Ryan Zwiefelhofer
Software Engineer at Guaranteed Rate
Phoenix, Arizona, United States
Summary
🤩
Rockstar🎓
Top SchoolRyan Zwiefelhofer is a software engineer with 11 years of experience building backend systems and cloud-native deployments from Phoenix, Arizona. He has driven architecture and tooling improvements at Guaranteed Rate, working in Clojure/ClojureScript and operating Kubernetes-based services on AWS to streamline mortgage processing and reduce tech debt. Previously as a senior engineer and architect at Octo he contributed to the open-source Codice DDF project—implementing versioning, IdP single sign-off, and JSON-RPC endpoints—helping split monolith components for microservice-ready deployments. Comfortable across Java, C#, and modern cloud stacks, he blends hands-on development with developer-experience initiatives, championing internal tooling to simplify releases. Ryan’s background includes embedded systems and enterprise QA, giving him a pragmatic eye for reliability and data consistency across distributed systems. He pairs a Master’s in Computer Science with a track record of shipping production features and subtle backend improvements that improve long-term operability.
11 years of coding experience
8 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at Arizona State University
Github Skills (11)
javas10
solr10
java10
data-engineering9
data-structure9
content-management9
ddf9
data-structures9
content-management-system9
spring-boot8
database-design8
Programming languages (5)
Github contributions (5)
codice/ddf
Mar 2016 - Sep 2020
DDF Distributed Data Framework - an open source, modular integration framework.
Role in this project:
Backend Developer
Backend DeveloperContributions:16 reviews, 202 commits, 306 PRs in 4 years 7 months
Contributions summary:Ryan primarily contributed to the DDF framework's backend functionality, focusing on content and versioning features. Their work involved modifying and extending the Historian plugin to manage content versioning and updating database structures to support these changes. The user also addressed bug fixes within the catalog framework related to associations, resource retrieval, and ensured that the changes incorporated the necessary metadata and data structures, as shown by modifications to both the code and the codebase's structure.
codicecssosgisaml2framework
rzwiefel/ddf
Jun 2015 - Oct 2020
The Distributed Data Framework - Distribution, SDK, and Test
Contributions:4 PRs, 798 pushes, 334 branches in 5 years 5 months
sdkbig-datadistributed-systemsdatabasekafka
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