Cory Johannsen
Principal Engineer at Cloudera
Portland, Oregon, United States
Summary
🤩
Rockstar🎓
Top SchoolCory Johannsen is a Principal Engineer based in Portland with over 26 years building production software across embedded firmware, enterprise web systems, and large-scale distributed workloads. He specializes in Golang-driven back-end systems, Kubernetes orchestration for ML operations, and cost-aware GPU utilization across AWS and GCP. Cory has a strong track record of shipping and supporting production services—from device bring-up and kernel work to API design and scalable cloud architectures. At Verta he contributed notable back-end and metadata work for the open-source modeldb project, improving model versioning, workspace scoping, and database hygiene. His career blends deep systems-level experience (board bring-up, device drivers, embedded Linux) with modern cloud-native ML infrastructure, making him adept at bridging hardware constraints and distributed software. He combines hands-on engineering with pragmatic product focus, hiring and leading teams to operationalize complex systems.
5 years of coding experience
25 years of employment as a software developer
Bachelor of Science Computer Science, Bachelor of Science Computer Science at University of Illinois Urbana-Champaign
Stackoverflow
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Github Skills (9)
javas10
model-management10
versioning10
java10
sql9
database-design9
machine-learning9
database-migration9
database-migrations9
Programming languages (2)
Github contributions (4)
VertaAI/modeldb
Nov 2020 - Nov 2022
Open Source ML Model Versioning, Metadata, and Experiment Management
Role in this project:
Back-end Developer
Back-end DeveloperContributions:249 reviews, 106 commits, 214 PRs in 2 years
Contributions summary:Cory primarily contributed to the back-end logic and database aspects of the `vertaai/modeldb` repository, focusing on machine learning model versioning and management. They implemented functionality to sort tags, removed logging of sensitive database credentials, and added a workspace ID to project and dataset entities, including database migrations. Furthermore, they made several improvements to project, dataset and repository entities by including workspace_id. The user also reverted a previous change involving a write lock.
data-sciencedeep-learningmachine-learningmodel-versioningmlops
VertaAI/druid
Sep 2022 - Feb 2024
Apache Druid: a high performance real-time analytics database.
Contributions:9 reviews, 33 PRs, 47 pushes in 1 year 4 months
real-time-analyticsanalyticssqlapachebig-data
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