Jaehyeon Kim
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  3. Apache Flink

Build Sport Activity Tracker with/without SQL - Apache Beam Python Examples Part 3

Build Sport Activity Tracker with/without SQL - Apache Beam Python Examples Part 3
August 1, 202420 min read Data-Streaming Apache Beam Python ExamplesApache BeamApache FlinkApache KafkaPython

A sport activity tracker in Beam Python, built first with native transforms and then with Beam SQL, showing the limits of Beam SQL in the Python SDK.

Read More: Build Sport Activity Tracker with/without SQL - Apache Beam Python Examples Part 3

Calculate Average Word Length with/without Fixed Look back - Apache Beam Python Examples Part 2

Calculate Average Word Length with/without Fixed Look back - Apache Beam Python Examples Part 2
July 18, 202415 min read Data-Streaming Apache Beam Python ExamplesApache BeamApache FlinkApache KafkaPython

Two Beam Python pipelines compute average word length from a Kafka topic, one emitting a global average and one using a sliding time window.

Read More: Calculate Average Word Length with/without Fixed Look back - Apache Beam Python Examples Part 2

Calculate K Most Frequent Words and Max Word Length - Apache Beam Python Examples Part 1

Calculate K Most Frequent Words and Max Word Length - Apache Beam Python Examples Part 1
July 4, 202423 min read Data-Streaming Apache Beam Python ExamplesApache BeamApache FlinkApache KafkaPython

Set up a local Apache Flink and Kafka environment, then build two Beam Python streaming pipelines for top K frequent words and longest word length.

Read More: Calculate K Most Frequent Words and Max Word Length - Apache Beam Python Examples Part 1

Beam Pipeline on Flink Runner - Deploy Python Stream Processing App on Kubernetes Part 2

Beam Pipeline on Flink Runner - Deploy Python Stream Processing App on Kubernetes Part 2
June 6, 202416 min read Data-Streaming Kubernetes Deploy Python Stream Processing App on KubernetesApache BeamApache FlinkApache KafkaDockerKubernetesPython

Deploy an Apache Beam Python pipeline to a Flink session cluster on minikube, packaged as a Docker image and submitted as a Kubernetes job.

Read More: Beam Pipeline on Flink Runner - Deploy Python Stream Processing App on Kubernetes Part 2

Deploy Python Stream Processing App on Kubernetes - Part 1 PyFlink Application

Deploy Python Stream Processing App on Kubernetes - Part 1 PyFlink Application
May 30, 202413 min read Data-Streaming Kubernetes Deploy Python Stream Processing App on KubernetesApache FlinkApache KafkaDockerKubernetesPython

Deploy a PyFlink application to minikube with the Flink Kubernetes Operator, alongside a Kafka cluster that provides its source and sink topics.

Read More: Deploy Python Stream Processing App on Kubernetes - Part 1 PyFlink Application

Apache Beam Local Development with Python - Part 4 Streaming Pipelines

Apache Beam Local Development with Python - Part 4 Streaming Pipelines
May 2, 202411 min read Data-Streaming Apache Beam Local Development With PythonApache BeamApache FlinkApache KafkaPython

A streaming Apache Beam pipeline in Python that aggregates page visits by user in fixed 20 second windows, written with and without Beam SQL.

Read More: Apache Beam Local Development with Python - Part 4 Streaming Pipelines

Apache Beam Local Development with Python - Part 3 Flink Runner

Apache Beam Local Development with Python - Part 3 Flink Runner
April 18, 202414 min read Data-Streaming Apache Beam Local Development With PythonApache BeamApache FlinkApache KafkaPython

The Apache Beam portability layer explained, with bash scripts that manage local Flink and Kafka clusters and a streaming pipeline on the Flink Runner.

