Full Stack Developer Intern

About LongRunWe're building an app that helps men 20-35 stop consuming self-improvement content and start taking real action. Through AI-powered goal discovery, personalized challenges, and accountability systems, we help people get off their phones and build the life they actually want.What We OfferLearning & DevelopmentClose collaboration with the Founder, UX/UI Designer, and 1-2 other developers from our small development teamReal full stack responsibility from day 1Hands-on experience with modern tech stack (React, Supabase, Claude API)Use of AI tools like Cursor for efficient developmentWork EnvironmentFlexible working hours and regular short stand-up team meetings to discuss project progress and solve problems together as a team, or just have fun Opportunity to have real impact on a young startupYour TasksMVP Development & EnhancementDevelopment and enhancement of a React-based web app based on professional Figma designs from our UX/UI Designer (e.g., Challenges, Community Feed, and Goal-Tracking Dashboard)Integration of advanced Claude API functionalities for personalized AI coaching featuresBackend, Database & AI IntegrationExpansion and optimization of the Supabase database for extended user data and app contentAdvanced integration of Claude API for complex AI-driven goal setting based on assessment responsesDevelopment of robust data flows between frontend, database, and AI servicesImplementation of new features and optimization of existing functionalitiesAbout YouTechnical SkillsCompleted Bachelor's degree in Computer Science, Business Informatics, or similarCurrent enrollment in a thematically relevant Master's programVery good knowledge of JavaScript/ReactUnderstanding of web development, databases & SQLUnderstanding of Supabase is a plus Experience with React Native is a plus Very good English skillsPersonal If you are curious, honest and want to make a positive impact on the world you will fit right in! DetailsDuration: 3 monthsHours: 20 hours/weekLocation: RemoteCompensation: Unpaid (may transition to paid role based on performance and company growth)Start: ImmediatelyHow to ApplyEmail simon@longrunhq.com with:CV/ResumeIf available: Portfolio/examplesOptional: Brief cover letter (Why LongRun? Why you?)Availability and earliest start dateOur Tech StackFrontend: React + TypeScriptBackend: Supabase (Database, Auth, APIs)AI Integration: Claude APIDevelopment Tools: Cursor, GitHub, Figma, Jira