Full-Stack / Backend Engineer (Core System) — elephAi / Unwind MindsRemote · Part-time now → Full-time · Pre-seed (stock options after raise)We’re building elephAi - an emotionally intelligent AI system for pregnancy, postpartum, and family wellbeing.This is not a typical app.It’s a living system powered by our own multi-layer AI engine (LFI) with:Hardshield (safety + decision layer)Brain (reasoning + orchestration)Heart (empathetic response layer)The foundation is already live. MVP is out. Now we need someone to step in and own the bridge between the system, backend, and product.This is a core role - replacing a key engineer who built part of the system.Why is this a serious opportunityYou’re not joining a finished product - you’re shaping the core systemYou’ll work on an AI product designed to reach millions of usersYou’ll be part of the founding technical layer, not a late hireYou’ll directly influence architecture decisions (not just execute tickets)If you want to build something that actually matters - this is exactly it.What you’ll doTake ownership of backend + system integration layerContinue development of Hardshield (rule-based safety + routing system)Build and maintain APIs connecting:App (Flutter)ML systems (LFI engine)Database (Postgres / Firebase transition)Design clean data flows (chat, emotional signals, scoring, history)Handle auth, subscriptions (Revenue Cat), entitlements, and user stateWork with AWS infrastructure:ECS / FargateRDS (Postgres)API layerClean up and stabilize existing backend (some legacy, some new)Ensure system reliability before scale.Tech, we expect you to handleYou don’t need perfection - but you need confidence.Backend: Node.js (Nest/Express) or similarDatabase: Postgres (RDS), Firebase/Firestore understandingAWS: ECS, basic networking, deployments, environment handlingAPIs: clean REST design, auth flows, state managementGitHub: branches, PRs, ownership mindsetAI integration: consuming ML endpoints (we have an ML team)Bonus: subscriptions (Apple / Google), event handlingWho you areYou take ownership - not tasksYou can enter a half-built system and make sense of it fastYou don’t freeze when things are messyYou’re comfortable being the bridge between ML, product, and backendYou communicate clearly and move fastYou want to build one meaningful product — not juggle five clientsCurrent situationMVP is already live (Android + iOS)Backend is on AWS - evolvingHardshield exists but needs continuation and refinementTeam includes:ML engineerFrontend/mobile developerFounders (product + architecture)You are stepping into a critical position, not starting from zero.What we offerCore team position from day oneDirect work with founders and ML teamReal ownership of system architectureStock options after pre-seed roundTransition to salary post-raiseA product that actually impacts real livesHow to applySend:2–3 real projects (GitHub, live apps, anything shipped)Your strongest stackYour experience with backend + AWS (briefly)When can you startIf you’re good, you’ll know this is a rare entry point.

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Full Stack Developer