Read More: Apache Beam Local Development with Python - Part 3 Flink Runner

Setup Local Development Environment for Apache Flink and Spark Using EMR Container Images

Setup Local Development Environment for Apache Flink and Spark Using EMR Container Images
December 7, 202317 min read Data-Engineering Data-Streaming DevelopmentAmazon EMRApache FlinkApache KafkaApache SparkAWSDocker

A local Flink and Spark environment built from EMR container images, where Flink ingests data in real time and Spark queries it via the Glue Data Catalog.

Read More: Setup Local Development Environment for Apache Flink and Spark Using EMR Container Images

Write data to DynamoDB using Kafka Connect - Real Time Streaming with Kafka and Flink Lab 5

Write data to DynamoDB using Kafka Connect - Real Time Streaming with Kafka and Flink Lab 5
November 30, 202310 min read Data-Streaming Real Time Streaming With Kafka and FlinkAmazon DynamoDBApache FlinkApache KafkaAWSKafka ConnectKpow

Ingest records from a Kafka topic into a DynamoDB table using the Camel DynamoDB sink connector, defined and run on Kafka Connect.

Read More: Write data to DynamoDB using Kafka Connect - Real Time Streaming with Kafka and Flink Lab 5

Clean, Aggregate, and Enrich Events with Flink - Real Time Streaming with Kafka and Flink Lab 4

Clean, Aggregate, and Enrich Events with Flink - Real Time Streaming with Kafka and Flink Lab 4
November 23, 202315 min read Data-Streaming Real Time Streaming With Kafka and FlinkApache FlinkApache KafkaOpenSearchPyFlinkPython

Aggregate taxi ride counts and trip durations by vendor over five second windows with PyFlink, then chart them in an OpenSearch dashboard.

