Founding Full-stack Engineer

TwinTone is an AI company building monetizable AI Twins for creators that live stream, sell products, and drive revenue 24/7. The Founding Full-stack Engineer will own the technical architecture across frontend and backend, rebuilding the system to support real-time AI streaming at scale. This is a founder-level ownership role at an early-stage company backed by a16z with 2,000+ creators and 1.2B+ monthly distribution reach.

• Own architecture across frontend and backend systems
• Rebuild and harden the system for real-time AI live streams
• Scale concurrent AI video sessions with low latency requirements
• Design event-driven systems for AI responses and video pipelines
• Improve reliability across AWS, Supabase, React, and Java backend
• Optimize LLM and video inference costs
• Build features for AI live casino streams, AI live shopping, creator onboarding, brand dashboards, and distribution analytics
• Work directly with founder on roadmap and technical direction
• Hire and lead future engineering team

• Backend-leaning full-stack engineer with strong systems thinking
• Experience with React, TypeScript, NextJS (frontend)
• Experience with Java backend development
• Proficiency with PostgreSQL and AWS infrastructure
• Bonus: Real-time streaming systems (WebRTC, RTMP, HLS)
• Bonus: Event-driven architecture experience
• Bonus: AI video/voice APIs integration
• Bonus: High-concurrency systems experience
• Bonus: Payments or marketplace architecture
• Bonus: iGaming or betting infrastructure knowledge
• Builder mentality with strong opinions on clean architecture
• Deep care for latency, performance, and scalability

Location: San Francisco preferred, remote for exceptional candidates only

Start: ASAP

Equity: Meaningful founding equity with direct ownership of architecture

Benefits: Live AI product in market, real customers and revenue, opportunity to build infrastructure for AI-driven commerce and gaming, capital raising and expansion into iGaming and social commerce partnerships