Kyle Den Hartog
Staff Cryptographic Security Engineer at Brave
Auckland, Auckland, New Zealand
Summary
🤩
Rockstar🎓
Top SchoolKyle Den Hartog is a Staff Cryptographic Security Engineer with nine years of experience building privacy-first, standards-driven systems and products, currently based in Auckland. He blends applied cryptography, secure software development, and privacy-enhancing technologies to shape decentralized identity standards at W3C, IETF, and in Hyperledger projects. Kyle has shipped both front-end improvements (notably Brave Wallet UI and NFT rendering) and back-end architecture artifacts (diagrams and protocol work for indy-sdk), and his open-source contributions include QA and testing across Aries RFCs and documentation for DID extensions. As founder of a consulting practice and former senior engineer at MATTR and Evernym, he advises on cryptographic code reviews, static analysis, and secure system design. A keen standards advocate who also skis, golfs, and calls New Zealand home, he pairs rigorous technical depth with a knack for clear protocol documentation and pragmatic threat modeling.
9 years of coding experience
8 years of employment as a software developer
Associate's Degree Liberal Arts and Sciences/Liberal Studies, Associate's Degree Liberal Arts and Sciences/Liberal Studies at Kirkwood Community CollegeLiberal Arts and Sciences/Liberal Studies, Liberal Arts and Sciences/Liberal Studies at Des Moines Area Community CollegeComputer Science, Computer Science at Purdue UniversityBachelor’s Degree Computer Science, Bachelor’s Degree Computer Science at University of Iowa
English
Stackoverflow
25reputation
831reached
2answers
6questions
Github Skills (31)
unit-testing10
javascript10
pytest10
python10
distributed-ledger-technology10
distributed-ledger10
front-end-development10
react10
documentation10
test-automation10
security9
typescript9
cryptography9
typescript-types9
state-machine9
Programming languages (25)
Github contributions (5)
hyperledger-indy/indy-sdk
Apr 2018 - Jan 2019
indy-sdk
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 157 commits, 18 PRs in 9 months
Contributions summary:Kyle added and revised diagrams related to the dkms protocol and social recovery processes within the indy-sdk repository. The user's commits focus on visualizing complex interactions, particularly the steps involved in social recovery and the revocation of rogue agents, demonstrating expertise in understanding and documenting the architecture of the distributed ledger technology (DLT) and agent-based systems. The changes also include diagrams for Agent Policy Registry, illustrating Alice's agent recovery via offline or social recovery methods.
ssizkpindy-sdksdkindy
w3c/did-extensions
Dec 2020 - Jun 2022
Decentralized Identifier Ecosystem Extensions
Role in this project:Technical Writer
Technical WriterContributions:79 reviews, 9 commits, 11 PRs in 1 year 6 months
Contributions summary:Kyle's contributions primarily involved updating and improving the documentation for the `did-extensions` repository. This included adding links to specification versions, updating context URLs and deprecation notices, and correcting terminology. The commits demonstrate a focus on clarity and accuracy, ensuring the documentation reflects the latest changes and best practices within the decentralized identifier ecosystem. The user also removed a warning in the registry.
did-wgdidspec
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.