Senior Software Engineer, Voice AI

About Us
👏 Team from OpenAI, DeepMind, NASA, GoogleX, Tesla, and 2 physicians: 6 exits, 2 IPOs.
🔥 Our model outperforms Claude, Gemini, and GPT-4.5 on clinical benchmarks.
📈 400+ healthcare orgs signed in 16 months.
⚡️ $25M raised from YC, Amity Ventures, Sequoia scouts, and more.
🌎 $1T+ market opportunity. We’re going after all of it.

About the Role
We are seeking a Senior Software Engineer to accelerate the development of Sully.ai’s Receptionist Agent. This role will focus on boosting auto-scheduling reliability, improving conversational flow, and ensuring seamless EHR sync across SMS and other channels. You’ll collaborate closely with product, design, and clinical experts to build features that remove friction for patients and providers while upholding the highest standards of engineering quality.

Key Responsibilities

• Build and optimize scheduling algorithms to improve reliability and reduce booking errors.
• Enhance conversational flows to deliver natural, empathetic, and efficient patient interactions.
• Integrate SMS and EHR systems to ensure real-time, bidirectional data sync.
• Collaborate with cross-functional teams to deliver patient-facing features that scale to thousands of providers.
• Write high-quality, maintainable code with a focus on reliability and performance.

Hard Requirements

• 5+ years of software engineering experience in high-scale SaaS or AI-driven applications.
• Strong coding skills in Python, Node.js, or similar modern backend stack.
• Experience with APIs, data pipelines, and distributed systems.
• Proven track record delivering production-grade features end-to-end.
• Background in healthcare or EHR systems (FHIR, HL7).
• Experience with conversational AI, NLP, or dialogue management.
• Exposure to scheduling or workflow automation systems.
• Audit current scheduling reliability and identify key failure modes.
• Partner with product to refine conversational flow metrics.
• Deliver improvements to SMS/EHR integration pipelines.
• Success OKRs (90 Days)

Nice-To-Have

First-Month Focus

• Increase auto-scheduling success rate by >10%.
• Reduce conversational drop-off rates by >10%.
• Deliver fully synced SMS + EHR scheduling experience across 100% of test accounts.

Culture Fit

• Persistent, driven problem solver
• Willing to push back on leadership to defend quality/timelines
• Thrives in high-ambiguity, fast-paced startup environments
• Why Join Sully.ai?
• 🔥 Shape the Future of Healthcare: Build category-defining partnerships that enable doctors to focus on saving lives.
• 📈 Early-Stage Impact: Join early and play a critical role in shaping our partnership roadmap and overall company growth.
• 🌎 Remote-First Culture: Work with a talented, mission-driven team in a flexible, remote environment.
• 💰 Competitive Compensation: Enjoy a competitive salary, equity, and the opportunity to make a real difference.
• 🏆 Solve Scalability Challenges: Tackle complex challenges in a rapidly growing company, driving impactful change in healthcare.

Sully.ai is an equal opportunity employer. In addition to EEO being the law, it is a policy that is fully consistent with our principles. 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. Sully.ai prohibits any form of workplace harassment.