Founding Senior Software Engineer (Frontend) [32479] Founding Senior Software Engineer (Frontend) [32479] We're not just automating calls—we’re transforming how the world communicates. Our AI voice agents are reshaping sales, support, and customer engagement for leading brands. Backed by Alt Capital, Y Combinator, and top-tier investors, we've raised $4.7M in seed funding and hit $14M ARR with just 12 people. We’re one of the fastest-growing Voice AI startups and we're on a mission to become the standard for voice automation at scale. About the Role As a Founding Senior Frontend Engineer, you’ll shape the user experience of our AI voice platform, building intuitive interfaces and tools that power millions of automated conversations. You’ll work across the stack, focusing on React and TypeScript, and collaborate with the founding team to deliver fast, beautiful, and scalable solutions. Key Responsibilities Design and build core UI features like prompt management, dashboards, and analytics tools. Collaborate on backend APIs and DevOps to ensure seamless, scalable systems. Lead frontend projects from concept to launch, owning architecture, coding, and iteration. Work with customers to onboard, debug, and turn feedback into UX improvements. Have 2+ years of experience building production-grade apps with React and TypeScript. Hold a degree in CS, CE, or equivalent practical experience. Take ownership like a founder, proactively solving problems with clean design thinking. Thrive in fast-paced environments, quickly learning new tools and frameworks. Collaborate effectively, balancing clarity and momentum in small, dynamic teams. Job Type : Full-time, 70 hr/week (50 hr/week onsite with flexible hours + 20 hr/week work from home) Cash: 215k - 290k Equity : 0.4 - 0.6% Location : Redwood City, CA, US US Visas : Sponsors Visa & Green Card Other Benefits Unlimited breakfast, lunch, dinner, and snacks Gym and daily commute fee reimbursement Internet and phone bill covered Compensation Philosophy Best Offer Upfront : Choose from three cash-equity balance options, no negotiation needed. Top 1% Talent : Above-market pay (top 5 percentile) to attract high performers. High Ownership: Small teams, >$1M revenue/employee, and significant equity. Performance-Based : Offers tied to interview performance, not experience or past salaries. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Industries Technology, Information and Internet Referrals increase your chances of interviewing at Stealth Startup by 2x Sign in to set job alerts for “Software Engineer” roles. Mountain View, CA $145,000.00-$170,000.00 1 week ago Software Engineer, AI Platform - New Grad Mountain View, CA $145,000.00-$170,000.00 1 week ago Mountain View, CA $138,225.00-$207,575.00 1 week ago Software Engineer (L4), Content & Business Products Software Engineer, Frontend (All Levels) Mountain View, CA $130,000.00-$176,000.00 4 days ago San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $125,000.00-$218,900.00 5 days ago Software Engineer, AI Intern (Winter 2026) San Francisco, CA $57.00-$61.00 2 days ago Software Engineer, AI Intern (Summer 2026) San Francisco, CA $57.00-$61.00 2 days ago San Francisco, CA $150,000.00-$180,000.00 6 days ago San Francisco, CA $255,000.00-$405,000.00 2 days ago San Jose, CA $113,400.00-$206,300.00 1 week ago San Jose, CA $100,500.00-$173,250.00 2 days ago San Mateo, CA $110,000.00-$135,000.00 1 week ago San Jose, CA $113,400.00-$206,300.00 1 week ago Software Engineer (Fullstack) - Payments San Francisco, CA $163,200.00-$223,200.00 2 days ago Frontend Software Engineer - University Graduate 2025 San Mateo, CA $120,000.00-$165,000.00 1 week ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

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