Senior Fullstack Engineer

Clarion • New York, NY

2d • Onsite

About The Position

At Clarion, we’re rebuilding how healthcare communicates in the age of AI. Today, clinics miss 30–40% of patient calls, while staff are overwhelmed by administrative work. We believe AI agents should handle these workflows—scheduling, billing, prescription refills, and follow-ups—so healthcare teams can focus on actual patient care. We’re building the communication infrastructure modern healthcare needs. Our AI agents don’t just answer calls—they complete workflows end-to-end, ensuring patients never go unheard. To date, we’ve handled hundreds of thousands of patient interactions across virtual care companies, health systems, and a $5B health insurance company. Clarion was founded by a Stanford/Harvard-trained physician (founding team at Two Chairs and Ophelia) and an ex-Amazon Alexa engineer who led AI/ML teams at Salesforce. We’ve raised $5.4M from Accel, Y Combinator, Sequoia (Scout), and leading healthcare founders. We’re an in-person team in New York, moving fast to solve one of healthcare’s most critical problems.
Why This Role Is Special Real traction, early-stage impact: Dozens of paying customers, rapidly growing revenue, and the chance to shape core systems at an inflection point. Mission-critical problem: Healthcare communication failures affect millions daily—your work directly improves patient access and outcomes. Elite technical context: Work closely with founders who deeply understand both healthcare operations and advanced AI systems, enabling fast decisions and real ownership.

Requirements

• 5+ years of experience designing, building, and scaling production systems in high-reliability environments.
• Strong full-stack expertise with Node.js, TypeScript, React, and PostgreSQL, plus solid system design instincts.
• High ownership and agency—you thrive in ambiguity and take responsibility for outcomes.
• Proven ability to mentor engineers , lead cross-functional efforts, and communicate technical trade-offs clearly.
• You’ll be a great fit if you enjoy owning complex systems end-to-end, solving hard problems under real-world constraints, and working closely with customers and teammates to deliver mission-critical software.

Responsibilities

• Lead the deployment, performance, and reliability of AI agents operating in live, high-stakes healthcare environments.
• Architect and scale full-stack systems integrating with EHRs, legacy healthcare platforms, and real-time voice infrastructure.
• Drive technical strategy for customer-facing solutions, collaborating with product and engineering to translate client needs into scalable architecture.
• Mentor engineers and set standards for code quality, testing, security, and HIPAA-compliant development.
• Shape product roadmap by identifying systemic challenges in customer workflows and proposing high-leverage technical solutions.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed