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Posted 3 weeks ago
  • Hourly: $40.00 - $50.00
  • Expert
  • Est. time: More than 6 months, Less than 30 hrs/week

We’re looking for an experienced full-stack React / React Native developer to help maintain and grow our B2B SaaS platform. Yelli is a web and mobile platform used by restaurants and hospitality businesses for training, onboarding, communication, testing, and operational documentation. The platform is already live with paying customers, and we are currently focused on improving the product, shipping new features, and scaling the platform. This is not a greenfield project. You'll be stepping into an existing codebase and working directly with the founder to improve, maintain, and evolve the product. Tech Stack: - Node.js - TypeScript - React - React Native - MySQL - AWS (EC2, S3, CodeDeploy) - Firebase - GitLab CI/CD What You'll Be Doing: - Maintaining and improving an existing web and mobile application - Fixing bugs and troubleshooting production issues - Shipping new features and enhancements - Reviewing existing architecture and suggesting improvements - Participating in weekly planning and progress meetings - Communicating progress and blockers proactively - Taking ownership of assigned projects from start to finish What We're Looking For: - 5+ years of professional full-stack development experience - Strong experience with React and React Native - Strong Node.js and TypeScript experience - Experience working with AWS-hosted applications - Experience with MySQL and relational database design - Comfortable working within an existing codebase - Strong debugging and problem-solving skills - Excellent written and verbal English communication - Reliable, responsive, and self-directed Bonus Points - SaaS startup experience - Hospitality or restaurant technology experience - UI/UX experience - Experience leading projects or mentoring developers - DevOps or infrastructure experience !!Important!! Communication is extremely important for this role. We are looking for someone who can communicate clearly, participate in weekly video meetings, explain technical decisions in plain English, and provide consistent updates on progress and blockers. Engagement Details: - Part-time freelance to start - Approximately 10–20 hours per week - Long-term opportunity for the right person - Direct relationship with the company (no agencies or subcontracting) When applying, please include: - A brief summary of your React Native experience - A SaaS product you've worked on that is currently live - Your availability (hours per week) - Your hourly rate - Why you think you'd be a good fit for this role Please do not use AI-generated proposals. We are looking for thoughtful, personalized responses that demonstrate relevant experience.

  • Hourly: $8.00 - $10.00
  • Expert
  • Est. time: 1 to 3 months, 30+ hrs/week

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.

  • Fixed price
  • Expert
  • Est. budget: $5,000.00

React Native Developer Needed — Healthcare Dating App (StatDate) I'm a Registered Nurse with 13 years of ICU and PACU experience building StatDate — a dating app exclusively for verified healthcare professionals and EMS personnel. Think Tinder, but every user is checked against a national license database before they can interact with anyone. No impostors. No civilians. The concept is validated, the brand is built, the domain is live (statdate.com), and a full interactive prototype exists. I have a complete 40-page technical specification ready to hand off on day one. I need a developer to build the real thing. WHAT YOU ARE BUILDING - React Native app (Expo) — iOS and Android from a single codebase - Credential verification — integrates with Nursys, NPI Registry, and NREMT APIs - Swipe-based discovery feed with schedule-compatibility scoring algorithm - Real-time messaging with photo sharing - Subscription paywall — RevenueCat (mobile) + Stripe (web) - Report and block system — required for App Store approval - Node.js + PostgreSQL backend deployed on Railway - Admin dashboard for report queue and manual verification override SUBSCRIPTION TIERS - Free — swipe only, blurred likes count - On-Call ($9.99/mo) — messaging, schedule filter, full likes list, rewind - Rapid Response ($19.99/mo) — priority placement, boost, read receipts REQUIRED SKILLS — DO NOT APPLY WITHOUT THESE - React Native (Expo) — must have a live app currently in the App Store or Google Play - Node.js + Express — REST API design and implementation - PostgreSQL — schema design, migrations, query optimization - RevenueCat or Stripe — prior subscription integration required - AWS S3 or Supabase Storage — file upload experience - Real-time messaging — Socket.io or Supabase Realtime - Third-party API integration — external REST APIs with error handling NICE TO HAVE - Dating or marketplace app experience - Supabase Auth experience - App Store submission experience (Apple + Google) WHAT I PROVIDE - Complete 40-page technical specification with schema, API endpoints, screen inventory, and feature logic - Full interactive HTML prototype for UI/UX reference - Brand assets — logo, color palette, typography - Daily async availability for feedback and approvals TO APPLY — INCLUDE ALL OF THE FOLLOWING OR I WILL NOT RESPOND 1. Link to a live app you built currently in the App Store or Google Play 2. Your approach to the three license verification APIs (Nursys, NPI Registry, NREMT) 3. How you would architect real-time messaging for this app 4. Your estimated timeline 5. Your bid I will respond to qualified applicants within 48 hours.

