Founding Full Stack Engineer at Text.ai | Y Combinator
Founding Full-Stack EngineerReady to build the next generation of AI-native consumer experience?Text.ai (http://Text.ai) is a consumer-first AI native company, revolutionizing how people communicate in group chats.We’re pioneering an entirely new category of consumer AI products that millions will use daily. We are building the first AI-native communication platform, where every conversation becomes intelligent, collaborative, and effortless. We’re reimagining how humans and AI work together from first principles.While everyone else builds individual AI assistants, we’re solving the hardest problem in consumer AI: making multiple humans happy simultaneously through true group intelligence.Our AI doesn’t just respond to prompts. It stays, learns, thinks, and adapts to make every human connection better. From planning the perfect group trip to finding restaurants everyone will love, we transform chaotic group coordination into effortless collaboration.The future isn’t prompt → response.It’s presence → understanding → creation.We are backed by Y-Combinator, SV Angel, and angel investors from Shopify and Tencent, with founders from Ex-Tesla, Eventbrite, Amazon, & McKinsey.The RoleWe’re hiring a Founding Full-Stack Engineer (Frontend/Backend) to be the technical owner and driver of our new app experience. This is a very hands-on role focused primarily on React Native (iOS and Android), along with Backend (Python) integration. You will be joining the founding team and taking the lead on building our mobile app from the ground up, while also contributing to backend integration tasks when needed.This isn’t your first native app launch. You’ve done this before, you are a seasoned engineer and know how to ship bug-free, polished, and high-performing apps. You’ll work closely with design, product, and engineering stakeholders to build intuitive and beautiful experiences, FAST.What makes this role extraordinary:Category Creation: You’re not iterating on existing patterns. You’re inventing new ones that will define how humans and AI collaborate.Massive Scale Potential: Early product-market fit signals with explosive organic growth. Your work will impact millions of daily conversations.Technical Innovation: Implementing AI capabilities that don’t exist anywhere else, group preference learning, multi-participant coordination, social facilitation algorithms.Founding Impact: Direct influence on product direction, technical architecture, and company culture.What You’ll BuildOwn the Mobile Platform (Primary Focus)Lead development of our React Native app from ground zero to millions of usersCreate seamless group collaboration experiences impossible on any other platformBuild AI-native interfaces that feel magical, not mechanicalShip polished, performant experiences across iOS and AndroidShape Our Technical FutureArchitect mobile backend (Python) integration for real-time group AI coordinationImplement cutting-edge GenAI features, you’ll be implementing AI features that don’t exist anywhere else.Design systems that scale from thousands to millions of concurrent conversationsBecome a true full-stack powerhouse working across our entire technical ecosystemCollaborate Across DisciplinesPartner with design and product to bring completely new interaction patterns to lifeWork directly with founders on product strategy and technical roadmapHelp build the engineering culture and practices for our growing teamWho You AreTechnical Excellence4+ years shipping React Native apps that users love, you know what separates good from great in mobile UXFull-stack capability with backend integration experience (Python/modern web stack)Consumer product instincts, you obsess over performance, polish, and user delightSenior ownership mindset, you set direction, drive decisions, and own outcomesStartup DNAThrives in ambiguity, comfortable building new things without established playbooksShips relentlessly, measures iteration cycles in days, not monthsQuality obsessed, won’t ship anything you wouldn’t personally use and loveTeam player, humble, hardworking, ready to do whatever it takes to move the team forwardBonus SuperpowersExperience with GenAI/LLM integration in consumer productsBackground in social/communication platformsMobile app performance optimization expertiseUnderstanding of viral growth mechanicsWhy (http://text.ai)Text.ai (http://Text.ai)Product-Market Fit SignalsWe’ve found something real. Organic word-of-mouth growth, high user engagement, and genuine user love with millions of messages transacted in just a few months.World-Class BackingY Combinator, SV Angel, and angels from Shopify and Tencent. Founding team from Tesla, Eventbrite, Amazon, and McKinsey.Technical ChallengeYou’ll work on problems that don’t have Stack Overflow answers. Group AI coordination, social preference learning, multi-participant optimization - this is frontier territory.Culture & ValuesHumble excellence - Big ambitions, zero egosOwnership mentality - Everyone leads, everyone contributes, everyone winsLearning velocity - New challenges, new growth every single dayImpact focus - Your work directly shapes how millions of people connectBenefitsThis position offers:Competitive PayMeaningful Equity401k PlanFitness and Gym ReimbursementReady to Build the Future?This isn’t a FAANG role where you’ll optimize conversion rates by 0.1%. This is your chance to architect the foundational technology and new experience for how humans and AI will collaborate for the next decade.We’re looking for engineers who want to build something that matters, ship something people love, and create technology that makes human connection more effortless and joyful.When you apply, please include:Your resume or description of recent technical experienceWhy you’re excited about this specific opportunity and what draws you to (http://text.ai)Text.ai (http://Text.ai)Links to apps you’ve shipped, GitHub repos, or anything that showcases your workWhat excites you most about building collaborative AI experiences
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