Sr Founding Full Stack Software Engineer Join to apply for the Sr Founding Full Stack Software Engineer role at Syndesus, Inc. Get AI-powered advice on this job and more exclusive features. 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 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 Equity: 0.25% - 0.45% Schedule: Full-time, 70 hrs/week (50 onsite + 20 remote, flexible hours) Location: Redwood City, CA Unlimited meals and snacks Gym and commute reimbursement Interview Process Online coding assessment (25-30 min) Technical phone interviews (2 rounds) Onsite/virtual interviews: practical coding, system design, and automation Seniority level Mid-Senior level Employment type Full-time Job function Engineering and Information Technology Industries Software Development and Technology Information and Media

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