Senior WordPress + React Full-Stack Developer — Implement Existing Website/Application Handoff

Yes. Below is your complete posting, with my recommended additions already integrated. You can copy/paste this directly into Upwork. Senior WordPress + React Developer to Implement Complete Existing Website/Application Handoff We are looking for an experienced WordPress + React developer to implement an already-developed website/application from a comprehensive developer handoff package. This is NOT a website design project. The frontend UI, application workflows, data structures, architecture, documentation, visual references, and implementation requirements have already been developed. We need a developer who can review the complete handoff, understand the existing system, and accurately implement it in production. The project is for a commercial lighting company and includes both a public website and a more advanced product/project application. The implementation includes: WordPress production implementation Existing React frontend/application Home, Services, Contact and other public pages Complete Products catalogue Dynamic Product Detail pages Projects / Portfolio Dynamic Project Detail pages Customer My Projects workspace Product-to-Project assignment Product configuration / ordering guides Complete product catalogue/data Product technical resources and media Project data and relationships QR-code functionality Project installation information Product/factory label functionality Search and filtering User/account-related application functionality Migration from prototype/local persistence to appropriate production persistence WordPress/API/database integration where required Responsive implementation QA and deployment A complete developer handoff package is available containing source code, production build materials, architecture documentation, data structures, product/project information, implementation instructions, WordPress migration information, QA documentation, visual references, and related technical resources. The existing AnyGen implementation can also be viewed as a visual and functional reference. Important We are not looking for someone to simply copy the visible AnyGen pages into WordPress. The developer must first review the handoff package and understand which parts are: editable WordPress/content functionality React/application functionality structured Product data structured Project data persistent application data API/backend functionality technical resources/media migration requirements The objective is to implement the existing system correctly, not replace it with a simplified WordPress recreation. The supplied developer handoff is not merely reference material. It defines the existing approved system that is being implemented. Existing approved functionality, data relationships, workflows and architecture documented in the supplied Resolve Lighting developer handoff must be preserved unless a change is explicitly approved. The developer must not silently simplify functionality, remove features, replace application functionality with static WordPress pages, change established data relationships, merge or rename existing concepts, substitute missing functionality, create parallel/disconnected data structures, or hard-code functionality that is intended to derive from structured data. If the developer believes an architectural or implementation change is required, it must be identified and discussed before that change is made. Required Experience Strong experience with: WordPress development Custom WordPress plugins PHP React / JavaScript / TypeScript REST APIs Database design Dynamic templates Authentication/user data Structured data migration Responsive frontend implementation Git/source-code workflows Production deployment Experience integrating an existing React application with WordPress is particularly important. Application Questions Please answer these when applying: 1. Have you implemented an existing React application into or alongside WordPress before? 2. Have you built custom WordPress REST API/plugin/database functionality? 3. Are you comfortable reviewing a large developer handoff package before estimating the implementation? 4. How would you approach keeping React application functionality while using WordPress for editable website content? 5. Can you provide examples of comparable WordPress + React application projects? 6. Are you willing to review the handoff package and provide a scope confirmation, implementation plan, timeline, and fixed-price estimate before development begins? First Milestone — Handoff Review & Implementation Planning The first milestone will be handoff review and technical implementation planning, not immediate page building. The selected developer will review the complete package and provide: Confirmation that the supplied source/build can be opened and reviewed Confirmation of understanding of the existing system Proposed production implementation architecture WordPress/React integration approach Database and API implementation approach Persistence and migration requirements Hosting/server requirements and dependencies Identified dependencies Implementation phases Technical risks Questions/blockers Estimated implementation timeline Final fixed-price quotation for the complete implementation Development will begin only after the implementation plan has been reviewed and approved. Development & Milestone Acceptance Standard The complete implementation will be divided into milestones after the handoff review and implementation plan are approved. Existing approved functionality, data relationships and architecture documented in the supplied Resolve Lighting developer handoff must be preserved unless a change is explicitly approved. A milestone is complete only when its functionality is implemented, tested and demonstrated working. Visual reproduction alone does not constitute completion. Each implementation milestone must therefore be: Implemented → Connected to the correct underlying data → Tested → Demonstrated working → Documented where applicable → Approved Payment for an implementation milestone will be released after the corresponding functionality has been demonstrated and accepted. What We Are Looking For We are looking for a developer who can take ownership of implementing an already-designed system, not someone who needs to redesign the project from scratch. The developer must be comfortable working from existing source code, architecture, structured data, documentation, implementation requirements and visual references rather than treating the project as a conventional WordPress website build. There is potential for ongoing development work after the initial production implementation, as additional functionality and integrations are planned for the platform. When applying, please answer the application questions directly and provide relevant examples of WordPress + React application work. Generic proposals that do not address the technical requirements of this project will not be considered.