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Digital Analytics / MediaPySpark, Spark SQL, AWS EMRApache Kafka, Spark Structured Streaming

Streaming ETL & Digital Metrics Optimization

70% Improvement
Key Performance Metric

Project Overview

Client:Global Digital Media Company
Industry:Digital Analytics / Media
Duration:2 years
Team Size:

Challenge

They needed a modular, high-performance ETL framework capable of handling batch + streaming use cases, with strong cost and performance optimizations.

Our Solution

We redesigned their digital metrics pipelines using Spark on AWS and added real-time ingestion layers with Kafka.

Modular ETL Redesign

Rebuilt legacy Impala jobs using PySpark and Spark SQL. Created reusable ETL modules with parameterized logic. Implemented schema evolution and retry handling logic

Streaming Integration

Ingested app/web logs using Apache Kafka. Processed real-time metrics via Spark Structured Streaming. Built event-based aggregation logic for instant insights

Performance Tuning

Applied optimizations: partitioning, caching, broadcast joins, and memory spill handling. Migrated to AWS EMR clusters for autoscaling. Reduced job runtime and improved overall cluster stability

Data Quality Automation

Integrated automated profiling checks using PySpark. Generated summary reports with alerting (email + Slack). Implemented Hive table validation and metadata consistency scripts

Results

90% memory reduction on Impala workloads

Achieved 90% memory reduction on Impala workloads through optimized query patterns and resource allocation.

60% improvement in pipeline runtime

Improved pipeline runtime by 60% through modular ETL design and Spark optimizations.

+45% increase in reporting freshness

Significantly improved reporting freshness through real-time data ingestion and processing.

Reusable ETL framework cut onboarding time for new datasets by half

Established a reusable ETL framework that reduced onboarding time for new datasets by 50%, enabling faster time-to-insight.

What Our Client Says

"
We went from fragile batch jobs to modular, observable pipelines. It’s the foundation of our data ecosystem now.
Data Platform Lead
Global Digital Media Company

Technologies Used

Frontend & Backend

PySpark, Spark SQL, AWS EMRApache Kafka, Spark Structured StreamingAWS S3, Hive External Tables

Infrastructure & Tools

Spark UI, Slack Alerts, Pandas ProfilingShell scripts, Cron, Migration to Airflow

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