Chris Shumaker's Career

Recommended key solutions to incident resolution of production Spark data pipeline processing 1.5TB of data per day on AWS EMR responsible for up-to-date traffic data products and services used by millions of people

Addressed back pressure in production Flink data pipeline processing 280MB/s of data on AWS Managed Flink (KDA) that ingests billions of spatial data points for analysis and product development

Replaced Oracle SQL batch jobs with Spark SQL ETL reducing transfer time by several days

Indexed and visualized data from source systems using Elasticsearch and Kibana dashboards

Developed microservices in Spring Boot with Maven for business process management

Spearheaded installation of Docker engines and adoption of containers to streamline operations

Standardized inter-service communication and authorization with RabbitMQ and Kong

Enforced testing of code early using Jenkins and SVN for continuous integration

Streamlined application delivery using Docker Compose and Bash for continuous delivery

Assisted in development of web application user interface in Angular and Javascript on Nginx

Overhauled Python Behave and Selenium test harness for Salesforce including user login

Researched SSL and OpenAuth to integrate with Salesforce while writing automated tests

Improved accountability with behavior driven development during requirements gathering

Expanded testing abilities by training on Salesforce SOQL and user interface development 

Introduced testing best practices for high volume realistic mock data preparation and cleanup

Simplified Java ETL development in Spring Batch, reducing network overhead with chunking

Maintained Qpid-based messaging system for Positive Train Control (PTC) in C++ and Python

Managed server farm of 400 virtual machines for distributed testing with Bash, Python, Ruby

Improved relations with a major financial firm, architecting an guaranteed transaction manager

Led and trained a team of 6 developers to extend PTC systems in C++, Python, and Ruby

Systematized the complex environment setup of a distributed system with Vagrant and Puppet

Aided the PTC team as Scrummaster by facilitating effective meetings and swarming blockers

Authored automated validation tests in Cucumber and Ruby in behavior-driven development