B2B Marketplace App Development - Worklens

Title: Full-Stack Developer/Agency Needed — B2B Marketplace Platform (MVP, 4-Week Delivery) Category: Web Development / Web Application Budget type: Fixed price, milestone-based Project description: We are building Worklens, a B2B platform that connects businesses with independent professionals for assignment-based work (market research, field surveys, partner engagement, training). Think "on-demand marketplace" with three user types: Client, Professional, and Admin. We already have: - A working interactive prototype (HTML/CSS/JS) showing all screens and flows - A complete UI/UX design system (colors, typography, components) - A full written business/functional specification You will build the production version with a real backend and database, following the existing design and flows closely. PHASE 1 SCOPE (required in 4 weeks): - User authentication for 3 roles: Client, Professional, Admin (signup, login, password reset) - Client portal: assignment creation wizard, dashboard, deliverable approval - Professional portal: profile, browse/accept/decline assignments, submit deliverables (file/photo/text upload) - Admin panel: verify professionals, manually assign professionals to assignments, approve/reject deliverables, manage users - Email notifications for key status changes - Simple invoice generation (PDF) + manual "mark as paid" status - Fully responsive (mobile browser + desktop) - Deployed to production with HTTPS and a custom domain OUT OF SCOPE for Phase 1 (do not build yet): payment gateway integration, AI matching, native mobile apps, advanced analytics. Tech stack: open to your recommendation, but should be a common, well-supported stack (e.g., React/Next.js + Node.js/Django + PostgreSQL, or similar) that a second developer could maintain later. Please state your proposed stack in your bid. Deliverables: - Full source code (we retain all IP/ownership) - Deployed, working production site - Basic technical documentation (setup, environment variables, deployment steps) - 2 weeks of post-launch bug-fix support included Timeline: 4 weeks from kickoff, in weekly milestones: - Week 1: Environment setup, auth, database schema, deployed staging link - Week 2: Client portal complete - Week 3: Professional portal + Admin panel complete - Week 4: Testing, bug fixes, production deployment To apply, please share: - 2–3 similar past projects (marketplace, booking, or assignment-based platforms preferred) - Your proposed tech stack and why - Your availability for daily/alternate-day check-ins during this 4-week sprint