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Introduction to Data Engineering
Hadi Fadlallah
About Me
…
…
…
…
Just a Data Engineer!
4/6/2022 2
Plan
• What is Data Engineering?
• Data Engineer vs. Data Scientist vs. Data Analyst
• Understanding Data Management (Data Layers, DQS, MDS,
Provenance)
• Distributed Computing
• Designing Data Pipelines (Choosing Paradigm / Technologies)
• Data Engineer Jobs / Required Skills
• Helpful Tips
• Online Courses
4/6/2022 3
What is Data
Engineering?
4/6/2022 4
What is Data Engineering?
4/6/2022 5
• Data Engineering is the act of:
• Collecting data
• Transforming (…) data
• Validating data
“Making data consumable”
What is a Data Engineer?
AI/ML Engineer BI Developer Data Analyst
Database
Administrator
Report Developer Data Developer
Data Architect Data Integration
Specialist
ETL Developer
Data Scientist
4/6/2022 6
Data Engineer vs. Data Scientist
4/6/2022 7
Source: https://elu.nl/careers-in-data-science-data-analyst-vs-data-engineer-vs-data-scientist/
4/6/2022 8
4/6/2022 9
Data
Sources
Processed
Data
Storage
Data
Ingestion
Raw Data Storage
Data Processing Data
Visualization
Understanding Data Layers
4/6/2022 10
Source: https://www.sharpersoftware.com/data/dqs
4/6/2022 11
Source: https://www.dataentryoutsourced.com/blog/ever-changing-master-data-management/
Data Provenance
4/6/2022 12
Source: https://www.canto.com/blog/data-lineage/
Data Wrangling vs. Data Pre-processing
4/6/2022 13
Source: https://medium.com/swlh/data-pre-processing-data-wrangling-4a6a8624e747
Data Pre-processing Data Wrangling
What are Distributed Systems?
4/6/2022 14
15/20
• 1 Cluster = many
machines (nodes)
• Parallel computing
• Scalability
• Fault-tolerance (High
availability)
16/20
Data ingestion Data storage Data Processing
4/6/2022 17
Designing Data
Pipelines
Understanding Data &
Requirements
4/6/2022 18
Source:
https://firebrand.training/uk/lea
rn/pmp/course-material/project-
scope-management/collect-
requirements
Choosing a Paradigm
4/6/2022 19
4/6/2022 20
Source: https://www.xplenty.com/blog/etl-vs-elt/
4/6/2022 21
Source: https://www.quora.com/Why-and-when-should-I-use-NoSQL-instead-of-SQL
4/6/2022 22
Source: https://www.talend.com/resources/customer-360-data-hub/
Choosing the RIGHT
Technologies
4/6/2022 23
Relational databases
4/6/2022 24
Source: https://www.stambia.com/en/solutions/by-technology/integration-to-database/relational-database-rdbms
Data Integration
4/6/2022 25
Source: https://deevita.com/top-data-integration-tools/
NoSQL databases
4/6/2022 26
Source: https://dock.ie/data.html
4/6/2022 27
Big Data ecosystem
Source: https://sranka.wordpress.com/2014/01/29/big-data-technologies/
4/6/2022 28
Data Engineer Jobs
4/6/2022 29
Stack Overflow: https://stackoverflow.com/jobs?q=data+engineer
LinkedIn: https://www.linkedin.com/jobs/search/?geoId=92000001&keywords=data%20engineer&location=Remote
Required Skills
2. SQL, Python
3. Pandas library
4. AWS, Azure
5. Relational databases (SQL Server and MySQL)
6. Hadoop, Spark, Hive
7. NOSQL databases (MongoDB, Neo4j, and Cassandra)
…
4/6/2022 30
4/6/2022 31
1st Required Skill
4/6/2022 32
Source: https://towardsdatascience.com/most-in-demand-tech-skills-for-data-engineers-58f4c1ca25ab
4/6/2022 33
4/6/2022 34
First, make it run
correctly (in an
acceptable way). Then
start improving
performance
4/6/2022 35
Again, make sure
that you understand
well the data and
the requirements!
4/6/2022 36
DON’T use Big Data
technologies just
because you have a
huge volume of
data.
Follow best
practices
4/6/2022 37
4/6/2022 38
Online
Courses
4/6/2022 39
• Coursera:
• Google Cloud - Data Engineering, Big Data, and Machine Learning on GCP
Specialization
• San Diego - Big Data Specialization
• Udacity:
• Data Engineering nanodegree
• DataCamp:
• Data Engineer with Python Track
• IBM – CognitiveClass.ai
• Free data science and data engineering courses
• Udemy:
• Data Science A-Z™: Real-Life Data Science Exercises Included
Thank you
4/6/2022 40
https://hadifadl.github.io

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