Spurtest
Fullstack Engineer - Known
San Francisco
Sponsorship not specifiedDetected 287 days ago
TypeScriptReactReact NativeNode.jsBackend DevelopmentFull-Stack DevelopmentGitPostgreSQLAWSGCPCloud PlatformsCI/CDRESTWebSocketsMachine LearningLLMsA/B TestingVoIPCommunication
About the role
- You'll ship features that blend beautiful UI, intelligent data flows, and third-party services into a cohesive, consumer-grade experience that feels magical.
- 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.
- 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.
- You'll work closely with the founding team (AI/ML, product, and design) to translate ambitious product ideas into production code.
- Design a reservation and payment integration layer that allows users to book dates, split costs, and receive confirmations - all within the app.
- Create a real-time messaging system with typing indicators, read receipts, and optional AI-powered conversation starters using WebSockets and streaming LLM responses.
Requirements
- Strong proficiency in TypeScript, React, React Native, and Node.js.
- Experience designing and scaling RESTful APIs with attention to performance, security, and maintainability.
- Strong working knowledge of Postgres - you're comfortable with data modeling, queries, indexes, and database performance.
- Experience with cloud platforms (AWS, GCP, Vercel, Railway) for deployment and infrastructure.
Nice to have
- Familiarity with WebSockets and WebRTC for real-time communication is a plus.
Benefits
- Expand the admin dashboard with new functionality for monitoring user activity, system health, and ML model performance metrics.
- Implement analytics and instrumentation to measure user engagement, conversion funnels, and product health in real time.
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This listing is sourced directly from Spurtest's careers page and normalized into a canonical job model.