--- title: 'Senior Software Engineer, Agents at Ellipsis Health' canonical: 'https://feeny.ai/job/senior-software-engineer-agents-ellipsis-health-new-york-82zddq8pnmwv' type: 'job' last_seen: '2026-11-09' --- # Senior Software Engineer, Agents at Ellipsis Health - **Company:** Ellipsis Health - **Location:** New York, NY - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-11-06 - **Last confirmed live:** 2026-11-09 - **Apply:** https://jobs.ashbyhq.com/ellipsis-health/e2ce6a32-7afa-4c75-9ad4-8cd4e89f4019 ## Job description Ellipsis Health builds AI products that take on healthcare's staffing shortages and administrative burden, pairing conversational AI with our patented voice biomarker technology to help deliver better healthcare for everyone. Our voice agents talk with patients every day: booking and rescheduling appointments, answering billing questions, handling medication refills, and checking in after a hospital visit. This role sits on our provider engineering team, building the agents that health systems, provider groups, and FQHCs deploy with their patients. You'll work across the provider teams within Ellipsis, partnering with product, clinical, deployment, and commercial teams to take new agent workflows from idea to production. We're seeking a Senior Software Engineer to build the AI agents patients actually talk to. Our agents hold real conversations with real patients every day, and each one has to be accurate, safe, fast, and kind. In this role, you'll own agents end to end: conversation design, prompts, tool calling, and evals, plus the APIs and data that make an agent work in production. This is a full-stack AI role, not a research-only seat. You'll take an idea from concept to an agent in front of patients quickly, then use live conversation data to make it better. In your first three months, you'll ship multiple production agents with our health system partners, build the eval suite every agent change must pass before it ships, and measurably improve how our agents perform in production. You'll work directly with our SVP of Engineering and engineering leads, alongside product, clinical, and customer teams, on a small team where your work reaches production fast. The ideal candidate is a hands-on builder and fast learner who is comfortable with ambiguity, communicates clearly with engineers, nurses, and health system executives alike, and is motivated by making healthcare work better for patients. ## Responsibilities - Design, build, and ship AI agents end to end, including conversation flows, prompts, tool and function calling, retrieval, memory, and the backend services agents depend on. - Build evaluation systems (offline test suites, simulated conversations, human review loops, and production monitoring) so we know an agent is good before and after it ships. - Improve instruction following, tool-calling reliability, latency, and cost across our LLM and speech stack. - Help design and build our next-generation voice agent platform, choosing the right models and architecture for each task based on quality, latency, and cost. - Partner with clinical, product, and customer teams to turn workflows like scheduling, refills, billing, and post-discharge check-ins into reliable agent behavior. - Dig into real conversations and failure cases, and close the loop with prompt, tool, model, or product changes. - Build internal tools to observe, monitor, and analyze agent behavior at scale to identify common failure modes and patterns. - Track what's new in models and tooling, and bring the useful parts into production quickly. ## Qualifications - 5+ years of professional software engineering experience, including 1+ year building and shipping LLM-powered applications in production. - Strong proficiency in Python and/or TypeScript, comfortable across backend APIs and data, with enough frontend to ship a complete feature. - Hands-on experience with prompting, tool use and function calling, RAG, structured outputs, and agent orchestration. - Experience designing evals and using data to decide what to fix next. - Product sense: you care whether the patient got their appointment booked, not just whether the model metric moved. - Clear written and verbal communication with technical and non-technical teammates. ## Preferred - Voice AI or real-time speech experience, including STT, TTS, voice activity detection and turn-taking, and telephony (Twilio, SIP, WebRTC). - Fine-tuning or post-training experience with open or hosted models. - Experience in healthcare or another regulated environment, including HIPAA, EHR, and FHIR. - Experience with workflow orchestration (e.g., Temporal). - Familiarity with LLM observability and tracing tools. Salary and Benefits We offer a competitive salary and meaningful equity, along with comprehensive health, dental, and vision insurance, a 401(k) plan, and [learning budget / conferences / additional benefits]. The typical salary range for this role is $160,000 to $210,000 USD, depending on skills, qualifications, and relevant experience. ## About Ellipsis Health ## Company Overview - **One-liner**: Ellipsis Health provides an