  • Fixed price
  • Expert
  • Est. budget: $2,000.00

Peachtree Care Health Services (PCHS) is seeking an experienced mobile app developer to update an existing iOS and Android application currently published in the Apple App Store and Google Play Store. Scope: Update existing app screens and workflows Improve UI/UX Fix bugs and compatibility issues Publish updates to Apple App Store and Google Play Review backend/API integrations Preferred Skills: React Native, Flutter, Swift, Kotlin, or existing app framework Experience with healthcare apps App Store and Google Play deployment experience Atlanta-based developer preferred Project Type: Freelance / Contract Potential for ongoing maintenance work Please provide: Portfolio links Similar apps you have worked on Hourly rate or project estimate Preference: Atlanta-area candidates

  • Fixed price
  • Expert
  • Est. budget: $1,500.00

*NO AGENCIES, Single Engineers Only* SeatWaves is a live ticket resale platform with a fully operational web version, complete Broker API, and TicketMaster API integration already in production. We are looking for a skilled mobile developer to finish the final leg of our iOS and Android app — not start from scratch. The previous development team completed approximately 88% of the mobile frontend UI. The Figma designs are finalized. The backend APIs are live. What we need now is someone to come in, understand the existing codebase quickly, wire everything together, and deliver a production-ready app. What's Already Done → Live web platform (full-featured, production-ready) → Broker API — fully built and operational → TicketMaster API — fully integrated → Figma UI/UX designs for iOS and Android — finalized and approved → iOS & Android frontend — ~88% complete (UI built, needs backend wiring) What Needs to Be Completed → Wire existing mobile frontend to live backend APIs (authentication, listings, checkout flows, broker inventory) → Integrate TicketNetwork API — inventory feed and seat availability → Implement interactive seat map API integration → Bot protection and rate limiting hardened for high-traffic onsale events → Queue integrity and load-resilience architecture for peak traffic → End-to-end QA testing on iOS and Android → Store-ready builds (App Store + Google Play submission prep) Why $1,500? We want to be transparent about the budget and why we feel it's fair for the right developer. The heavy lifting has already been done. The UI is built. The APIs exist. The designs are approved. This engagement is scoped specifically around integration, security hardening, and QA — not ground-up development. We estimate 3–5 weeks of focused work for an experienced React Native or Flutter developer who can hit the ground running. We are not paying for a full build — we are paying for a sharp finisher who can take 88% to 100% efficiently and cleanly. We're offering $1,500 fixed price for a clearly scoped, well-documented completion sprint. Applicants who try to reprice this into a full rebuild will not be considered. Who We're Looking For → Strong experience with React Native or Flutter (please specify) → Proven ability to inherit and work within existing codebases → Experience integrating third-party APIs (ticketing, payments, or marketplace preferred) → Familiarity with security best practices for high-traffic consumer apps → Clear communicator — we need daily async updates and weekly check-ins → Portfolio or GitHub showing mobile apps you've shipped, not just started To be considered, please include the following in your proposal: 1. A brief overview of a similar project you've completed (inherited codebase or API integration work preferred) 2. Your estimated timeline to complete the remaining scope 3. Your preferred framework (React Native or Flutter) and why 4. Any questions you have about the existing stack Generic proposals will be declined. We're looking for someone who has read this carefully and can speak specifically to the work at hand. READY TO FINISH SOMETHING REAL? The foundation is built. The designs are done. The APIs are live. We need a finisher — someone who delivers, not someone who starts over.

