Adam Krellenstein
Chief Executive Officer at Unspendable Labs
France
Summary
👤
Senior🎓
Top SchoolAdam Krellenstein is a veteran technology founder and CEO with 11 years of experience building blockchain and finance-focused systems, currently leading Unspendable Labs from France. He co-founded Counterparty and Symbiont, where he served as Chief Scientist and CTO, blending deep protocol-level expertise with product and company-building skills. Adam’s hands-on background includes backend development on the widely used Counterparty reference implementation, contributing bug fixes, multisig support, and refactors that improve maintainability. Trained in physics and mathematics, he brings a quantitative, engineering-first approach to emergent fintech and crypto problems. Less obvious: his career spans unusual operational roles—from submarine mission engineering to managing an energy company—reflecting a taste for complex, safety-critical systems and interdisciplinary problem solving.
11 years of coding experience
7 years of employment as a software developer
Bachelor of Arts (B.A.), Physics and Mathematics, Bachelor of Arts (B.A.), Physics and Mathematics at Hampshire College
English, French, German, Spanish, Latin, Greek
Github Skills (9)
bitcoin10
bitcoins10
python10
refactor9
refactoring9
cryptography8
database-design7
apidoc7
api7
Programming languages (8)
Github contributions (5)
CounterpartyXCP/counterparty-core
Sep 2014 - Mar 2016
Counterparty Protocol Reference Implementation
Role in this project:
Back-end Developer
Back-end DeveloperContributions:8 releases, 602 reviews, 808 commits in 1 year 6 months
Contributions summary:Adam's commits primarily involve minor code cleanup and refactoring of the `bitcoin.py`, `blocks.py` and `script.py` modules in the Counterparty-core repository. The changes include refactoring of internal functions and also includes reformatting code in the `api.py` to improve readability, suggesting a focus on improving the maintainability and readability of the codebase. The user also fixed some issues in relation to multi-sig transactions. The user is likely a back-end developer focusing on improving the maintainability and the correct functionality of the codebase.
ethereumblockchaincounterpartyreference-implementation
CounterpartyXCP/counterparty-cli
Jan 2015 - Nov 2015
Counterparty Protocol Command‐Line Interface
Contributions:2 reviews, 61 commits, 16 PRs in 10 months
command-line-interfacecounterpartycli
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