Benjamin Flessner
Senior Software Engineer at Health Level Seven International
Cedar Falls, Iowa, United States
Summary
👤
Senior🎓
Top SchoolBenjamin Flessner is a senior software engineer with 11+ years focused on healthcare interoperability, having built foundational systems at Epic, led FHIR and C-CDA engineering at Redox, and currently driving data standardization and modernization at Availity. He combines deep standards expertise (co-chair of HL7's Structured Documents Work Group and co-editor of C-CDA) with hands-on implementation experience—designing a scalable FHIR data warehouse, intelligent deduplication, and robust conversion tooling between HL7v2, C-CDA, and FHIR. Benjamin is known for turning fragile legacy code into well-documented, testable architectures and for creating practical developer tooling that reduces implementation friction. Based in Cedar Falls, Iowa, he pairs systems-level thinking with a knack for clear mapping between clinical semantics and engineering realities, and he regularly authors examples and guides that prevent real-world implementation headaches.
11 years of coding experience
18 years of employment as a software developer
BS CprE, Computer Engineering, BS CprE, Computer Engineering at Iowa State University
Github Skills (34)
cda10
xml-schema10
tplink10
abaqus10
schematron9
perf9
risk-assessment9
hl7-fhir9
ccda8
simple-api8
magicmirror8
slice8
tooling8
dependency-analysis8
jira8
Programming languages (8)
Github contributions (5)
HL7/CDA-ccda-2.1
May 2021 - Jul 2022
Schematron, samples, and other artifacts for C-CDA Release 2.1
Contributions:4 releases, 6 reviews, 28 commits in 1 year 1 month
schematron
HL7/fhir-cda-validation
May 2024 - Aug 2025
Contributions:3 releases, 33 pushes, 1 branch in 1 year 3 months
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