Staff/Senior Platform Engineer at Arini (W24) $150K - $250K • 0.10% - 0.50% AI receptionist for dentists San Francisco Full-time US citizen/visa only 3+ years About Arini At Arini, we are building the AI-native operating system for dental groups. Arini is the AI receptionist for dentists that answers phone calls and schedules appointments. Most dental appointments are scheduled over the phone by overworked receptionists who put patients on hold and miss a third of incoming calls. Arini is the AI-native operating system for dental groups. We've built agents that take over the patient engagement journey through calls and texts, and we are on a mission to build deeper dental agents that focus on revenue cycle management, top-of funnel, and more. Over the last few months, we went from answering a few calls a day, to answering 100% of calls. Today, dentists all over the US and Canada are trusting us with their phones, calendars, and revenue. We are making generative AI available to those who need it the most. About the role The AI Operating System for Healthcare Healthcare runs on legacy software that was last updated a decade ago. Systems don’t talk to each other. Interfaces lag. “Automation” means someone copy-pasting data between tabs. At Arini , we’re leap-frogging the SaaS era. No more EHRs, no more outdated dashboards, just agents and a database. We’re building the AI operating system for healthcare systems , starting with dental enterprises. Our platform automates phones, scheduling, insurance verification, and workflows across the stack. We partner with the largest healthcare enterprises, understand their bottlenecks, and build well architected system to optimize their operations. The Team We’re a small, elite team of builders and operators who move fast and own outcomes. Our team comes from Meta, SpaceX, Tesla, MIT, Berkeley, Harvard, and other YC startups and were previously founders who’ve built and exited healthtech companies. We’re obsessed with reliability, real impact, and replacing slow legacy systems with software that just works. The Role You’ll build the infrastructure that lets millions of autonomous agents run reliably and serve the healthcare industry at scale. This is the backbone of Arini: scalable event pipelines, multi-tenant voice infrastructure, high-availability APIs, and the agent runtime layer. You’ll own systems end-to-end: architect, build, ship, measure ROI. What you’ll do Design and scale the backend systems powering millions of patient interactions. Build the event-driven architecture for voice, scheduling, and data ingestion. Optimize performance, cost, and observability across services. Own reliability, latency, and uptime across the stack. Preferred Qualifications Senior/Staff level experience building and scaling infrastructure Passionate about building infra that’s simple, predictable, and elegant. Experience with data warehousing and pipelines Benefits Competitive salary with meaningful equity Free health, dental, and vision insurance Free in-office lunch and dinners Unlimited PTO