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  • 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.

  • Hourly: $30.00 - $40.00
  • Expert
  • Est. time: More than 6 months, Less than 30 hrs/week

We are seeking a Mid to Senior-level Fullstack Developer (3–5 years of experience) to not only maintain and expand our platform (Next.js frontend + Django backend) but also guide us in fully integrating AI-powered coding assistance across the full stack. The frontend is already set up for AI-assisted editing (e.g. Cursor), and we want to evolve our backend similarly. The ideal candidate will help us transition the entire development environment, so both we and the developer can leverage state-of-the-art AI coding tools. Beyond coding, you’ll act as a mentor, helping us better understand the backend’s architecture and workflows while integrating AI-driven development tools into our process. You’ll have a key role in making our stack both stable and future-ready, with AI-assisted flexibility. The Context Our frontend was recently ported to Next.js in an ad-hoc manner, leaving certain sections in need of refactoring and stabilization. We have committed to keeping our backend in Django to leverage its robust processing capabilities. You will be the point person for bridging these two environments. Key Responsibilities -Maintenance & Stability: Perform routine maintenance and optimization across the full stack. -Bug Fixing: Identify and resolve issues within the existing Next.js frontend and Django backend. -System Reliability: Provide technical support and troubleshooting during system downtime. -Feature Implementation: Build and deploy new features, ensuring seamless integration between the AI pipeline and the user interface. Required Technical Profile -3–5 years of professional fullstack experience. -Frontend: Proficiency in Next.js and React; experience cleaning up/refactoring "messy" or legacy codebases is a plus. -Backend: Strong experience with Django (Python), specifically working with complex data pipelines or API integrations. -Mindset: A pragmatic approach to coding—balancing the need for new features with the necessity of technical debt reduction.

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

We’re looking for an experienced Full-Stack Developer to build and refine a modern, responsive web application. You should be comfortable owning both the front end and back end, working independently, and turning clear requirements into a polished, reliable product. What You’ll Do Build and maintain the web application from front end to back end Create a clean, fast, mobile-responsive UI Develop backend functionality, APIs, and database integrations Implement user authentication and account functionality Integrate third-party APIs/services as needed Test, debug, and optimize performance Deploy and maintain the production application What We’re Looking For Strong full-stack web development experience Excellent JavaScript/TypeScript skills Experience with modern frameworks such as React/Next.js Strong backend and database experience Experience with APIs, authentication, cloud deployment, and Git Ability to write clean, scalable, well-documented code Strong communication and ability to work independently Important: We want a developer who can think through problems and recommend solutions—not someone who simply waits for step-by-step instructions. When applying, please send 2–3 examples of web apps you personally built, briefly explain your role in each, and include your availability and hourly rate.

  • Hourly: $50.00 - $90.00
  • Intermediate
  • Est. time: 1 to 3 months, Less than 30 hrs/week

We run a live web platform used daily by dental clinics to manage their front desk — capturing leads, booking consults, and handling patient records. The engineering underneath is solid; what it needs now is a front-end that feels effortless. That is your job. This is a taste role, not an hours role. We are looking for a US-based senior product engineer who knows what an American professional user expects, has genuine UX judgment, and can ship high-quality interfaces fast using modern AI tooling. You will own the entire look and feel of the product as we scale toward a multi-clinic US rollout. WHAT YOU'LL OWN - The full front-end / UX layer: information architecture, layout, hierarchy, scannability, component consistency, and interaction. - Making the complex feel simple — a busy staffer should open the app and instantly know what to do next. Benchmark against the leading commercial platforms and beat them on usability. - Shipping fast with AI tooling (Cursor / Claude / v0 / Copilot) without leaving behind unmaintainable code. - A clean handoff with the backend team: you consume typed data and server actions; you never touch the database directly. - Iterating on a live product against real user feedback, week over week. THE STACK (matters for fit) Next.js App Router (monorepo, pnpm) on Vercel, TypeScript (strict), Tailwind + shadcn/ui, React server and client components, server actions, Clerk auth, Drizzle/Postgres behind a typed service layer. You own the UI/presentation layer; an offshore team owns the data, services, and integrations. The front/back boundary is already clean and type-enforced. MUST-HAVES - US-based, senior, with a portfolio of genuinely intuitive product UI (SaaS / dashboards / internal tools — not marketing sites). - Strong Next.js App Router specifically — server vs client components, server actions, working inside a TypeScript monorepo. This is NOT a classic React SPA + REST role. - Strong TypeScript and Tailwind (shadcn/ui a plus); ships production-grade, maintainable code. - Real product/UX taste — you can take something clunky and make it feel effortless, and explain why it is better. - Fluent with AI-assisted development and a point of view on using it well (speed without slop). - Native US-user sensibility and self-direction — you can own a lane with light oversight. NICE-TO-HAVES - Healthcare / practice-management / booking / scheduling / HIPAA-aware experience. - Design-system / component-library discipline; Figma-to-code fluency. - Startup / 0-to-1 speed. ENGAGEMENT Ongoing, long-term contract. Part-time and capped hours (roughly 15–25 hrs/week to start) with a minimum weekly commitment so availability is reliable. We are deliberately trading fewer hours of a strong senior engineer for taste and speed. TO APPLY, PLEASE ANSWER 1. Link 1–2 products where you owned the front-end/UX. Point to something you made dramatically more intuitive and explain the thinking. 2. How do you use AI coding tools in your workflow, and how do you keep AI-generated UI maintainable at scale? 3. Describe a before/after where you took something complex and made it feel simple. 4. Your US timezone, weekly availability, and hourly rate.