Read More: Clean, Aggregate, and Enrich Events with Flink - Real Time Streaming with Kafka and Flink Lab 4
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Profile
Jaehyeon Kim
Jaehyeon Kim
Data Engineer | Data Streaming | Powering ML & AI in Real Time
Taxonomies
Data Streaming 70 Data Engineering 43 Development 28 Data Analysis 17 Open Source 13 Data Integration 12 Machine Learning 7 Kubernetes 6 Security 5 Data Architecture 3 Data Processing 3 Big Data 2 System Architecture 2 Web Development 2
Python 77 Apache Kafka 73 AWS 50 Docker 50 Apache Flink 39 Apache Beam 17 Apache Spark 17 Kafka Connect 16 Amazon MSK 14 AWS Lambda 14 Benchtop 13 dbt 13 odctl 12 Amazon EMR 11 dynamic-des 11 PostgreSQL 10 Kubernetes 8 PyFlink 8 Apache Iceberg 7 Change Data Capture (CDC) 7 Debezium 7 Kotlin 7 Apache Airflow 6 Discrete Event Simulation 6 Kafka UI 6 Amazon DynamoDB 5 PySpark 5 SimPy 5 Amazon API Gateway 4 Amazon Athena 4 AWS Glue 4 AWS Glue Schema Registry 4 BigQuery 4 Digital Twin 4 FastAPI 4 Minikube 4 Amazon EKS 3 Amazon QuickSight 3 Amazon S3 3 Apache Hudi 3 ALL 143
Kafka Development with Docker 11 Apache Beam Python Examples 10 Real Time Streaming with Kafka and Flink 7 Building Real-Time Digital Twins with dynamic-des 6 dbt Pizza Shop Demo 6 Apache Beam Local Development with Python 5 dbt for Effective Data Transformation on AWS 5 Getting Started with Real-Time Streaming in Kotlin 5 Kafka Connect for AWS Services Integration 5 Serverless Data Product 4 Data Lake Demo Using Change Data Capture 3 Getting Started with PyFlink on AWS 3 Kafka Development on Kubernetes 3 Parallel processing on single machine 3 Realtime Dashboard with FastAPI, Streamlit and Next.js 3 API development with R 2 dbt Guide for Production 2 Deploy Python Stream Processing App on Kubernetes 2 Download Stock Data 2 From Prototype to Production: Real-Time Product Recommendation with Contextual Bandits 2 ALL 25
2026 17 2025 13 2024 29 2023 39 2022 15 2021 7 2020 1 2019 5 2018 2 2017 6 2016 6 2015 15 2014 5
Posts
  • odctl 1.0: Kafka, Flink, Spark, Iceberg, Trino and MLflow on Your Laptop with One Command
    odctl 1.0: Kafka, Flink, Spark, Iceberg, Trino and MLflow on Your Laptop with One Command
    October 12, 2026
  • Defining Data-Streaming Simulations in YAML, Without Writing Python
    Defining Data-Streaming Simulations in YAML, Without Writing Python
    October 6, 2026
  • Keeping Game Leaderboards Up to Date in Real Time with Kafka and Flink SQL
    Keeping Game Leaderboards Up to Date in Real Time with Kafka and Flink SQL
    October 2, 2026
  • Change Data Capture on a Simulated Online Shop with Debezium and Kafka Connect
    Change Data Capture on a Simulated Online Shop with Debezium and Kafka Connect
    October 1, 2026
  • Building an Agentic Analytics System over an Iceberg Lakehouse
    Building an Agentic Analytics System over an Iceberg Lakehouse
    July 18, 2026
  • Current London 2026: Building End-to-End Data Lineage
    Current London 2026: Building End-to-End Data Lineage
    May 22, 2026
  • Building a Real-Time Industrial Digital Twin with Apache Flink and Online Machine Learning
    Building a Real-Time Industrial Digital Twin with Apache Flink and Online Machine Learning
    April 21, 2026
  • Productionizing an Online Product Recommender using Event Driven Architecture
    Productionizing an Online Product Recommender using Event Driven Architecture
    February 23, 2026
  • Stream Processing with Flink in Kotlin
    Stream Processing with Flink in Kotlin
    December 10, 2025
  • Guide to Building Integrated Web Applications with FastAPI and NiceGUI
    Guide to Building Integrated Web Applications with FastAPI and NiceGUI
    November 19, 2025
  • odctl 1.0: Kafka, Flink, Spark, Iceberg, Trino and MLflow on Your Laptop with One Command
    odctl 1.0: Kafka, Flink, Spark, Iceberg, Trino and MLflow on Your Laptop with One Command
    October 12, 2026
  • Defining Data-Streaming Simulations in YAML, Without Writing Python
    Defining Data-Streaming Simulations in YAML, Without Writing Python
    October 6, 2026
  • Keeping Game Leaderboards Up to Date in Real Time with Kafka and Flink SQL
    Keeping Game Leaderboards Up to Date in Real Time with Kafka and Flink SQL
    October 2, 2026
  • Change Data Capture on a Simulated Online Shop with Debezium and Kafka Connect
    Change Data Capture on a Simulated Online Shop with Debezium and Kafka Connect
    October 1, 2026
  • Data Streaming and Machine Learning Projects That Run on Your Laptop
    Data Streaming and Machine Learning Projects That Run on Your Laptop
    September 30, 2026
  • Learning MLOps with a Feature Store: A New Series
    Learning MLOps with a Feature Store: A New Series
    September 28, 2026
  • Building an Agentic Analytics System over an Iceberg Lakehouse
    Building an Agentic Analytics System over an Iceberg Lakehouse
    July 18, 2026
  • Dynamic DES: A Declarative API with Postgres and Redis Connectors
    Dynamic DES: A Declarative API with Postgres and Redis Connectors
    July 17, 2026
  • Running Kafka, Flink, Spark, Trino and Iceberg Locally with One CLI
    Running Kafka, Flink, Spark, Trino and Iceberg Locally with One CLI
    July 16, 2026
  • One Simulation, Two Pipelines: Batch Training and Live Inference with Dynamic DES
    One Simulation, Two Pipelines: Batch Training and Live Inference with Dynamic DES
    May 25, 2026
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Jaehyeon Kim

Data Engineer | Data Streaming | Powering ML & AI in Real Time

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