Experienced Full-Stack Developer Needed for Custom E-commerce Analytics Platform

PROJECT DESCRIPTION I'm looking for a highly experienced full-stack developer to build a custom analytics platform for our e-commerce business. The goal is to create one central dashboard that combines data from all our Shopify stores, Meta Ads accounts, and Google Ads accounts. We want to have a complete overview of our business performance, advertising results, creative performance, and team productivity in one place. I already have access to an existing dashboard that serves as the reference for what I want to build. I can provide access to the platform, along with screenshots and screen recordings, so you can understand exactly how it works and recreate its functionality. We also have additional features we'd like to implement specifically for our business. I'm looking for someone who can take ownership of the technical development, recommend the right architecture, and deliver a reliable, scalable solution. CORE FEATURES BUSINESS PERFORMANCE DASHBOARD We want a central overview of our entire e-commerce business, including: Revenue across all stores Revenue per individual store Daily, weekly, and monthly performance Advertising spend and ROAS Profit and other important KPIs Store-level comparisons and performance trends ADVERTISING & CREATIVE ANALYTICS We want to automatically collect advertising data from Meta Ads Manager and use it to analyze performance across our campaigns and creatives. Required functionality includes: Creative performance tracking Win rate tracking for creative strategists and team members ROAS and advertising performance per creative Campaign and ad set analytics Identification of winning creatives and advertising angles Historical performance comparisons We want to understand which creatives, angles, products, and team members generate the best results. MULTI-PLATFORM INTEGRATIONS The platform needs to integrate with multiple external services, primarily: Shopify API Meta Marketing API Google Ads API Data should be collected automatically and consolidated into a consistent reporting system. Reliability is extremely important. We need accurate data, stable integrations, proper error handling, and a system that can scale as we add more stores and advertising accounts. RECREATE AN EXISTING DASHBOARD I have access to an existing analytics dashboard that I want to use as the main reference for this project. I can provide access so you can explore the platform, understand its functionality, and estimate the work required to recreate a comparable solution. The objective is to reproduce its core functionality and user experience as closely as possible, with our own branding, integrations, and additional features. STANDALONE APPLICATION I specifically want this built as an independent web application, not as an n8n-based dashboard. The application should have its own frontend, backend, database, and integration infrastructure. I'm open to your recommendations regarding the technology stack, provided the solution is scalable, maintainable, and suitable for a data-intensive application. IDEAL DEVELOPER You should have experience with: Full-stack web development React and TypeScript Node.js or a comparable backend technology REST APIs and third-party integrations Shopify, Meta Marketing API, and Google Ads API PostgreSQL or another suitable database Analytics dashboards and data visualization Data synchronization and backend architecture Previous experience building e-commerce analytics platforms, advertising dashboards, or internal business intelligence tools is a major advantage. PROJECT DETAILS This is a high-priority project, and we'd like to start as soon as possible. I'm looking for a developer who can assess the reference dashboard, identify the technical requirements, and provide a realistic estimate before development begins. Depending on the complexity, we can divide the project into milestones, starting with the core integrations and dashboard before implementing the more advanced analytics features. Please include the following in your proposal: Examples of similar projects you've built Your experience with the required APIs Your recommended technology stack Your estimated development timeline Your estimated total project cost Any technical challenges you anticipate I'm looking for a long-term development partner who can build a reliable foundation and potentially help us expand the platform over time. If this sounds like a good fit, please apply with relevant examples of your work. I'll share the reference dashboard and additional project details with suitable candidates.