I’m looking for a developer to help me build a platform that predicts World Cup match results and refines those predictions with real-time data. The project will involve leveraging AI algorithms, machine learning models, historical match data, player stats, and live performance metrics to create accurate match predictions. The platform will need to continuously update and vet these predictions based on new data as the tournament unfolds. If you're passionate about soccer, AI-driven solutions, and real-time systems, this could be an exciting challenge for you. The role will involve developing a scalable platform using technologies like React, Node.js, and possibly Python for data analysis and machine learning. You'll integrate real-time data through APIs to pull match stats and player performance information. AI will be central to the prediction system, with algorithms that analyze historical trends and live data to improve accuracy. You’ll also create a vetting process to ensure predictions remain sharp and reliable as the tournament progresses. The platform must be able to handle high traffic during live events while offering a seamless user experience. I’m looking for someone with experience in AI-based prediction systems, strong web development skills (React, Node.js), and familiarity with working with APIs for real-time data integration. If you have a background in machine learning, real-time data processing, and sports analytics, that would be a major plus.

Rate: $10/hr | 40 hrs/week | Long-term contract Job Success Score: 90% minimum required Individual developers only — no agencies ⚠️ This is NOT a greenfield build. The app already exists and is in active development. We are looking for a strong, senior React Native developer who can take ownership, write clean production-ready code, and help us get to launch without endless back and forth on PRs. ⛔ No major refactors ⛔ No new features unless explicitly approved ⛔ No “I rewrote everything” approaches About GoShopBlack: GoShopBlack is a marketplace mobile app that connects users with Black-owned businesses. The app is built in React Native with a Supabase backend and has draft builds on both Google Play and the Apple App Store. I do regular code reviews via GitHub and expect PRs to be tested, clean, and production-ready before submission. This is a serious long-term role — not a one-off project. Hours can increase for the right developer. What You'll Be Working On: - Ongoing React Native development for iOS & Android - Search and filter system by location, category, and business type - Google Maps API integration (not yet built — this is a key upcoming feature) - Business profiles (hours, contact info, website links, reviews) - Customer ratings and review system - Business submission and admin approval flow - E-commerce integration for businesses that sell online - Social login (Facebook & Gmail) plus email/password auth - Phase 2: push notifications, in-app messaging, ad integration, AI recommendations What I'm Looking For: - Senior-level React Native experience — you must show me apps you have shipped to the App Store and Google Play - Strong Supabase experience — this is our backend, no Firebase or AWS - Google Maps API integration experience - GitHub proficiency — include your GitHub profile in your proposal - Job Success Score of 90% or higher - Clean, well-structured code with no demo or test code in PRs - Someone who self-tests thoroughly and does full end-to-end testing before submitting a PR - Strong communicator who gives daily updates and flags issues early - Weekly proof of progress required (Git commits, test builds, or screen recordings) - Must be comfortable with Hubstaff time tracking from day one - Must be willing to sign an NDA and contract before starting Deliverables • Business profiles with operating hours, contact info, links, and gallery • Google Maps API integration for directions • Customer rating & review system • Business submission (enable businesses to submit details for approval) • UI/UX polish: clean, modern, mobile-optimized interface • App Store deployment: finalize builds & publish to Google Play & Apple App Store • • Future Enhancements (Phase 2 – Optional): • Membership/subscription for premium business listings • Push notifications for promotions and new listings • In-app messaging/chat • In-app transactions for e-commerce listings • AI-powered recommendations • Social/community features • • Requirements: • Fluent in English (speaking & writing) • Proven experience in Flutter (React Native also considered) • Backend experience with Supabase / Firebase / Node.js • Strong Google Maps API integration experience • Experience publishing apps on Google Play & Apple App Store • Strong UI/UX design sense • Ability to provide weekly proof of progress (commits, test builds, or demos) • Willingness to sign an NDA and contract • • How to Apply: • Please start your proposal with the word Love (to confirm you read the full post). • • Include: • Examples of previous apps you’ve developed (especially directories, e-commerce, or review systems) • A short outline of how you would approach reviewing and completing this project. • • Confirmation that you can commit to $1,600/month on weekly milestones.

