Keenan Barber
Software Engineer — TypeScript · Node.js · React
Holland, MI (Remote) · keenan.c.barber@gmail.com
Summary
Full-stack engineer with 7+ years building web platforms and automation tools in TypeScript and Node.js, mostly in healthcare. I'm a hands-on builder: I've migrated legacy systems to modern API-based architectures, shipped internal tools for non-technical teams, and maintained automation pipelines running across multiple hospital systems. I work fluently with modern AI development tools, integrating them into my day-to-day workflow to move faster without sacrificing code quality or test coverage. I care about writing reliable, well-tested production software and being a dependable teammate.
Experience
Senior Software Engineer
Janus Health
- Helped migrate prior-authorization workflows from a legacy monolith to a new API-based system, rebuilding supporting services including database models (Sequelize), API routing, payload validation, metric reporting, and the related test coverage.
- Built automation services and internal APIs used to process prior-authorization data across multiple hospital systems.
- Developed internal web tools that let the Customer Success team safely update records without requiring engineering support.
- Updated a production Chrome extension to meet Manifest V3 requirements and improved stability for concurrent automation runs using WebSockets.
- Supported the automation build team and developed infrastructure to monitor application health.
Software Engineer
Olive AI
- Built automation pipelines handling revenue-cycle tasks such as claim status checks and form submission across multiple healthcare systems.
- Designed and developed a reusable, productized version of the claim-status automation process used throughout the organization.
- Contributed to the architecture of a reusable data structure that standardized how internal services and external APIs exchanged data.
- Reduced vendor and resource costs by more than $1M annually by identifying unnecessary API usage and redesigning parts of the automation workflow to reduce external calls.
Front End Web Developer
Elexicon / Valorous Circle
- Built custom WordPress themes and plugins for client websites using PHP and JavaScript, focusing on performance and usability.
- Rebuilt a global enterprise website and reduced page load times by more than 50% through caching improvements and media optimization.
- Developed a content-prioritization algorithm to reduce server load during high-traffic periods.
- Managed hosting environments and ongoing support for more than 100 client sites.
Projects
The Owner's Manual
Safety Llama
- Designed and built a full-stack homeowner reference app from scratch — Node.js/TypeScript API, PostgreSQL via Prisma, React Native mobile app, Astro landing site.
- Implemented auth system with refresh token rotation, email verification, and account deletion.
- Built AI-powered asset lookups using the Anthropic API with Brave Search grounding, including source attribution, confidence scoring, and one-tap save-to-field.
- Built and distributed iOS and Android apps via Expo EAS for beta testing (App Store / Google Play release planned); deployed the API and landing site on Railway and the app frontend on Expo (EAS Hosting).
- Designed affiliate monetisation model with buy links on consumable product lookups.