Staff 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 Staff Software Engineer to lead the technical vision for Sully.ai’s Receptionist Agent. You will architect systems that improve auto-scheduling reliability, elevate conversational flow, and guarantee seamless EHR and SMS integration at scale. This is a hands-on technical leadership role: setting standards, reviewing designs, and guiding a team of engineers to deliver features that directly impact patient experience and physician efficiency.

Key Responsibilities

• Define technical architecture for scheduling, conversational AI, and EHR/SMS integrations.
• Establish engineering standards for reliability, latency, and scalability in mission-critical workflows.
• Mentor and guide engineers, conducting reviews and fostering technical excellence.
• Drive innovation in conversational design to reduce patient friction and increase trust.
• Collaborate with product leadership to align technical decisions with business impact.

Hard Requirements

• 8+ years of software engineering experience, with 3+ in a staff/principal-level role.
• Expertise in distributed systems, large-scale API integrations, and system reliability.
• Strong track record of architectural leadership and cross-functional influence.
• Deep coding experience in at least one modern backend language (Python, Go, Node.js, Java).
• Prior work in healthcare, EHR integrations, or compliance-heavy systems.
• Experience with conversational AI frameworks or LLM-powered applications.
• Background in workflow orchestration or scheduling systems.
• Audit existing Receptionist Agent technical stack for reliability bottlenecks.
• Define technical roadmap for scheduling and integration improvements.
• Partner with Senior Engineers to implement first reliability upgrades.
• Success OKRs (90 Days)

Nice-To-Have

First-Month Focus

• Deliver architecture plan that supports 10x increase in scheduling throughput.
• Establish automated reliability monitoring across SMS and EHR sync pipelines.
• Reduce engineering incidents related to scheduling/EHR by >15.

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.