Deploy existing React app to Netlify. 1-2 hour job . I have a complete React web application already built and need help deploying it to Netlify. This is a simple deployment job, no coding required. Whats Needed: Take my existing React app (zip file provided), Push the code to GitHub, Connect GitHub to Netlify, Fix any build errors, Verify the site loads at ascendstocks.com Already done: Netlify account set up , domain ascendstocks.com registered already, all environment variables already configured in Netlify, Supabase database already created and running, Tech stack: React, netlify, Supabase, Clerk Auth, Timeline as soon as possible.

Full-Stack Developer Needed to Build Production-Ready Budget-Focused Meal Planning Web Application Project Overview I am building a consumer web application focused on helping users create affordable meal plans and shopping lists while staying within a grocery budget. The project has progressed beyond the concept stage and currently includes: * Validated prototype * Product requirements documentation * GitHub repository * Supabase environment * Frontend application foundation I am seeking an experienced full-stack developer to help transform the existing foundation into a production-ready MVP. This is a contract opportunity with potential for future work following a successful launch. Scope of Work The selected developer will help: * Review and improve the existing codebase * Implement production-ready frontend and backend functionality * Design and optimize database relationships * Build user authentication and account management * Implement core application workflows * Prepare the application for deployment * Create maintainable technical documentation Technology Stack Current environment includes: * React-based frontend * Supabase * PostgreSQL * GitHub * Modern web application architecture Developers may recommend improvements if justified. Required Experience Required: * Full-stack web application development * React * JavaScript / TypeScript * Node.js * PostgreSQL * REST API integration * GitHub workflow experience Preferred: * Supabase experience * AI-powered application experience * Startup MVP experience * Experience improving existing applications Deliverables * Production-ready MVP * Clean and maintainable code * User authentication * Core application functionality * Deployment support * Technical documentation Timeline Target MVP completion: 6–10 weeks NDA & Ownership A standard NDA and work-for-hire agreement will be required prior to sharing detailed specifications and prior to project start. All work product, code, documentation, and intellectual property created as part of this engagement will be owned by the client. Budget & Proposal Requirements As an early-stage startup founder, I am operating with a limited development budget and am looking for the most cost-effective path to launch. When submitting a proposal, please include: 1. Estimated total project cost 2. Estimated timeline 3. Recommended development approach 4. Opportunities to reduce development cost while maintaining quality 5. Which items you would prioritize for Version 1 6. Which items you would recommend postponing until a later release Please provide specific recommendations rather than generic proposals. To Apply Please include: 1. Links to relevant projects 2. Experience with React and Supabase 3. Experience building consumer-facing web applications 4. Experience productionizing prototypes or existing applications 5. Your answer to the following question: "If this were your own startup and your own money, how would you build the MVP as cost-effectively as possible?" Please begin your proposal with the word "StretchBites" so I know you have read the entire posting.

I’m looking for an experienced Full-Stack Web Developer to help build and improve a business website while adding interactive mapping functionality. The ideal candidate should be comfortable with both front-end and back-end development and have experience integrating map-based tools into websites. What I’m Looking For: * Website design and development * Mobile-responsive layouts * Fast-loading, modern user experience * Lead capture forms * Database integration * Interactive maps * Territory or area selection tools * Location-based functionality * API integrations * Ongoing improvements and feature development Preferred Skills: * React, Next.js, or similar frameworks * Node.js or other back-end technologies * Database management * Google Maps API, Mapbox, or similar mapping platforms * UI/UX design experience * Strong problem-solving skills

Job Description: We are looking for a skilled, "under-the-hood" Full-Stack Developer to help build out Lafayette Academy’s online portal. We have clear visual layouts, a working offline prototype, and a live front-end dashboard currently hosted on Vercel. We use AI heavily in our workflow for strategy, logic, and rapid drafting. However, we do not want an AI-only prompt engineer. We need a traditional, foundational developer who understands actual code architecture, databases, and deployment systems. If the AI generates a buggy script, you must have the depth of knowledge to debug it manually and make it work. What You Will Do: Take existing static mockups (HTML/CSS/Next.js components) and integrate them into our live Vercel environment, OR help create new mockups if the ones we have need to be upgraded. Connect user interfaces to a secure database (like Supabase or Firebase) to handle real-time student data. Help bridge our frontend to API endpoints (like OpenAI) to power our live "Personalization Cues" for instructors. Troubleshoot, debug, and optimize existing code when automated tools hit a wall. Our Tech Stack Focus: React / Next.js Vercel Hosting Tailwind CSS Database integration (SQL/Supabase/Firebase) To Apply: Please start your proposal with the words "Under the Hood." This proves you read the description. Tell us briefly about a time you had to manually fix a complex database or code glitch that automated tools couldn't solve.