  • Fixed price
  • Intermediate
  • Est. budget: $500.00

I am building an AI automation system for roofing companies and need an experienced developer to help build the first version. The system will help roofing companies: - Capture and qualify leads automatically - Follow up with missed calls/texts - Schedule appointments - Use AI chat/voice automation - Track leads in a simple dashboard/CRM I already have the business model and sales strategy. I need a developer who can help turn the idea into a working product. Requirements: - Experience with AI automation - Experience with APIs (OpenAI, Twilio, etc.) - Experience building web applications - Ability to create clean, scalable systems - Good communication Preferred skills: - React/Next.js - Node.js - Python - Database experience - AI agent development I am looking for someone who could potentially become a long-term development partner as this grows. Please include: 1. Examples of AI systems you have built 2. Your preferred tech stack 3. How you would approach building this system 4. Your estimated timeline

  • Hourly
  • Expert
  • Est. time: More than 6 months, 30+ hrs/week

Project: web platform bringing together people business and capital Engagement: can be hourly or fixed‑price for MVP build, via Upwork Location: DFW area of Texas, US. Scope of Work (initial/brief): design technical architecture for a web app (front‑end, back‑end, database, basic admin tools). Implement core MVP features: user registration/login, profile creation and editing, search/filter UI, connection requests etc. Set up hosting/deployment, security best practices, and a structure that can scale to more users and features over time. Periodically provide documentation and a maintainable codebase that supports future iterations. Tech Stack (flexible): Front‑end: React, Vue, or similar modern JS framework. Back‑end: Node.js, Python (Django/FastAPI), or similar. Database: PostgreSQL or other relational DB. Hosting: AWS, GCP, Azure, or comparable cloud provider. Compensation & Requirements: business plan, monetization strategy, and legal structure will be shared once we have mutual interest and an NDA in place. Equity and partnership terms will be discussed after NDA is signed and subject to a separate written agreement.

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

We are looking for an experienced senior full-stack developer to take over an existing mobile application that is approximately 90% complete. The mobile app is already built, and we now need an experienced developer to bring it across the finish line by fixing bugs, completing the remaining features, optimizing performance, and preparing it for production. In addition to completing the mobile app, we also need help finishing our React web application, so experience with both mobile and web development is required. Required Skills Expert in React Native Expert in React Strong JavaScript/TypeScript experience Experience integrating and maintaining Stripe Experience deploying and managing applications on Heroku Experience working with REST APIs Strong Git/GitHub workflow Experience publishing apps to the Apple App Store and Google Play Experience taking over existing codebases Strong debugging and problem-solving skills Excellent communication skills AI Experience (Required) You must have experience using Claude AI (Anthropic) as part of your development workflow to accelerate debugging, code reviews, refactoring, and feature development. We are looking for a developer who knows how to effectively leverage AI tools to improve productivity while maintaining high-quality code. Responsibilities Review and understand the existing codebase Fix all remaining bugs Complete unfinished features Finish our React web application Optimize performance Complete Stripe integrations Ensure smooth communication between frontend and backend Deploy updates through Heroku Prepare both mobile apps for App Store and Google Play submission What We're Looking For This project is not for a beginner. We need someone who is comfortable stepping into an existing project, understanding another developer's architecture, and delivering a polished, production-ready product. When You Apply, Please Include Links to at least 3 React Native apps you've personally built Links to React web applications you've worked on Your GitHub profile Your hourly rate Your availability over the next 30 days A brief explanation of your experience with Stripe, Heroku, and Claude AI An estimate of how many hours you believe it will take after reviewing the codebase Only apply if you have extensive experience with React Native, React, Stripe, Heroku, and taking over existing projects.

