Full-Stack Developer (Junior)
Role Overview
This junior full-stack developer role involves building the user-facing web application, including dashboards, reports, and admin views, while implementing supporting systems like notifications and emails. You'll work directly with a senior developer and CTO in a small, fast-moving team, contributing to database schema design and shipping code to real users quickly. The role requires following detailed specs, handling shifting priorities, and using AI coding tools as part of your daily workflow.
Perks & Benefits
This is a fully remote position with worldwide location, offering direct mentorship from senior developers and CTO, real architectural conversations, and fast-paced learning in a ground-floor startup environment. You'll have daily syncs and code reviews, with your work shipping to pilot clients within months, providing immediate impact and feedback. The culture emphasizes clear communication, adaptability to changing priorities, and a hands-on, collaborative team dynamic.
Full Job Description
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
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