emotionally intelligent AI care manager, Sage, that automates patient engagement, clinical assessments, and care coordination for health plans, health systems, specialty care, and pharmaceutical companies. - **Entity Type**: Private (Series A-II; total funding $75.39M) - **Headquarters**: San Francisco, California, United States - **Founded**: 2017 - **Founders**: Not publicly available ## Core Business - Primary industry: Healthcare AI / Healthcare IT - Target customers: B2B – health plans, health systems, specialty care providers, and pharmaceutical companies - Mission/purpose: To deliver empathetic, autonomous virtual care management that reduces administrative burden, improves patient outcomes, and enables care teams to work at the top of their licenses. ## Products & Services - **[Sage – AI Care Manager](https://ellipsishealth.com/product/)**: An agentic AI platform that conducts fully autonomous, natural-language calls with patients. Use cases include program enrollment & engagement, clinical assessments (HRAs, HOS, HCAHPS), care coordination, medication adherence, discharge check-ins, and preventive care outreach. Sage is multilingual, HIPAA and SOC2 Type 2 compliant, and designed with clinical oversight. ## Market Standing - **Valuation**: Not disclosed - **Key Metric**: Annual revenue ~$8.1M (LinkedIn estimate) – not independently verified; total disclosed funding $75.39M (CB Insights) / $79.1M (LinkedIn) - **Notable Investors/Partners**: Khosla Ventures (lead Series A), Salesforce, Mitsui & Co. Global Investment, AME Cloud Ventures, Colliers, and 30+ other investors. Strategic partnerships with Salesforce (Sage integrated into Salesforce Health Cloud) and NVIDIA (to enhance NLP capabilities). - **Growth Signals**: Headcount grew 60% YoY to 60 employees; LinkedIn followers +80% YoY. Raised $45M Series A-II in July 2025. Filed 14 patents around psychiatric diagnosis, computational linguistics, and mood disorders. ## Competitive Advantages - **Emotionally intelligent, conversational AI** that adapts to patient tone and responses, driving higher engagement than rigid IVR systems. - **Healthcare-native security and compliance**: HIPAA, SOC2 Type 2, end-to-end encryption, and continuous third-party audits. - **Clinical oversight** built into AI operations, preserving trust and safety. - **Proprietary acoustic and NLP models** for voice-based screening and monitoring of behavioral health conditions. - **Pre-built integrations** with EHRs and Salesforce Health Cloud, reducing deployment friction. ## Strategic Focus - Deepen integration with major health IT ecosystems (Salesforce, EHRs). - Expand use cases into medication adherence and preventive care. - Scale the platform through partnerships (Clearstep, NVIDIA) to reach more health plans and systems. - Continue patenting voice-AI innovations for broader clinical applications. ## Why Work Here - Opportunity to build cutting-edge AI in a regulated, high-impact industry (healthcare). - Cross-functional team with backgrounds from top tech and healthcare companies. - Remote-friendly culture with employees across the US, Canada, India, and Brazil. - Current open roles (via [Ashby](https://jobs.ashbyhq.com/ellipsis-health)): Frontend Engineer, Backend Engineer, Senior Full-Stack Engineer, Technical Recruiter – Healthcare AI. - Engineering-led environment with strong emphasis on AI safety, ethical AI, and clinical rigor. ## Sources 1. [ellipsishealth.com](https://ellipsishealth.com/) 2. [cbinsights.com](https://www.cbinsights.com/company/ellipsis-health) 3. [linkedin.com](https://www.linkedin.com/company/ellipsis-health) 4. [ellipsishealth.com/product](https://ellipsishealth.com/product/) 5. [ellipsishealth.com/careers](https://ellipsishealth.com/careers/) ## Other roles at Ellipsis Health - [Business Operations Associate](https://feeny.ai/job/business-operations-associate-ellipsis-health-new-york-s6k20rdtwa3b) — New York, NY - [Senior Product Manager](https://feeny.ai/job/senior-product-manager-ellipsis-health-new-york-qaxa56pvjxns) — New York, NY - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-ellipsis-health-new-york-cvjpaezspjw4) — New York, NY - [Senior ML Engineer, Agentic AI](https://feeny.ai/job/senior-ml-engineer-agentic-ai-ellipsis-health-san-francisco-r9xrg4sk76m3) — San Francisco, CA - [Recruiting Coordinator](https://feeny.ai/job/recruiting-coordinator-ellipsis-health-san-francisco-sn7c7xqqqkx6) — San Francisco, CA - [Senior Backend Engineer, Core Services](https://feeny.ai/job/senior-backend-engineer-core-services-ellipsis-health-san-francisco-s29qrpgwbm29) — San Francisco, CA - [Senior Data Scientist](https://feeny.ai/job/senior-data-scientist-ellipsis-health-san-francisco-nvrrg0sesgcw) — San Francisco, CA - [Product Manager, Analytics & Reporting](https://feeny.ai/job/product-manager-analytics-reporting-ellipsis-health-san-francisco-v6m6tvdz8wvw) — San Francisco, CA - [VP Provider Sales](https://feeny.ai/job/vp-provider-sales-ellipsis-health-san-francisco-vf5z5zaxjgnz) — San Francisco, CA - [VP Payer Sales](https://feeny.ai/job/vp-payer-sales-ellipsis-health-san-francisco-azsrb3xdz1ac) — San Francisco, CA