Mark Fayngersh
Founder and Product Builder
Founder and product builder who turns messy operational problems into working software. Built across healthcare, compliance, and developer tooling, shipping zero-to-one across product direction, frontend, mobile, data systems, and AI workflows.
- heymarfay@icloud.com
- Website
- markfayngersh.com
- GitHub
- github.com/pheuter
- linkedin.com/in/markfayngersh
Experience
Careswitch (acquired by Paradigm)
Co-Founder; now CTO at Paradigm
2017-Present
- Built Careswitch, a modern operating system for home care agencies spanning scheduling, billing, compliance, staffing, and care documentation.
- Led product and engineering from zero to production across web, iOS, back-office workflows, and AI-powered operational tooling.
- Company was acquired by Paradigm, a home care RCM company; now serving as CTO and leading technology across the combined platform.
Narrative
AI Agents for Compliance Operations
2025
- Built AI agents for compliance, risk, and fraud teams at banks and fintechs.
Quartet Health
Behavioral Health Data Infrastructure
2015-2017
- Built a Datomic-based data platform for behavioral health with immutable storage and an EDN query API.
- Added time-travel queries, versioning, and property-based testing.
CrowdTwist
Enterprise Loyalty Software
2012-2015
- Helped rebuild a white-label loyalty platform used by major consumer brands.
- Helped drive the frontend transition from PHP to Backbone.js and then Angular.js with Webpack.
MIT Media Lab
UROP / Living Mobile Group
2011-2012
- Developed ROAR, a real-time second-screen social television platform designed to simulate the visceral, collective experience of a live stadium crowd for distributed online audiences.