We're hiring a Full-Stack Mobile Engineer to join Lucida AI. This is a full-time, hybrid role for someone who wants to learn how a consumer AI product is built, shipped, and scaled from the inside. You'll work across the stack — mostly in Flutter, but touching backend and infrastructure wherever the feature needs it — to help improve the experience of millions of language learners around the world. This is not a passive internship. We're looking for someone who can write clean code, ship fast, debug hard problems, ask good questions, and take ownership of features end to end. Why join - Backed by top-tier investors ($7M raised) - Millions of users across global markets - Small, high-performing team - High ownership, fast decision-making, no bureaucracy - Potential full-time opportunity after graduation - Opportunity to help build a category-defining AI product Who you are - Highly curious about AI, mobile apps, consumer products, and real-time voice experiences - Comfortable building features in Flutter/Dart end to end — UI, state management, and API integration - Understand how to work with REST/WebSocket APIs, async flows, and app architecture - Care about performance, smooth UX, and shipping polished, bug-free builds - Comfortable reading and touching backend code when a feature demands it - Proactive, organized, detail-oriented, and comfortable following up - Don't wait for step-by-step instructions; you look for ways to add value - Comfortable working with data, logs, crash reports, and product metrics - Communicate clearly in English Bonus if you have: published apps on the App Store / Play Store, experience with real-time audio, native platform code (iOS/Android), CI/CD, or backend work (Node, Python, Go, etc.). What you'll work on - Jump into the real codebase from day one, not shadow from the sidelines - Build and ship features across the Flutter app — onboarding, lessons, roleplays, AI voice conversations, feedback flows, and monetization - Work on real-time voice interactions and the flows that make them feel instant and natural - Integrate with backend services and APIs, and dig into the backend yourself when needed - Chase down bugs, crashes, and performance issues, and improve app stability - Look at funnels, activation, feature usage, and paywalls to understand how your code affects real user behavior - Test features before they go live, challenge weak UX, question unclear copy, and push for the details that make the product better - Help ship fast, measure what happened, learn from the results, and move on to the next iteration - Sometimes you'll work on mobile. Sometimes on backend. Sometimes on QA or performance. Sometimes on things no one has a perfect job title for yet Important This role is designed for candidates who will graduate by June 2026 and will be ready to start working full-time after graduation. If you are not graduating by June 2026, this may not be the right opening for you.