Josiah Oberholtzer

Software Engineer at Cortico
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Contact Information
us****@****om
(386) 825-5501
Location
Kingston, US

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Experience

    • United States
    • IT Services and IT Consulting
    • 1 - 100 Employee
    • Software Engineer
      • Oct 2021 - Present

    • United States
    • Financial Services
    • 700 & Above Employee
    • Master Software Engineer
      • Jan 2019 - Oct 2021

      - Assisted with migration of core account and transaction processing off of legacy mainframes and into modern cloud-native implementations. - Maintained over a dozen Cassandra clusters, addressed security vulnerabilities and other enterprise compliance issues, developed in-house tooling for managing Cassandra schema migrations. - Implemented Docker-Compose- and Kubernetes-based flavors of performance- and integration-testing environments for hybrid containerized/serverless systems… Show more - Assisted with migration of core account and transaction processing off of legacy mainframes and into modern cloud-native implementations. - Maintained over a dozen Cassandra clusters, addressed security vulnerabilities and other enterprise compliance issues, developed in-house tooling for managing Cassandra schema migrations. - Implemented Docker-Compose- and Kubernetes-based flavors of performance- and integration-testing environments for hybrid containerized/serverless systems, including push-button pipelines for provisioning K8S-based environments. - On-call for service outages, incidents, and late-night systems maintenance.

    • Senior Software Engineer
      • May 2018 - Jan 2019

      - Implemented local integration testing for hybrid containerized/serverless systems using Docker-Compose, LocalStack, Serverless and Terraform. - Modernized build pipelines for speed and legibility, wrote shared pipeline libraries, and integrated Jenkins with Slack for better build status visibility. - Developed workflows for packaging and deploying Serverless applications within CapitalOne's ecosystem. - Triaged security compliance issues. - Maintained legacy hotel arbitrage… Show more - Implemented local integration testing for hybrid containerized/serverless systems using Docker-Compose, LocalStack, Serverless and Terraform. - Modernized build pipelines for speed and legibility, wrote shared pipeline libraries, and integrated Jenkins with Slack for better build status visibility. - Developed workflows for packaging and deploying Serverless applications within CapitalOne's ecosystem. - Triaged security compliance issues. - Maintained legacy hotel arbitrage monolith service, added extensive testing, and prepared for switchover to next-generation replacement. - Architected next-gen event-sourced/CQRS system for hotel arbitrage. - Implemented entity-resolution microservice for matching hotel names and addresses against Priceline's dataset. - On-call for service outages and incidents.

    • United States
    • Musicians
    • 1 - 100 Employee
    • Full Stack Developer
      • Nov 2015 - Apr 2018

      - Refactored and extended test coverage on a large legacy Python codebase. - Developed new features to support the customer buying experience. - Created and deployed containerized applications to Discogs' Kubernetes cluster. - Integrated a central authentication service across Discogs' public ecosystem - On-call for Discogs' central authentication service. - Instrumented new and existing systems and API integrations. - Refactored and extended test coverage on a large legacy Python codebase. - Developed new features to support the customer buying experience. - Created and deployed containerized applications to Discogs' Kubernetes cluster. - Integrated a central authentication service across Discogs' public ecosystem - On-call for Discogs' central authentication service. - Instrumented new and existing systems and API integrations.

    • United States
    • Higher Education
    • 700 & Above Employee
    • Research Technical Assistant
      • Jun 2013 - Jun 2014

      - Lead programmer for the Music21 Project. - Implemented API documentation system. - Refactored and parallelized musical corpus metadata population and search. - Optimized musical data structures for rapid lookups by timing information. - Lead programmer for the Music21 Project. - Implemented API documentation system. - Refactored and parallelized musical corpus metadata population and search. - Optimized musical data structures for rapid lookups by timing information.

    • United States
    • Higher Education
    • 700 & Above Employee
    • Teaching Fellow
      • Sep 2010 - May 2014

      - Taught courses related to music theory, electronic music production and sound design, computer-assisted composition, and acoustics. - Led students in installing massively-multi-channel speaker arrays. - Taught courses related to music theory, electronic music production and sound design, computer-assisted composition, and acoustics. - Led students in installing massively-multi-channel speaker arrays.

    • United States
    • Musicians
    • 1 - 100 Employee
    • Programmer
      • Nov 2006 - Aug 2008

      - Implemented automated documentation preparation workflows for product catalogs and email campaigns. - Assisted in creation of new B2C mail-order website. - Implemented automated documentation preparation workflows for product catalogs and email campaigns. - Assisted in creation of new B2C mail-order website.

Education

  • Harvard University
    Doctor of Philosophy (Ph.D.), Music
    2008 - 2015
  • Harvard University
    Master’s Degree, Music
    2008 - 2015
  • Oberlin College
    Bachelor’s Degree, Music
    2002 - 2006

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