Jeff Valk
Chief Executive Officer at Admetsys
Boston, Massachusetts, United States
Summary
🤩
Rockstar🎓
Top SchoolJeff Valk is a founder-led CEO and engineer with 16 years of experience building adaptive systems that bridge hardware, software, and clinical robotics. As co-founder and Chief Technologist-turned-CEO of Admetsys, he led development of its biosensing and automation platform that couples machine intelligence with adaptive therapeutic delivery for critical care. He brings deep technical expertise across robotics, distributed systems, HCI, and machine intelligence, and is comfortable shipping both embedded hardware and production-grade software stacks. An active open-source contributor, he significantly improved stacktrace analysis and navigation in the widely used CIDER and cider-nrepl Clojure projects, helping developers diagnose JVM and Java interop issues more efficiently. Based in Boston and educated at the University of Michigan, he combines hands-on engineering with strategic leadership to translate complex clinical requirements into deployed systems. A less obvious strength is his pattern of moving between low-level technologist roles and executive strategy, enabling rapid technical pivots while maintaining product safety and reliability.
16 years of coding experience
Bachelor's Degree, Bachelor's Degree at University of Michigan
Github Skills (9)
nrepl10
clojure10
javas10
clojure-cli10
java10
emacs-lisp10
test-automation10
cider10
test-driven-design9
Programming languages (4)
Github contributions (5)
clojure-emacs/cider
Apr 2014 - Mar 2016
The Clojure Interactive Development Environment that Rocks for Emacs
Role in this project:
Back-end Developer
Back-end DeveloperContributions:53 commits, 24 pushes, 75 comments in 1 year 11 months
Contributions summary:Jeff made significant contributions to the CIDER project, focusing on improving the stacktrace functionality. They implemented features for stacktrace filtering and navigation, including the addition of new mode and keybindings. The user also refactored code, updated documentation, and integrated Java method descriptions and Javadoc browsing, enhancing the developer experience within Emacs.
rockscideremacsclojurescriptdevelopment-environment
clojure-emacs/cider-nrepl
Apr 2014 - Feb 2016
A collection of nREPL middleware to enhance Clojure editors with common functionality like definition lookup, code completion, etc.
Role in this project:Back-end Developer & Test Automation Engineer
Back-end Developer & Test Automation EngineerContributions:46 commits, 6 pushes, 1 branch in 1 year 10 months
Contributions summary:Jeff significantly enhanced the `cider-nrepl` repository by adding new middleware, specifically for stacktrace analysis and filtering. They implemented the core logic for analyzing exceptions and generating detailed stack frame information. Moreover, the user wrote comprehensive tests for the stacktrace middleware, ensuring its functionality and reliability. They also improved the existing `info` middleware and implemented test features for Java method information.
nreplcidercode-completionnrepl-middlewareenhance
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