline to optimize queries in order to understand what songs users listen to.
Proficiencies include: Python, PostgreSql, Star Schema, ETL pipelines, Normalization
Project 2: NoSQL Databases - Data Modeling with Apache Cassandra.
Designed a NoSQL database using Apache Cassandra based on the original schema outlined in project one. Skills include:
- Created a nosql database using Apache Cassandra (both locally and with docker containers)
- Developed denormalized tables optimized for a specific set queries and business needs
Proficiencies used: Python, Apache Cassandra, Denormalization
Project 3: Data Warehouse - Amazon Redshift.
Created a database warehouse utilizing Amazon Redshift. Skills include:
- Creating a Redshift Cluster, IAM Roles, Security groups.
- Develop an ETL Pipeline that copies data from S3 buckets into staging tables to be processed into a star schema
- Developed a star schema with optimization to specific queries required by the data analytics team.
Proficiencies used: Python, Amazon Redshift, aws cli, Amazon SDK, SQL, PostgreSQL
Project 4: Data Lake - Spark
Scaled up the current ETL pipeline by moving the data warehouse to a data lake. Skills include:
- Create an EMR Hadoop Cluster
- Further develop the ETL Pipeline copying datasets from S3 buckets, data processing using Spark and writing to S3 buckets using efficient partitioning and parquet formatting.
- Fast-tracking the data lake buildout using (serverless) AWS Lambda and cataloging tables with AWS Glue Crawler.
Technologies used: Spark, S3, EMR, Athena, Amazon Glue, Parquet.
Project 5: Data Pipelines - Airflow
Automate the ETL pipeline and creation of data warehouse using Apache Airflow. Skills include:
- Using Airflow to automate ETL pipelines using Airflow, Python, Amazon Redshift.
- Writing custom operators to perform tasks such as staging data, filling the data warehouse, and validation through data quality checks.
- Transforming data from various sources into a star schema optimized for the analytics team's use cases.
Technologies used: Apache Airflow, S3, Amazon Redshift, Python.