Christopher Jeffrey
CTO & Engineer at Purse
San Francisco, California, United States
Summary
🤩
RockstarChristopher Jeffrey is a San Francisco–based CTO and engineer with 15 years building production-grade systems, primarily in blockchain, cryptography, and terminal/CLI tooling. He leads engineering at Purse while drawing on prior roles at GoDaddy, BitPay, and Nodejitsu to ship resilient back-end services and payment protocol integrations. A prolific open-source contributor, his work touches core bitcoin stacks (bitcore, bcoin, hsd) and widely used developer tooling like pty.js, term.js, and marked, often fixing subtle crypto, parsing, and memory issues. He blends systems-level C/C++ and Node.js expertise with pragmatic product thinking—improving everything from RSA/SHA x509 handling to iterator memory leaks. Colleagues rely on him to refactor legacy codebases safely and add rigorous tests, and he frequently surfaces non-obvious edge cases in protocol and terminal implementations.
15 years of coding experience
4 years of employment as a software developer
Stackoverflow
14,432reputation
1.2mreached
51answers
0questions
dom-events
top-5%
console
top-5%
setinterval
top-1%
google-chrome
top-5%
javascript
top-1%
firefox
top-1%
Github Skills (93)
transaction10
composition10
testing10
bitcoins10
c1110
rsa10
c1710
bitcore10
audit-logging10
file-processing10
emulation10
x509certificate210
streaming10
markdown10
transactional10
Programming languages (9)
Github contributions (5)
chjj/pty.js
Feb 2012 - Jul 2016
Bindings to forkpty(3) for node.js.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:144 commits, 13 PRs, 41 pushes in 4 years 5 months
Contributions summary:Christopher primarily focused on improving the terminal arguments within the `pty.js` repository, which provides bindings to `forkpty(3)` for Node.js. These changes included modifications to the core terminal arguments and related functionalities within `lib/term.js` and `src/pty.cc`. The user also refactored the code for consistency and added a test suite to validate the project's functionality. Moreover, the user fixed build and license-related issues.
execpipereplaynode-jsjavascript
chjj/tty.js
Feb 2012 - Aug 2015
A terminal for your browser, using node/express/socket.io
Role in this project:Front-end Developer
Front-end DeveloperContributions:371 commits, 1 PR, 4 pushes in 3 years 6 months
Contributions summary:Christopher's primary contributions involve enhancing the user interface and the underlying functionality of the terminal application. They added comments, renamed functions, and extended the state machine by implementing more control sequences, including those for character attributes, cursor manipulation, and scrolling. They also added support for mouse events, providing the ability to paste content and implementing program-specific features, such as scrollback navigation.
xtermsocketbrowsernode-expresssocket-io
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