US-BASED CONTRACT FULL-STACK / AI ENGINEER FOR HEALTHCARE PRODUCT Remote, US-Based Contractor | East Coast Time Required | Home Health AI Product About Scribble Scribble is the top-rated AI platform for home health purpose-built to give clinicians their time back. Home health agencies run on documentation: visit notes, care plans, prior authorizations, compliance paperwork - we help automate these processes. Project Overview We are looking for one or more experienced US-based contractors to help us move faster across several important areas of our product. We need hands-on builders who can scope clearly defined product needs, ask the right questions, and independently deliver high-quality work. This is not a narrow ticket-taking role. We are looking for people who can own meaningful pieces of the product, communicate clearly, work asynchronously, and make steady progress without heavy day-to-day management. Depending on your strengths, the work may focus on mobile, backend, AI workflows, and EMR robotic process automation. You will ideally own end to end development including testing. What We Need Help With • Build and improve visit types and clinical documentation workflows for home health use cases • Improve accuracy of AI-generated outputs, including prompt design, evaluation, testing, and workflow refinements • Integrate completed visits and documentation into EMR systems using APIs where available and robotic process automation where needed • Work across React Native mobile app features, Node.js backend services, OpenAI/LLM workflows, and automated testing • Debug production issues, improve reliability, and help us ship quickly without sacrificing quality • Troubleshoot and fix bugs quickly, and make product improvements based on customer feedback • Translate product requirements into practical technical plans and independently execute against them • Document decisions, provide frequent updates, and proactively flag risks, blockers, and trade-offs • Potentially collaborate with team members across different parts of the roadmap Skills We Are Looking For Required • Advanced use of Claude Code • US-based contractor with East Coast time zone availability required • Strong experience with React Native mobile development • Backend experience with Node.js, APIs, databases, authentication, and production debugging • Hands-on experience with OpenAI or other LLM APIs, prompt engineering, structured outputs, and AI workflow testing • Strong testing mindset, including unit tests, integration tests, regression testing, and quality checks for AI outputs • Ability to work independently from a product goal, break it into technical tasks, and deliver without constant direction • Excellent written and verbal communication; concise updates, clear questions, and proactive status reporting are essential • Speed and quality are both must-haves: we need someone who can move quickly while still shipping reliable, well-tested work • Comfortable working with sensitive healthcare data and following HIPAA-aware, security-conscious development practices Strongly Preferred • Meaningful healthcare experience is strongly preferred, especially in home health, clinical documentation, EMR/EHR workflows, HIPAA-aware development, or regulated healthcare environments Contract Details • Contract role for a US-based independent contractor • US-based candidates only; East Coast time zone availability is required • Part-time or project-based to start, with potential for ongoing work • Minimum availability of 20 hours per week is required • We may hire multiple contractors based on specialty, fit, and availability • Clear deliverables, frequent communication, and fast iteration cycles • Hourly rate or fixed-price milestones can be discussed based on scope and experience • Selected contractors will need to sign appropriate IP assignment, NDA, and Business Associate Agreement documents before accessing sensitive product or healthcare data • We may request and check references before starting a larger engagement

Seeking a senior React Native engineer to improve performance of our eCommerce application containing 20,000+ machine parts. Current issues include: - Slow product list rendering - Search delays - Lag during scrolling - Occasional screen freezes - High memory consumption - Long initial app load times Tasks: - Analyze performance bottlenecks - Optimize FlatList and pagination - Improve API data handling - Optimize Redux state management - Reduce unnecessary component re-renders - Improve image loading performance This is a performance-focused project rather than new feature development. Required Experience: - React Native - TypeScript - React Profiler - Flipper - Redux Toolkit - Mobile app optimization