  • Hourly: $20.00 - $25.00
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

We are seeking an experienced mobile app developer to create a fully functional MVP that combines social features with an AI chat component. The app should be clean, stable, scalable, and ready for early user adoption, not just a clickable demo. Specific details about the app’s concept and logic will be shared under NDA. This project has a clear roadmap and strong vision for launch, and we’re looking for a thoughtful, skilled developer who can help architect and build a production-ready product with strong user experience, reliability, and performance. Complete UI/UX designs and flows have already been created in Figma, so this role is focused primarily on development, backend architecture, integrations, and implementation rather than design. Preference will be given to developers located in the DC, Maryland, or Virginia (DMV) area for easier collaboration and communication throughout the project, and occasional in-person meetings if needed. Deliverables & Requirements • Develop a cross-platform mobile app using Flutter or React Native • Build secure user authentication, profiles, friend systems, and group chat functionality • Integrate AI chat features via API with moderation and safeguard controls to prevent misuse • Implement reliable push notifications and time-sensitive user interactions across iOS • Set up scalable backend architecture and database infrastructure • Translate existing Figma designs into a polished, responsive mobile application • Conduct testing, debugging, and QA to ensure app stability and performance • Experience with Firebase, Supabase, WebSockets, or similar real-time technologies preferred • Deliver a functional app ready for deployment to the App Store

  • Fixed price
  • Expert
  • Est. budget: $10,000.00

I’m building Elevyn, a platform designed to help people better understand themselves through connected data, intentional reflection, and AI-generated insights. This is not a social media platform. This is not a productivity app. This is not just another trading journal. Elevyn is an operating system for self-mastery, with trading serving as the first environment where personal growth becomes measurable. Most apps collect data. Elevyn is designed to observe. The goal is to connect information across different areas of a person’s life and uncover meaningful patterns that help them improve their decision-making, habits, discipline, and overall performance. The Vision Users will log information such as: • Sleep • Mood • Daily reflections • Workouts • Morning routines • Trading activity • Goals • Habits • Personal notes Instead of simply displaying this data, Elevyn will analyze relationships between it and surface meaningful insights. Examples include: • “You slept less than 5 hours before 7 of your last 10 losing trades.” • “Your win rate increases after completing your morning routine.” • “You tend to become more impulsive after multiple winning days.” • “Your consistency improves when workouts and journaling happen on the same day.” The long-term vision is an intelligent system that continuously helps users become more self-aware. Current Stage I already have: • Brand identity • Vision and philosophy • User flows • Interactive prototype • Core feature planning • Long-term roadmap I’m now looking for a developer or small team (2-3 people) to build the first production version. What I’m Looking For I’m looking for someone who can think beyond simply building screens. I want someone who can: • Build scalable architecture • Recommend the best technologies • Think through user experience • Ask thoughtful questions • Help solve technical challenges • Build for future AI integrations • Create clean, maintainable code Experience with AI, analytics, mobile applications, and scalable backend systems is a significant advantage. Technology (Open to Recommendations) I’m open to your recommendations, but I’m considering: • Flutter or React Native • Node.js or Python backend • PostgreSQL • Firebase/Supabase • AWS • AI integrations (OpenAI or similar) • Secure authentication and cloud infrastructure Long-Term Vision Trading is only the beginning. The underlying engine should eventually support entrepreneurs, athletes, creators, students, and anyone pursuing mastery in a specific area of life. The core idea remains the same: Help people understand themselves by connecting patterns across their behaviors, decisions, and outcomes. Who I’m Looking For I’m looking for someone who believes in building meaningful products—not just completing tasks. If you’re excited about creating a platform that combines psychology, data, AI, and personal development into something people genuinely use to improve their lives, I’d love to hear from you. Please include examples of similar work, your recommended tech stack, and how you would approach building a scalable MVP that can grow over time.

