Fullstack Engineer - Known

About the Role

You'll be a core technical founder building the entire product surface of Known - from the mobile app users fall in love with, to the backend systems that power matching and conversation, to the API integrations that make dating effortless. You'll ship features that blend beautiful UI, intelligent data flows, and third-party services into a cohesive, consumer-grade experience that feels magical.

You'll work closely with the founding team (AI / ML, product, and design) to translate ambitious product ideas into production code. This is a high-ownership role where you'll architect systems, make critical technical decisions, and directly shape how millions of users experience Known.

Responsibilities

• Build and ship mobile experiences in React Native that are fast, delightful, and accessible - from onboarding flows to real-time messaging and match discovery.
• Design and maintain backend services in Node.js / TypeScript, including RESTful APIs, WebSocket connections for real-time chat, and WebRTC integrations for audio / video experiences.
• Integrate third-party platforms (OpenAI / Anthropic LLMs, Apple / Google Pay, reservation systems, SMS / push notifications) to deliver seamless, automated experiences.
• Collaborate with AI / ML engineers to surface model outputs - compatibility scores, personalized recommendations, conversational agents - through intuitive UI and performant APIs.
• Own infrastructure and deployment using modern cloud platforms, ensuring reliability, security, and scalability as we grow.
• Implement analytics and instrumentation to measure user engagement, conversion funnels, and product health in real time.

Requirements

Example Projects

Why This Role

This is a chance to be a technical co-architect of a consumer AI product from the ground up - to own the entire stack and ship features that directly impact how people meet, connect, and fall in love. You'll work at the intersection of design, data, and AI , with the autonomy to build systems your way and the responsibility to make them world-class.