Daniel Ahn

Data Engineer at Reflexive Concepts
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Location
Baltimore City County, Maryland, United States, US

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Experience

    • United States
    • Information Technology & Services
    • 1 - 100 Employee
    • Data Engineer
      • Jul 2020 - Present

      • Design, implement enterprise-grade big data pipelines using open-source and distributed-computing technologies (Apache Kafka, Apache Spark, Apache Hadoop, Apache Accumulo, Apache NiFi, Apache Airflow, ElasticSearch, Prometheus) • Productionalize Jupyterhub on K8s for enterprise users • Transform complex existing host-based JVM systems to run on Kubernetes (K8s, Docker, Helm) • Design, implement Java web applications (Spring Boot) • Implement enterprise-grade Spark analytics •… Show more • Design, implement enterprise-grade big data pipelines using open-source and distributed-computing technologies (Apache Kafka, Apache Spark, Apache Hadoop, Apache Accumulo, Apache NiFi, Apache Airflow, ElasticSearch, Prometheus) • Productionalize Jupyterhub on K8s for enterprise users • Transform complex existing host-based JVM systems to run on Kubernetes (K8s, Docker, Helm) • Design, implement Java web applications (Spring Boot) • Implement enterprise-grade Spark analytics • Create Python notebooks for data analysis (Jupyter) Show less

    • United States
    • Big Data Consultant
      • Aug 2018 - Jul 2020

      Columbia, Maryland • Designed, implemented, and operated a large-scale security data pipeline for Fortune 10 company, utilizing multiple open source technologies such as Apache Spark (Structured Streaming), Apache Kafka, Logstash, Kubernetes, Flume, and Nifi. • Designed, implemented, and operated large-scale distributed systems for big data analytics, such as ElasticSearch, Hortonworks Data Platform (Hadoop), Hortonworks Data Flow (Nifi) by using Salt.

    • United States
    • IT Services and IT Consulting
    • 700 & Above Employee
    • Software Engineer
      • Apr 2016 - Aug 2018

      Washington D.C. Metro Area • Developed a text classification system with machine learning for a client in the public sector. • Developed and maintained enterprise search solution (Solr) • Designed and implemented Hadoop data ingestion and ETL pipelines (Sqoop, MapReduce, Flume, Morphline) • Designed and developed web-based dashboard and various visualization tool (ASP .NET MVC C#, jQuery, d3, plotly, leaflet) • Design and developed graph search backend and web UI (Python, MapReduce, Solr)

    • United States
    • Defense and Space Manufacturing
    • 700 & Above Employee
    • Software Engineer
      • Jun 2014 - Mar 2016

      Baltimore, Maryland Area • Led a Product Team as a Lead Java Developer • Maintained and Delivered improvements to multiple legacy Java enterprise applications

    • United States
    • Hospitals and Health Care
    • 700 & Above Employee
    • Research Assistant
      • 2013 - 2013

      Baltimore, Maryland Area • Developed and operated a scientific computing pipeline to analyze human sequence data • Designed and improved the pipeline existing on SGE cluster (Bash, Python, and multiple Bioinformatics libraries in Unix)

    • Defense and Space Manufacturing
    • 400 - 500 Employee
    • Software Intern
      • May 2012 - Aug 2012

      Baltimore, Maryland Area • Developed backend and web services for Java enterprise application (axis, JPA) • Implemented Unit Tests (jUnit)

Education

  • The Johns Hopkins University
    Master of Science (M.S.), Computer Science
    2015 - 2018
  • The Johns Hopkins University
    BS, Computer Science
    2010 - 2014

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