Josiah Oberholtzer
Software Engineer at Cortico- Claim this Profile
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Bio
Experience
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Cortico
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United States
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IT Services and IT Consulting
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1 - 100 Employee
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Software Engineer
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Oct 2021 - Present
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Capital One
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United States
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Financial Services
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700 & Above Employee
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Master Software Engineer
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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.
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Senior Software Engineer
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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.
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Discogs
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United States
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Musicians
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1 - 100 Employee
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Full Stack Developer
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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.
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Massachusetts Institute of Technology
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United States
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Higher Education
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700 & Above Employee
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Research Technical Assistant
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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.
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Harvard University
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United States
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Higher Education
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700 & Above Employee
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Teaching Fellow
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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.
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Forced Exposure
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United States
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Musicians
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1 - 100 Employee
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Programmer
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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.
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Education
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Harvard University
Doctor of Philosophy (Ph.D.), Music -
Harvard University
Master’s Degree, Music -
Oberlin College
Bachelor’s Degree, Music