  • Fixed price
  • Intermediate
  • Est. budget: $1,000.00

Looking for a React/Supabase developer to build a backend for an existing web app. Responsibilities include implementing user authentication using Supabase Auth and designing a database schema. The ideal candidate will have experience in backend development and a strong understanding of React and Supabase.

  • Hourly: $40.00 - $80.00
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

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

  • Hourly: $21.00 - $26.00
  • Intermediate
  • Est. time: More than 6 months, 30+ hrs/week

About Us This position is for the second software engineer joining the ChartBriefs team. You will work directly with our lead engineer to learn the existing architecture, maintain and improve our production platform, troubleshoot and resolve customer and production issues, and help design and build the next generation of AI-powered features. This is a long-term role focused on becoming a core member of our engineering team as the product continues to grow. This individual needs to be available during North America Business Hours for trouble tickets, work and communicating with the team. ChartBriefs is an AI-powered SaaS platform that transforms thousands of pages of medical records into organized, searchable case summaries for physicians, attorneys, and medical experts. Our production platform combines OCR, LLMs, AWS cloud infrastructure, and a React frontend to process complex medical documents at scale. We are not building a prototype. We have a live product with paying users and are looking for a second senior engineer to help maintain, improve, and expand the platform. What You’ll Be Working On This is a hands-on engineering role across the full stack. Responsibilities include: * Maintaining and improving our production OCR and AI extraction pipeline * Building new product features * Debugging production issues across Python, AWS, PostgreSQL, and React * Improving extraction quality using prompt engineering and structured outputs * Optimizing LLM cost, latency, and throughput * Developing FastAPI endpoints and background workers * Improving application performance and scalability * Managing database design and migrations * Developing and improving the React frontend * Expanding automated testing and reliability * Assisting with migration toward a more serverless AWS architecture Required Experience We are looking for someone who has built and maintained production software, not just prototypes. Required experience includes: * Strong Python development * FastAPI * PostgreSQL * REST APIs * AWS * React and TypeScript * Production experience with LLM-powered applications, including Claude, OpenAI, Bedrock, or similar platforms * Experience debugging and maintaining production SaaS applications Nice to Have Experience with any of the following is a major plus: * OCR systems such as AWS Textract, Azure Document Intelligence, Tesseract, or similar tools * Medical records or healthcare software * Legal technology * PyMuPDF * PDF.js * Redis * Docker * Infrastructure as Code * Vector search or RAG systems What Success Looks Like Within your first 90 days, you should be able to: * Understand the existing architecture * Resolve production issues independently * Ship backend and frontend features * Improve extraction quality * Participate in architecture discussions * Help improve system reliability and scalability How We Work You will work closely with our lead engineer, who designed the existing platform. We use: * GitHub * Pull requests * Code reviews * Feature branches * Production deployments * Agile development This is intended to be a long-term engineering role, not a short freelance project. When Applying Please answer the following questions in your proposal: 1. Tell us about yourself. Briefly describe your background and what interests you about this role. 2. Describe a production AI or LLM application you have built or maintained. What technologies did you use, what was your role, and what technical challenges did you solve? 3. Describe your experience with our core technology stack. Specifically include your experience with Python, FastAPI, PostgreSQL, React and TypeScript, AWS, and LLMs such as Claude, OpenAI, or Bedrock. 4. Have you worked with OCR or large document-processing systems such as AWS Textract, Azure Document Intelligence, Tesseract, or similar tools? If so, describe the project and your responsibilities. 5. Have you maintained and improved an existing production SaaS application rather than building one from scratch? Please describe the production issues, new features, or infrastructure improvements you were responsible for. 6. Please provide links to your GitHub, portfolio, or other examples of relevant production work, if available. 7. What is your hourly rate, expected weekly availability, and typical working hours? Please also confirm that you can overlap with North American business hours.

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