Full-Stack React/Next.js Developer Needed for Marketplace Platform

Full-Stack React/Next.js Developer Needed for CrewUp Marketplace Platform CrewUp is a B2B web marketplace that connects general contractors with subcontractors. The platform helps construction professionals find work, hire qualified crews, manage opportunities, and build dependable business relationships. We are looking for an experienced Full-Stack Developer to continue building the application within our existing codebase and technology stack. Website: crewupapp.co Project Details - Fixed budget: $100 total — final budget - Timeline: 7 calendar days total - Engagement: Full-stack development - Stack: React, Next.js, Supabase, GitHub, Vercel, Stripe, and third-party APIs Please apply only if you are comfortable with both the fixed budget and 7-day timeline. Before You Apply Please review each UI design carefully—at least three times—before submitting a proposal. - General Contractor UI Design: dropbox.com/scl/fo/s2hfx9h4kp3yk7gwfg5h3/AJrXAAyyhyLmhXULmIhX8YA?rlkey=nx2o7gw8mw037vlwfwrhma1ny&dl=0 - Subcontractor UI Design: dropbox.com/scl/fo/u9lhc0zehksu4sl3btign/ACpBJr-RHIzKCI-glKWT-24?rlkey=3fhan33oaqz9h7gpls8nz6u4n&dl=0 Scope of Work You will continue developing CrewUp as a complete B2B SaaS product. Responsibilities may include: - Building and refining front-end pages and responsive user interfaces - Developing back-end functionality, database features, and APIs - Working within the existing React, Next.js, Supabase, GitHub, and Vercel environment - Integrating Stripe payments - Improving marketplace features, user flows, and overall user experience - Supporting contractor and subcontractor workflows, profiles, opportunities, messaging, and related platform features - Writing clean, organized, reusable, production-quality code - Reviewing and understanding the existing application before making changes You will be expected to demonstrate that you can understand and work effectively within the current application stack and codebase. Required Experience Please do not apply unless you meet every requirement below: - At least 4 years of professional React experience - Proven full-stack development experience with React and Next.js - Strong experience building modern, responsive web applications - Experience with Supabase or comparable database/authentication platforms - Experience integrating APIs and dynamic application features - Strong understanding of components, props, hooks, state management, routing, and application architecture - Ability to diagnose issues, solve problems independently, and follow detailed instructions - Strong written communication and consistent project updates Clear communication is mandatory. We expect regular progress updates throughout the project. Application Instructions To be considered, include all of the following in your proposal: 1. Your total years of professional full-stack development experience. 2. Links to exactly three live, professional React or Next.js applications you have built. - Include live production links only. - Do not provide more than three examples. - Projects hosted solely on a ".vercel.app" domain will not be accepted. - Applicants without three qualifying live projects will not be considered. 3. A brief explanation of how you would improve CrewUp as a contractor/subcontractor marketplace platform. 4. Confirmation that you understand and accept the final $100 fixed budget. 5. Confirmation that you have reviewed the UI designs and agree to the project requirements, communication expectations, and 7-calendar-day deadline. Important This is not a beginner project. We are seeking a developer with proven professional React and full-stack experience who can quickly understand an existing production codebase and continue building the platform efficiently. Applicants may be asked questions about the current application and technology stack to evaluate their experience before hiring.