Daniel Ahn
Data Engineer at Reflexive Concepts- Claim this Profile
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Experience
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Reflexive Concepts
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United States
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Information Technology & Services
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1 - 100 Employee
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Data Engineer
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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
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Optiv Inc
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United States
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Big Data Consultant
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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.
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Leidos
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United States
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IT Services and IT Consulting
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700 & Above Employee
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Software Engineer
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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)
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Lockheed Martin
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United States
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Defense and Space Manufacturing
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700 & Above Employee
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Software Engineer
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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
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Johns Hopkins School of Medicine
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United States
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Hospitals and Health Care
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700 & Above Employee
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Research Assistant
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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)
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AAI Corporation
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Defense and Space Manufacturing
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400 - 500 Employee
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Software Intern
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May 2012 - Aug 2012
Baltimore, Maryland Area • Developed backend and web services for Java enterprise application (axis, JPA) • Implemented Unit Tests (jUnit)
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Education
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The Johns Hopkins University
Master of Science (M.S.), Computer Science -
The Johns Hopkins University
BS, Computer Science