Stephen Demjanenko
Co-Founder Chief Technology Officer at Matterhaul
San Francisco, California, United States
Summary
👤
Senior🎓
Top SchoolStephen Demjanenko is a seasoned software leader and repeat founder with 14 years of experience building scalable web and compliance tooling from San Francisco. As Co-Founder and CTO at ComplyCo and now Matterhaul, he blends hands-on engineering with product strategy to turn regulatory complexity into pragmatic, production-ready systems. He has deep front-end expertise—contributing to notable open-source work on formsy-react—and a strong track record in cloud-native architectures, security, and operational delivery from startups to Cisco Meraki. Stephen scales teams and processes, having grown Permiso Security’s engineering organization from one engineer to twenty while hiring and mentoring across disciplines. Comfortable shifting between code, architecture, and stakeholder conversations, he pairs a physics degree and research background with entrepreneurial grit. An outdoor enthusiast and long-distance cyclist, he brings endurance and discipline to long projects and fast pivots alike.
14 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 (6)
component-development10
javascript10
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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