Full-Stack Developer for Comprehensive Platform

**THE PDF FILE HAS MORE DETAILS Independent Full-Stack Product Builder Needed for Proprietary Multi-Portal Platform I’m seeking an independent full-stack product designer/developer to audit and advance a proprietary platform combining a public website with three authenticated portals: * Client Portal * Studio Admin Portal * Artist Professional Portal This is not a basic website, landing page, or form project. It will involve platform architecture, UX/UI, full-stack development, role- and record-level permissions, complex workflows, secure data handling, AI-assisted functionality, testing, deployment, and future expansion. The first step is a paid technical discovery engagement to validate the existing foundation, define a practical MVP, and establish a clear development path. Existing Foundation You will not start from a blank page. Current materials include: 1. Product vision and architecture 2. Branding and design direction 3. Portal structures and navigation 4. User roles and workflows 5. Information architecture 6. Functional requirements and business rules 7. Data relationships 8. AI concepts and workflow ideas 9. Future expansion plans 10. Developer handoff materials 11. Initial development code The codebase is a starting point, not a constraint. You should be comfortable recommending what to preserve, refactor, replace, or rebuild. Platform Overview Public Website A public-facing website with content, resources, forms, navigation, and entry points into the platform. Client Portal An authenticated environment for account management, guided intake, questionnaires, approved information and file submission, progress tracking, personalized workflows, and deliverables. Studio Admin Portal An authenticated environment for authorized staff to manage users, records, workflows, tasks, permissions, documentation, operations, and AI-assisted processes. Artist Professional Portal An authenticated environment for authorized professionals to access assigned information, records, tasks, files, workflows, communications, and role-specific functionality. The preferred direction is one unified application with role-based authentication and permissions. Potential Scope Work may include: 1. Product architecture and technical planning 2. UX/UI and responsive design 3. Website and portal development 4. Authentication and account management 5. Role- and record-level permissions 6. Database, API, and backend development 7. Secure file and image storage 8. Complex forms and conditional workflows 9. Branching, dependencies, and save/resume functionality 10. Notifications, tasks, and status tracking 11. Search, filtering, and dashboards 12. Data routing and structured records 13. Integrations 14. Testing, QA, deployment, and documentation 15. Maintenance and future development AI and Workflow Engine A major component will be an AI intelligence layer integrated into the platform, not a standalone chatbot. Potential capabilities include guided intake, dynamic questionnaires, conversational follow-up, information extraction, classification, summarization, analysis, prioritization, task generation, recommendations, draft communications, structured deliverables, authorized information retrieval, human review, and future image analysis. Workflows may include branching, dependencies, dynamic questions, contradiction detection, escalation, review queues, role-specific routing, automation, structured outputs, records, history, and permission-controlled information sharing. The architecture should allow workflows, questions, rules, permissions, and outputs to evolve without rebuilding the entire application. Phased Engagement Phase 1: Paid Technical Discovery and MVP Plan The first assignment will: 1. Audit the existing code, architecture, designs, workflows, database, permissions, handoff materials, and AI concepts 2. Identify risks, gaps, dependencies, and security concerns 3. Determine what to preserve, refactor, replace, or rebuild 4. Validate core user journeys 5. Separate MVP requirements from future functionality 6. Recommend the technology stack and architecture 7. Define implementation and testing strategy 8. Estimate effort, timeline, infrastructure, and major costs Deliverables should include a technical audit, risk assessment, recommended architecture, MVP scope, prioritized roadmap, data and permissions recommendations, AI integration plan, estimated timeline and budget, and a clear decision point for development. This phase may be a fixed-price milestone or capped hourly engagement. Phase 2: MVP The MVP should establish a secure end-to-end foundation including: 1. Public website 2. Shared authentication 3. Core database 4. Role-based permissions 5. Client Portal 6. Studio Admin Portal 7. Essential Artist Professional Portal 8. Core intake and conditional logic 9. Secure records and files 10. Authorized data routing 11. Limited human-reviewed AI functionality 12. Notifications and task tracking 13. Audit logging 14. Testing and deployment Phase 3: Expansion Future work may include advanced AI, expanded questioning, automation, image analysis, dashboards, reporting, configurable workflows, integrations, additional roles, AI monitoring, performance improvements, and advanced deliverables. Security and Privacy Relevant experience should include secure authentication, least-privilege access, encryption, protected file storage, consent, data minimization, retention and deletion controls, AI provider security, protection against data leakage and prompt injection, audit logs, backups, recovery, security testing, and human oversight. User data may not be used for external model training without authorization. Ideal Candidate I’m seeking one highly capable independent professional, not a large agency. Relevant experience includes: 1. Full-stack SaaS and platform development 2. Multi-portal systems 3. Client and admin applications 4. Role-based access control 5. Database and API architecture 6. Complex forms and wo