Sr Founding Full Stack SWE

Senior Founding Full-Stack Engineer About the Company Our client is a fast-growing Y Combinator-backed Voice AI startup transforming sales, support, and customer engagement. With $5M in seed funding and approaching $30M ARR already, achieved with just 20 people, they're building the standard for voice automation at scale. The Role As a Founding Senior Full-Stack Engineer, you'll build the core platform powering millions of AI-driven conversations. Working with React, TypeScript, and Node.js, you'll create scalable systems and intuitive interfaces that enable seamless customer experiences. Key Responsibilities Develop core features including prompt orchestration, dashboards, analytics, and telephony integrations Build full-stack systems from polished UIs to robust APIs and DevOps workflows Own projects end-to-end from architecture to production deployment Create intuitive interfaces enabling rapid customer activation Support customer onboarding and translate feedback into product improvements Requirements 2+ years full-stack experience with React, TypeScript, Node.js, or Python CS/CE degree or equivalent practical experience Ownership mindset with ability to solve problems independently Thrives in fast-paced, dynamic environments Strong communication and collaboration skills Compensation & Benefits Salary: $200K - $280k USD Equity: 0.25% - 0.45% Schedule: Full-time, 70 hrs/week (50 onsite + 20 remote, flexible hours) Location: Redwood City, CA 100% medical, dental, vision coverage Unlimited meals and snacks Gym and commute reimbursement Visa sponsorship available (H1B, TN, L-1, E-3, F-1, O-1) Interview Process Online coding assessment (25-30 min) Technical phone interviews (2 rounds) Onsite/virtual interviews: practical coding, system design, and automation