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Posted 4 weeks ago
  • Fixed price
  • Expert
  • Est. budget: $5,000.00

Disregard the job amount. Looking for bids from well qualified App developers with experience and proof of work. React Native Developer — Location-Based Discovery App with AI Voice & MLS Integration Description I'm looking for an experienced React Native developer to build a production mobile app (iOS and Android) from a fully working prototype I've already built and tested. The app is in the real estate space and uses GPS, AI voice narration, and live property data to create a unique discovery experience for buyers. The core concept is new to market — NDA required before details are shared. **What the app includes:** A location-aware experience that responds to the user's real-world movement and narrates relevant property information automatically — hands free. A planned route feature that allows users to build and optimize a multi-stop property tour from their current location with guided navigation between stops. A full search and filter system with map and list views, save/favorite functionality, ratings, and notes. A complete self-serve advertiser portal with subscription tiers, campaign management, analytics dashboard, and payment processing. User profiles, notification preferences, and a self-listing submission flow for property owners. **Tech stack:** - React Native (iOS + Android) - Node.js + PostgreSQL backend - Mapbox GL JS (maps + directions) - Third-party voice and property data APIs (details shared under NDA) - Stripe for payments - Push notifications **What I provide:** - Fully working prototype with all screens and logic built - Complete feature and developer specification documents - All API integrations already selected and tested - NDA required before sharing details **Ideal candidate:** - Shipped React Native apps in the App Store and Google Play - Experience with GPS and location-based features - Mapbox experience a strong plus - Comfortable working from detailed specs independently - Available for regular communication and milestone check-ins **Project:** Fixed price or milestone-based, open to discussion **Timeline:** MVP launch within 4–5 months *Serious inquiries only. Please include links to apps you've shipped.*

Posted last month
  • Hourly
  • Expert
  • Est. time: 3 to 6 months, Less than 30 hrs/week

We are building an AI-adaptive financial literacy platform for high school students, funded by a U.S. Department of Education grant. The platform personalizes learning along two axes: (1) mastery-based adaptive routing driven by a diagnostic assessment, and (2) AI-generated financial scenarios using live economic data (BLS, Zillow, FRED, College Scorecard) tailored to each student's location and post-secondary plans. Phase IA Scope (This Contract) This is not a full product build. The Phase IA deliverable is: One complete working module with adaptive routing and AI scenario generation fully functional Live API integrations pulling real economic data into the scenario engine Student profile and onboarding flow Basic teacher dashboard (class progress, mastery status) Research data logging for a usability/feasibility pilot study with ~25 high school students Cloud deployment for the pilot Timeline: ~9 months, estimated start October 2026 Estimated commitment by phase: Months 1–2 (Design & Architecture): ~10 hrs/week Months 3–6 (Active Development): ~25–35 hrs/week Months 7–8 (Pilot Deployment & Study): ~15–20 hrs/week Month 9 (Wrap-up & Documentation): ~5–10 hrs/week Total estimated engagement: 600–750 hours over the project period. A successful Phase IA creates eligibility for a Phase II award ($1M, 2 years) to build the full platform. Note that we are proposing this project to the government and will only proceed once we secure funding. Required Skills & Experience Full-stack development: React or Next.js frontend, Node.js or Python backend LLM integration: OpenAI or Anthropic API, prompt engineering RAG architecture: retrieval-augmented generation with live data sources REST API integration: third-party data APIs Database design: PostgreSQL or MongoDB Secure auth with role-based access (student/teacher) Preferred Adaptive learning or assessment-driven platform experience EdTech background Familiarity with FERPA or student data privacy To Apply Submit current resume/CV Confirm you are a U.S. citizen or green card holder (hard requirement — federal contract) Briefly describe a relevant AI or adaptive platform you've built Your hourly rate and availability starting October 2026 Applications without citizenship confirmation will not be reviewed.

  • Hourly: $50.00 - $100.00
  • Expert
  • Est. time: More than 6 months, Less than 30 hrs/week

I’m looking for a senior AI app developer who can help me build an AI-powered MVP while also guiding me through the technical decisions. This is not just a coding task. I want someone who can think through the product, recommend the right architecture, explain tradeoffs, and build the first working version. The ideal person should be comfortable with OpenAI/LLM integrations, full-stack development, database design, authentication, deployment, and startup-style MVP execution. I’d like to work with someone who can act almost like a technical partner: build the product, teach me what is being done, and help me understand how to maintain or scale it later.

  • Hourly: $70.00 - $125.00
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

I am building Dewy, an early-stage construction technology platform focused on construction buyout and subcontractor quote intelligence. The first MVP is intentionally narrow: users should be able to upload subcontractor quote/proposal documents and receive structured outputs showing included scope, exclusions, assumptions, qualifications, cost structure, alternates, allowances, and potential risk flags. I have already developed the product concept, construction logic, early workflows, and prototype direction using Codex/AI tools. I am not looking for someone to invent the product from scratch. I need a senior AI product engineer who can review what I have, determine what is usable, define a clean MVP architecture, and help turn the current direction into a working private beta. Initial scope: * Review the current prototype/code/product materials. * Identify what should be reused vs. rebuilt. * Recommend the MVP architecture and tech stack. * Define the AI document-processing workflow. * Design the structure for file upload, extraction, editable results, and export. * Help create a realistic build roadmap, timeline, and budget. * Potentially continue into hands-on MVP development if there is a strong fit. Ideal experience: * Full-stack SaaS / MVP development * AI / LLM application development * OpenAI API or similar model integrations * Document extraction or document intelligence workflows * PDF/DOCX parsing and structured data extraction * React / Next.js * Python * APIs and backend workflows * Supabase/Postgres or similar database experience * Vercel or similar deployment experience * Ability to work with a non-technical founder and translate business goals into a practical build plan This is not a full enterprise platform build yet. The first MVP should stay focused on one core workflow: Subcontractor quote documents in → structured buyout intelligence out. Please respond with: 1. Relevant AI/document extraction projects you have built. 2. How you would approach the MVP architecture. 3. Whether you recommend starting with an audit/roadmap before build. 4. Your hourly rate and availability. 5. Whether you are interested in ongoing build involvement after the initial review.

