Kallea Cohen
Associate Design Quality Engineer
United States
Summary
🤩
Rockstar🎓
Top SchoolKallea Cohen is an Associate Design Quality Engineer and mechanical engineer with 13 years of practical experience designing and testing orthopedic solutions and mechanical components. She holds a B.S. in Mechanical Engineering from Colorado State University and has driven device development from concept to prototype, including multiple provisional patent filings. At Paragon 28 she contributes to patient-specific instrumentation for orthopedic care, building on hands-on prototyping and collaboration with clinicians from her work at Mt. Rose Health Center. Her background also includes renewable-energy component design at Obermeyer Hydro, and she volunteers on an adoption committee, demonstrating strong community engagement and process-oriented teamwork. Unusually for a mechanical engineer, she has meaningful open-source software contributions to major C++ cryptocurrency projects (including bitcoin/bitcoin and zcash), focusing on modernizing code with RAII and adding robust tests—an indication of strong systems thinking and attention to quality across disciplines. Practical, multidisciplinary, and patent-minded, she blends mechanical design rigor with software-led reliability practices.
13 years of coding experience
2 years of employment as a software developer
Bachelor of Science - BS, Mechanical Engineering, Bachelor of Science - BS, Mechanical Engineering at Colorado State University
Github Skills (63)
unit-testing10
crypto-wallet10
wallet10
pytorch10
c-language10
event-handling10
python10
lightning-network10
bitcoin-wallet10
command-line-interface10
memory-management10
machine-learning10
bitcoin10
raii10
bitcoins10
Programming languages (21)
Github contributions (5)
bitcoin-core/btcdeb
Dec 2017 - Jun 2022
Bitcoin Script Debugger
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 release, 553 commits, 118 PRs in 4 years 7 months
Contributions summary:Kallea's commits primarily involve debugging and enhancing the btcdeb tool, a Bitcoin Script debugger. They made significant improvements to the interpretation of Bitcoin Script, including the addition of the OP_MERKLEBRANCHVERIFY opcode and comprehensive improvements to segwit validation support. The user also focused on improving the tool's functionality, especially in transaction signature validation, by including --pretend-valid options and other testing.
bitcoin-scripttapscripttransactiondebuggerbitcoin
bitcoin/bitcoin
Nov 2016 - Dec 2021
Bitcoin Core integration/staging tree
Role in this project:Back-end Developer
Back-end DeveloperContributions:222 reviews, 173 commits, 207 PRs in 5 years 1 month
Contributions summary:Kallea primarily focused on refactoring and improving the codebase by removing `using namespace std` from the code. They made specific changes to the `bitcoin-cli` and `bitcoin-tx` files, replacing the use of `std::` in appropriate places. These changes indicate a focus on code cleanliness and maintainability, which is a typical role of a back-end developer, especially within a C++ codebase.
cryptographyp2pc-plus-pluscryptocurrencybitcoin-core
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