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Full-Stack Developer (Junior) at LeadUp AI. Location Information: Anywhere in the World. . . Headquarters:. United States . URL:. . http://www.leadupgym.com. . . The Role. . You build the majority of the user-facing application. You work from a detailed specification and follow patterns set by the senior developer. AI coding tools are a core part of your workflow.. . This is a fast-moving environment. You’ll have clear specs, but priorities will shift as the product meets real users. We need someone who treats that as normal.. . Why this is different from most junior roles: You're not joining a 50-person engineering team where you'll spend six months on a button. You work directly with the senior developer and the CTO - both hands-on builders. You'll get real code reviews, real architectural conversations, and real mentorship. The product is being built now, with pilot clients coming within months. Your code ships to actual users, fast.. . What You’ll Do. . . . Build the full user-facing web application: dashboards, reports, settings, onboarding. . . . Build admin views: user management, configuration, aggregate data. . . . Implement supporting systems: notifications, emails, exports. . . . Write tests against defined error scenarios. . . . Contribute to database schema design alongside the senior developer and the CTO. . . . Daily sync with senior developer; PR review on every merge. . . . Required. . . . 1–3 years of professional development experience (internships and freelance count). . . . React (or Next.js) for frontend, Python for backend (FastAPI experience is a strong plus). . . . Basic PostgreSQL: can write queries, understands joins, can contribute to schema design. . . . Active AI coding tool user (Claude Code, Cursor, Copilot) — part of your daily workflow. . . . Can read a spec and ship features without hand-holding. . . . Comfortable with changing priorities. . . . Asks questions when unclear rather than guessing. . . . Solid written and spoken English. . . . Preferred. . . . FastAPI experience. . . . Tailwind CSS, responsive design. . . . Authentication flows (OAuth, JWT). . . . Dashboard or report-style interfaces. . . . Portfolio or GitHub showing end-to-end projects. . . . Why Join. . You won’t guess what to build. Detailed spec. Your creativity goes into quality and speed.. . You’ll learn from strong people. Senior developer sets patterns. CTO works hands-on with the team.. . Your work ships fast. Pilot clients within months. Real users, real feedback.. . Ground floor. The product is being built now. If it succeeds, you were there from the beginning.. . Process. . 1. Application review. . 2. Technical conversation with the CTO. . 3. Offer. If the interview goes well, we move fast. . To apply:. . https://weworkremotely.com/remote-jobs/leadup-ai-full-stack-developer-junior.