Sully.ai is looking for a Senior Applied AI Engineer to join our Receptionist Agent Team. You'll own the end-to-end API development and AI voice agent building and scaling, partnering with Product and Clinical teams to translate requirements into production-grade conversational AI and maintain robust EHR integrations.

What You'll Do

Design and implement TypeScript/Node.js endpoints for voice-agent interactions, authentication, scheduling workflows, and secure EHR data exchange.
Independently build, test, and deploy voice agents using platforms like Retell AI or Vapi AI—creating custom function-call APIs and dialogue flows.
Update and maintain integration layers to connect voice agents to customer EHR systems for appointment confirmation, rescheduling, and logging.
Establish logging, alerting, and metrics dashboards to ensure reliability, low latency, and high success rates in live deployments.

What We're Looking For

5+ years of software engineering experience.
3+ years in backend AI or conversational systems in production.
Proven ability to independently build voice agents on third-party platforms (Retell AI, Vapi AI, etc.).
Strong proficiency in TypeScript/Node.js.
Familiarity with RESTful/GraphQL API design, Docker, and Kubernetes for containerized deployments.
Experience integrating applications with healthcare data standards (e.g., FHIR, HL7).

Nice to Have

React experience.
Experience building and integrating API's.
Background in chatbot or voice-AI projects in production environments.
Knowledge of compliance frameworks (HIPAA, SOC-2).
Excellent communication skills for paired programming and documentation.

Technical Stack

TypeScript
Node.js
React
RESTful/GraphQL APIs
Docker
Kubernetes
FHIR
HL7
Retell AI
Vapi AI

Team & Environment

You will be part of the Receptionist Agent Team.

Benefits & Compensation

Competitive salary
Equity
Remote-first culture
Opportunity for impact in a rapidly growing company

Work Mode

This is a remote position.

Sully.ai is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to status as a protected veteran or a qualified individual with a disability, or other protected status such as race, religion, color, national origin, sex, sexual orientation, gender identity, genetic information, pregnancy or age.