Jeffrey Massung
Staff Software Engineer at Avenda Health
Champaign, Illinois, United States
Summary
👤
Senior🎓
Top SchoolJeffrey Massung is a Staff Software Engineer with 14 years of experience building high-performance, production-grade systems for biotech, pharma, and gaming industries. He has led teams and architectures at institutions like the Broad Institute and Prometheus (now Merck), architecting ETL pipelines, a BioIndex warehouse, and REST APIs that serve multi-terabyte genomic results with millisecond response times. His background spans distributed systems—contributing core reliability fixes to the Riak key/value store and Python client—to low-level game engine optimization, giving him rare depth across backend, infrastructure, and performance domains. Jeffrey combines technical leadership with hands-on implementation, having managed teams of engineers while still authoring critical refactors and test automation. Based in Champaign, IL, he focuses on empowering biologists and clinicians to discover disease associations and therapeutic targets through reproducible, provenance-aware data platforms. An understated strength is his knack for turning legacy systems into robust, testable components—evident from his work modernizing Riak internals and large-scale bioinformatics services.
14 years of coding experience
25 years of employment as a software developer
The University of Utah
Github Skills (14)
riak10
distributed-systems10
key-value-store10
erlang10
python10
concurrency10
test-automation10
testing10
eunit9
junit9
unit-testing9
fault-tolerance9
rpc8
back-end-development7
Programming languages (22)
Github contributions (5)
basho/riak_core
Sep 2011 - Dec 2011
Distributed systems infrastructure used by Riak.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:31 commits in 3 months
Contributions summary:Jeffrey primarily contributed to the core handoff management system within the Riak Core project. They refactored the handoff manager to use a list instead of a dictionary, implemented supervisor structures, and added tests. Their work included modifications to the vnode behavior and interaction with the handoff manager, including error handling and status tracking. The user's contributions demonstrate a focus on improving the reliability and management of handoffs in a distributed system.
erlanginfrastructureinfrastructure-systemskubernetesdistributed-systems
basho/riak-python-client
Sep 2011 - Feb 2012
The Riak client for Python.
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:8 commits in 4 months
Contributions summary:Jeffrey focused on improving the test suite for the Riak Python client. Their commits involve adding checks to verify secondary index support, restructuring the tests to improve organization, and fixing errors related to test execution. The changes involved modifying existing test files, specifically targeting features like secondary index querying and data storage. These modifications contribute to the reliability and robustness of the client library.
pythonriak
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