Stephen Demjanenko
Co-Founder Chief Technology Officer at Matterhaul
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolStephen Demjanenko is a seasoned software executive and founder with 13+ years of experience delivering scalable web applications and secure infrastructure. He is currently Co-Founder and Chief Technology Officer at Matterhaul, leading technology strategy and product development. Previously, he co-founded ComplyCo and Permiso Security as CTO, overseeing architecture, production-grade deployments, and building and mentoring teams of engineers. At Cisco Meraki, he introduced React to the Dashboard, led frontend and frameworks initiatives, and mentored engineers to improve UI and tooling for network configurations. In the open-source community, he contributed to the Formsy-React library, focusing on form handling, dynamic input updates, and robust validation tests. Based in San Francisco and a Cornell physics graduate, he combines hands-on software delivery with strategic leadership—and outside of work, he's an outdoors enthusiast who enjoys long-distance cycling.
13 years of coding experience
14 years of employment as a software developer
Bachelor of Arts Physics, Bachelor of Arts Physics at Cornell University
English
Stackoverflow
21reputation
395reached
0answers
1question
Github Skills (7)
component-development10
javascript10
javascripts10
react10
validation6
backbonejs6
ruby-on-rails6
Programming languages (13)
Github contributions (5)
christianalfoni/formsy-react
Feb 2015 - Nov 2015
A form input builder and validator for React JS
Role in this project:
Front-end Developer
Front-end DeveloperContributions:8 commits, 17 PRs, 19 comments in 8 months
Contributions summary:Stephen primarily contributed to the `formsy-react` library, focusing on improvements to form handling and validation. Their work included fixing bugs related to null/undefined children, updating the form model when input values change dynamically, and addressing issues related to component unmounting. They also implemented new features to allow for checkbox inputs and rewritten validation tests. The user's contributions involved modifying component behavior and improving overall form functionality.
form-inputreactvalidationredux-formbuilder
sdemjanenko/newrelic_rpm_sample_streaming_app
Nov 2019 - May 2021
Contributions:31 commits, 21 PRs, 27 pushes in 1 year 6 months
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