Complete Data Engineering Roadmap for Beginners (Step-by-Step Guide for Students)
⚡ Don’t Overwhelm to Learn Data Engineering — Data Engineering is Only This Much
🔹 FOUNDATIONS
1. Programming (Core Language)
- Python (most used)
- SQL (mandatory)
- Basic scripting
- Functions & modules
- Error handling
2. SQL & Databases
- SELECT, WHERE, JOIN, GROUP BY
- Subqueries & CTE
- Window functions
- Indexes
- Query optimization
- Transactions
- ACID properties
3. Data Structures & Algorithms (Basic)
- Arrays, Lists, HashMaps
- Time complexity basics
- Sorting & searching
- Memory handling
4. Data Modeling
- ER diagrams
- Schema design
- Normalization / Denormalization
- Star schema
- Snowflake schema
- Fact & Dimension tables
5. Data Warehousing Concepts
- OLTP vs OLAP
- Data warehouse architecture
- Data marts
- ETL vs ELT
- Columnar storage
🔥 CORE DATA ENGINEERING
6. ETL / ELT Pipelines
- Extract → Transform → Load
- Batch processing
- Incremental loading
- Data transformation
- Data validation
- Scheduling pipelines
- Tools: Apache Airflow, Informatica, Talend, AWS Glue
7. Big Data Fundamentals
- What is Big Data
- Distributed systems
- Parallel processing
- CAP theorem
- Data partitioning
- Fault tolerance
8. Hadoop Ecosystem
- HDFS
- MapReduce
- Hive
- HBase
- YARN
9. Apache Spark
- Spark architecture
- RDD
- DataFrames
- Spark SQL
- PySpark
- Spark Streaming (🔥 Very important skill)
10. Data Processing Types
- Batch processing
- Stream processing
- Real-time processing
- Event-driven systems
- Tools: Kafka, Spark Streaming, Flink
11. Apache Kafka (Streaming)
- Producers & consumers
- Topics & partitions
- Message brokers
- Event streaming
- Real-time pipelines
☁️ CLOUD DATA ENGINEERING
12. Cloud Platforms
- Choose one: AWS (most popular), Azure, Google Cloud
13. Cloud Data Services
- AWS S3, Redshift, Athena, Glue, Lambda
- Azure Data Factory, Synapse, Blob Storage
- GCP BigQuery, Dataflow, Cloud Storage
14. Storage Systems
- Data lakes
- Data warehouses
- Lakehouse architecture
- Structured vs unstructured data
⚙️ PIPELINE & DEVOPS SKILLS
15. Workflow Orchestration
- Apache Airflow
- DAGs
- Scheduling jobs
- Monitoring pipelines
16. Version Control
- Git
- GitHub / GitLab
- CI/CD basics
17. Containerization
- Docker basics
- Kubernetes (optional advanced)
18. Linux & Shell Scripting
- Command line
- File permissions
- Cron jobs
- Bash scripting
📊 DATA QUALITY & GOVERNANCE
19. Data Quality
- Data validation
- Data cleaning
- Schema enforcement
- Monitoring pipelines
20. Security & Governance
- Data privacy
- Encryption
- Access control
- Compliance basics
🚀 ADVANCED CONCEPTS
21. Distributed Systems
- Scalability
- Replication
- Consistency models
22. Performance Optimization
- Query tuning
- Partitioning
- Caching
- Indexing strategies
23. Testing Data Pipelines
- Unit testing
- Data validation tests
- Pipeline monitoring
24. Data Formats
- CSV
- JSON
- Parquet
- Avro
- ORC
25. Modern Data Stack
- Snowflake
- Databricks
- dbt
- Delta Lake
- Lakehouse architecture
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