I have a production-ready React/TypeScript health record web application built with Lovable (AI app builder) that needs to be migrated to professional infrastructure I own before public launch. I also need Claude Code (Anthropic's AI coding CLI) set up so I can continue building features independently after migration without relying on Lovable. This is a one-time migration project with a clear scope and a complete data export already prepared. I need someone experienced, detail-oriented, and trustworthy — this is a health application handling sensitive patient data. What I already have: Vercel Pro account — ready to connect Supabase account — ready to create new project GitHub repository — connected and available Domain: fullycharted.app — DNS access available Complete bulk export ZIP from Lovable Cloud — all tables as CSV/JSON, all storage files, complete supabase/migrations/ folder 2 beta users currently — minimal data to migrate Mac computer for local development setup The application: React/TypeScript frontend with Vite and TailwindCSS Supabase backend — PostgreSQL, Row Level Security, Edge Functions, Storage buckets Supabase Auth for authentication 1,326 automated tests passing Currently hosted on Lovable Cloud fullycharted.app currently points to a separate landing page — needs to point to the full app after migration What I need done: Connect GitHub to my Vercel account and configure build settings for Vite/React and all environment variables Create new Supabase project in my account — run supabase db push using migrations folder, import all table data from CSV/JSON export, re-upload all storage files (lab documents, imaging, diagnostic studies), verify all Row Level Security policies working correctly Configure all environment variables — VITE_SUPABASE_URL, VITE_SUPABASE_PUBLISHABLE_KEY, VITE_ADMIN_EMAIL, and any others currently in Lovable DNS configuration — point fullycharted.app to Vercel, configure www redirect, verify SSL certificate Handle 2 beta user accounts — coordinate password reset timing before DNS cutover Full verification — app loads at fullycharted.app, login works, patient data intact, emergency view works without auth, file uploads work, admin route gated correctly, all 1,326 automated tests pass, RLS verified (no cross-account data access) Claude Code setup on my Mac — install Node.js, install Claude Code CLI, clone repository locally, configure local environment variables, verify app runs locally (npm run dev) and tests pass (npm test), walk me through one simple change so I understand the workflow Documentation and handoff — all environment variables documented, Vercel and Supabase configuration documented, local development workflow documented, GitHub push triggers Vercel deployment confirmed Security requirements: This is a health application. RLS policies must be verified after migration. Patients must only access their own data. Admin route gated to one specific email. Public emergency routes work without exposing other patient data. What I will provide: Access to my Vercel account Access to my Supabase account Complete bulk export ZIP GitHub repository access Domain registrar access for DNS Anthropic API key for Claude Code Quick responses throughout the project Success looks like: fullycharted.app loads the full application Beta users can reset password and log in with all data intact All 1,326 tests passing I own all infrastructure completely Claude Code installed, configured, working Complete documentation in my hands Follow-on work: I have a second application (MySynapse — homeschool platform) on the same stack needing the same migration in 1-2 months. Strong performance here leads to that second project directly. To apply please include: Examples of similar Lovable/managed platform to Vercel migrations Supabase RLS and migration experience Your approach to data integrity verification Confirmation you are comfortable with health app security requirements

We are a medically backed, pre-seed healthtech platform preparing for an immediate enterprise pilot deployment. Our core user interface, interactive data features, and content architecture are functionally built utilizing modern AI-assisted development tools. We are seeking a senior, hands-on engineer with specific healthtech deployment experience to serve as our Execution Contractor for an immediate hardening sprint. You will own the backend security architecture, external cloud infrastructure configuration, and technical compliance validation required to transition our high-fidelity MVP into a secure production environment. What You’ll Do Harden Backend Security: Transition frontend route guards into strict, server-side authentication and authorization boundaries across all data-access paths. Architect Secure Infrastructure: Migrate core data architectures out of staging environments and securely provision an external, HIPAA-compliant cloud database tier. Manage Vendor & Compliance Workflows: Audit our technical vendor stack to securely embed enterprise API protocols, ensuring strict data handling and compliance alignment across all integrated platforms. Validate & Sign-Off: Run edge-case testing and performance audits to completely secure data handling pipelines, delivering a technical go/no-go sign-off for our upcoming pilot cohort. The Technical Stack Frontend: React 18+, TypeScript Backend: Node.js, Express.js Database/ORM: PostgreSQL via Drizzle ORM Environment/Tooling: WebSockets, Enterprise AI APIs, Secure Cloud Infrastructure (AWS / Supabase) Who You Are A seasoned full-stack or backend engineer with a proven track record of successfully deploying applications into live clinical, medical, or heavily regulated environments. Deeply knowledgeable in server-side encryption, data pseudonymization, and secure cloud networking. Highly comfortable inheriting, auditing, and optimizing architectures built alongside AI-assisted development workflows. An execution-focused builder who thrives in high-velocity sprints and values absolute production discipline. To Apply: Please submit your proposal directly through Upwork with a brief summary of your healthtech deployment experience, specifically highlighting your experience with secure data pipelines, PostgreSQL, and HIPAA configurations.