Jesse Posner
Co-Founder at Vora
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolJesse Posner is a Co-Founder and senior blockchain engineer with 11 years of experience building cryptographic key management and self-sovereign systems from San Francisco. He has led production key management, DKG and threshold Schnorr work at Coinbase, contributed adaptor signatures and FROST implementations to the secp256k1 ecosystem, and helped advance experimental features like confidential assets and MuSig2 in a widely used libsecp256k1 fork. At Block he shipped Bitkey and at Bitcoin.org was a Brink grantee supported by the Human Rights Foundation’s Bitcoin Development Fund, reflecting a focus on privacy-preserving tooling and human-rights-aligned infrastructure. A former attorney who founded a law practice, he combines legal rigor with deep applied cryptography to design auditable, operational key ceremonies and air-gapped cold storage processes. Now founding Vora, he pursues a local-first, self-sovereign vision for personal digital guardianship that blends research-grade crypto with product engineering. Notably, his open-source ECDSA adaptor signature work includes APIs for encryption, decryption, verification, and key recovery, demonstrating both protocol-level expertise and pragmatic engineering.
10 years of coding experience
10 years of employment as a software developer
Bachelor of Arts (B.A.) Liberal Arts, Bachelor of Arts (B.A.) Liberal Arts at St. John's CollegeDoctor of Law (J.D.) Law, Doctor of Law (J.D.) Law at The George Washington University Law SchoolBitcoin Blockchains Decentralized Applications, Bitcoin Blockchains Decentralized Applications at Blockchain UniversityRuby Ruby on Rails JavaScript jQuery React.js Flux SQL Git HTML CSS, Ruby Ruby on Rails JavaScript jQuery React.js Flux SQL Git HTML CSS at App Academy
Github Skills (8)
c1710
elliptic-curve10
secp256k110
bitcoin10
bitcoins10
c1110
cryptography10
sha9
Programming languages (11)
Github contributions (5)
BlockstreamResearch/secp256k1-zkp
Jan 2021 - Sep 2022
A fork of libsecp256k1 with support for advanced and experimental features such as Confidential Assets and MuSig2
Role in this project:
Back-end Developer / Cryptography Engineer
Back-end Developer / Cryptography EngineerContributions:65 reviews, 9 commits, 5 PRs in 1 year 8 months
Contributions summary:Jesse focused on implementing and expanding the ECDSA adaptor signature functionality within the secp256k1-zkp library. Their work included the initial setup of the ECDSA adaptor module, addition of discrete logarithm equality proofs, a custom nonce function, and the implementation of ECDSA adaptor signature APIs for encryption, decryption, verification, and key recovery. The contributions demonstrate a strong understanding of cryptography and its practical application within the Bitcoin and related blockchain domains.
cryptographylibsecp256k1rangeproofsbitcoin
jesseposner/LaunchPad
Apr 2016 - May 2016
Contributions:126 commits, 118 pushes, 1 branch in 19 days
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