Founding Software Engineer (Stealth Project)

Company DescriptionMomentum Labs NYC is a product studio based in New York City, focused on building AI-powered tools that make personal growth intuitive, actionable, and emotionally intelligent. We are currently developing a prototype for a stealth project centered at the intersection of AI, behavior change, and mobile consumer experiences.Our leadership team includes operators with backgrounds at McKinsey, Goldman Sachs, and top-tier MBA programs, bringing deep experience across strategy, consumer product innovation, and venture building. We’re now assembling early technical collaborators to shape and build our v0 product.This is a unique opportunity to join at the earliest stage and influence both the architecture and the product direction before launch.ResponsibilitiesBuild simple, fast, mobile-first experiences for v0Architect the backend and set up core infrastructureDevelop lightweight APIs and real-time featuresIntegrate AI workflows (LLMs, embeddings, semantic search) into user flowsRapidly prototype, test, and iterate on conceptsCollaborate directly with the operator/founder team on product strategyInfluence long-term technical decisions and roadmapIdeal ExperienceFrontend / MobileReact, React Native, Expo, TypeScriptStrong intuition for mobile UX and clean UI patternsExperience with animations, modals, or state management toolsBackendNode.js or PythonSupabase (Auth, Postgres, Edge Functions) or equivalentServerless deployments (Vercel, Cloudflare, AWS Lambda)Designing RESTful APIs or lightweight microservicesPGP LaravelAI / LLM IntegrationOpenAI / GPT-4o or other LLM APIsPrompt engineering + structured prompt pipelinesVector search (Supabase Vector, Pinecone, Weaviate, etc.)RAG workflows, embedding strategies, and retrieval pipelinesExperience building agent-style flows is a plusGeneral QualitiesThrives in early-stage ambiguityComfortable owning large parts of the tech stackBias toward action and iterationInterested in wellness, behavior change, personal optimization, or consumer productsThinks strategically to create systems that gather valuable data to rapidly scale key featuresCompensationWe offer a flexible cash + equity model based on skill level, ownership, and scope of contribution. We are early, flexible, and committed to structuring a fair partnership. Starting part-time with potential to expand into a founding role.DetailsRemote (NYC preferred but not required)Nights/weekends friendlyFlexible scope: Contract → Part-Time → Potential Founding RoleStealth until prototype launchApplySubmit via LinkedIn or email: momentumlabs.nyc@gmail.comMore details shared privately due to stealth mode.