  • Hourly: $20.00 - $30.00
  • Entry Level
  • Est. time: 3 to 6 months, Less than 30 hrs/week

COREX MVP Native-feeling iOS and Android app (using a cross-platform framework like Flutter or React Native) User login and profiles COREX onboarding assessment (goals, experience, injuries) AI-generated 15-minute rotational workouts Exercise library with videos and instructions Workout timer and progress tracking Basic AI chat coach for workout and recovery questions Subscription/payment integration Admin portal to add or update workouts and content Save for Version 2 These are valuable, but they can wait: Camera-based form analysis Wearable integrations Advanced nutrition planning Community features Leaderboards and challenges Franchise/business dashboards Live trainer messaging Upwork budget suggestion UX/UI design App development AI integration Testing App Store and Google Play launch That gives you control over quality and payments. One thing I’d add Rather than describing it as just another fitness app, position COREX as a specialized AI rotational training platform. That’s what makes it stand out. For example: “COREX is an AI-powered rotational fitness platform that delivers personalized 15-minute workouts designed to improve core strength, mobility, stability, athletic performance, and functional movement through our proprietary rotational training methodology.” That description is much more distinctive than “fitness app.” My recommendation If I were helping you build this, I’d focus on creating something impressive enough to demonstrate to investors, gym owners, and potential partners—not every feature you eventually want. A polished MVP that users enjoy is often more valuable than a feature-heavy app that’s unfinished. I also think your app could have a clear advantage if it emphasizes the science of rotational training rather than trying to compete with broad fitness apps. That gives COREX a unique identity from day one. The product and program itself is trademarked and patent pending

  • Hourly: $45.00 - $70.00
  • Intermediate
  • Est. time: 1 to 3 months, 30+ hrs/week

I’m building the final UX surfaces for a July 1 SaaS launch and need a fast, reliable React + Supabase engineer who can execute clean, production‑ready screens and flows. The project is front‑end heavy, well‑defined, and focused on UI polish, dashboards, forms, and simple Supabase integrations. You’ll work directly with me (the founder) in a clear, async workflow with daily check‑ins. I move quickly, communicate clearly, and provide detailed requirements for each screen or flow. What I need built Dashboard_flows - user dashboards, scoring views, operator tools UX_surfaces - responsive screens using React, TypeScript, Tailwind Form_and_flow_logic - multi‑step flows, validation, state handling Supabase_integration - basic CRUD, auth, RLS‑safe queries Admin tools - simple internal views for data visibility UI polish - spacing, alignment, loading/error states Stripe_integration - light subscription or billing touchpoints This is not deep backend work. It’s clean, fast UI execution. How I work Clear requirements - I provide detailed specs for each screen Async- updates - daily check‑ins, async communication Fast iteration - I respond quickly and unblock immediately Direct founder access - no layers, no bureaucracy What I’m looking for React Typescript experience Tailwind UI polish Supabase familiarity Stripe comfort Clean communication US based Timeline & budget Start today 2 to 3 week contract 45 to 70 hr Potential ongoing work If you can start immediately and have examples of polished React/Tailwind work, I’d love to see your GitHub or recent projects.

  • Fixed price
  • Intermediate
  • Est. budget: $200.00

**Job Description:** We're looking for a frontend developer to recreate the design of a single-page website using **React** and **JavaScript**. The UI/UX design has already been completed—you'll simply be translating the existing design into clean, responsive, and maintainable code. ### Responsibilities * Convert an existing one-page website design into a React application. * Ensure the page is responsive across desktop and mobile devices. * Write clean, well-organized, and reusable React/JavaScript code. * Match the provided design as closely as possible. ### Requirements * Experience with React and modern JavaScript (ES6+). * Strong HTML and CSS skills. * Ability to accurately recreate designs from mockups. * Attention to detail and responsive design best practices. ### Future Opportunities If we're happy with the work, there may be opportunities for additional frontend development projects in the future. These would be separate, paid engagements involving new components and features.

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