  • Hourly: $35.00 - $60.00
  • Expert
  • Est. time: 1 to 3 months, Less than 30 hrs/week

## Project at a Glance - Project stage: Partially built; bootstrapped project where efficiency, speed, cost, and lean execution matter. - Expected project duration: Approximately 1 to 2 months. - Engagement type: Independent contractor / hourly engagement only. - Scale target: The app should be architected with future growth in mind, including a target capacity of 80,000+ monthly active users with reasonable headroom to scale without avoidable rework, security degradation, or performance issues. - Security posture: SOC 2 readiness should be considered from day one; certification may occur later. - Meetings: One weekly video sync of up to 60 minutes may be scheduled by mutual agreement and should be accounted for in the contractor’s proposed budget. ## Overview We are building a production-grade, multi-tenant SaaS web application designed for enterprise-level scale, security, and reliability. The application may handle employee data and is being built with SOC 2 readiness in mind from day one. This is a bootstrapped project. Speed and lean execution are critical, and every decision should balance quality with pragmatism. The product is being designed to last, scale, and withstand technical, security, and operational scrutiny. We are seeking a U.S.-based individual senior full-stack engineer who can personally lead the web app development scope through production-ready implementation, end to end. No outsourcing outside the U.S. No agencies. ## Technology Stack - Front-end: Next.js App Router, TypeScript, Tailwind CSS - Backend / API: Next.js API Routes, Supabase Edge Functions, FastAPI / Python - Database: Supabase PostgreSQL - Authentication: Supabase Auth, OAuth, SSO, MFA - Authorization: RLS / Row-Level Security, RBAC - Realtime: Supabase Realtime - LLM / AI: OpenAI / Anthropic / Gemini-compatible LLMs - Billing: Polar.sh - HRIS Integration: Unified third-party connector - Email Delivery: Resend - Analytics: PostHog - Error Monitoring: Sentry - Infrastructure: Vercel + Supabase - CI/CD: GitHub Actions - Testing: Vitest / Jest, Playwright - AI Agents: Agentic workflows, tool use, and related architecture - MCP Integrations: MCPs for ChatGPT, Claude, Gemini, or similar environments - Additional technologies may be used. ## What We Are Looking For - Experienced full-stack SaaS product engineer with a strong, verifiable portfolio - Deep expertise in Next.js and TypeScript - Production-grade Supabase experience, including RLS, Realtime, and Edge Functions - Python back-end development experience with LLM integration, including RAG pipelines, memory, or fine-tuning workflows - Experience implementing subscription lifecycle flows and seat-based access control end to end - A genuine standard for clean, well-organized, maintainable code - Demonstrated ability to design systems that can scale horizontally without structural rework - Demonstrated ability to work efficiently in a lean, bootstrapped environment - Security-first development practices, especially when handling sensitive or regulated data - Clear, prompt professional communication - Experience building AI agents or agentic workflows - Experience building MCP integrations for ChatGPT, Claude, Gemini, or similar platforms - Experience designing hierarchical multi-tenant account structures with seat-based access control ## Strongly Preferred - Hands-on experience building RAG pipelines and LLM fine-tuning workflows in production - Experience handling employee or HR data, including PII access controls, audit trails, and data residency considerations - Experience building toward SOC 2 readiness in a prior engagement - HRIS or enterprise HR system integration experience - Familiarity with OWASP, NIST CSF, or CIS Controls ## This application is being built to last and may handle sensitive employee data. We are looking for an engineer who takes code quality, data responsibility, lean execution, and long-term system health seriously. ## Please answer all 5 screening questions in your response. ## Communication - Contractor should identify normal availability windows and provide timely responses, generally within one business day during those agreed availability windows. - Day-to-day communication will generally be async through the applicable platform or contract workroom. - One weekly video sync of up to 60 minutes may be scheduled by mutual agreement for status updates, completed-work summaries, blockers, and upcoming priorities. Contractor should account for this meeting time in the proposed hourly rate or budget. - Pre-engagement sales, proposal, or introductory scoping discussions are not billable. ## Confidentiality and IP Project details are shared only after the client’s NDA is executed. If both parties decide to move forward, a separate IP Assignment Agreement is required before any offer is accepted or substantive work begins. This is an independent contractor / hourly engagement only and does not include full-time employment, salary, benefits, equity, revenue share, product ownership, or any ongoing engagement beyond the agreed scope.

Posted last month
  • Hourly: $40.00 - $100.00
  • Intermediate
  • Est. time: More than 6 months, Less than 30 hrs/week

Are you a developer who actually enjoys talking to people, or a tech-adjacent professional who wants to leverage your software background for high-paying outbound roles? We are building an engineering-focused platform and need a Native American English speaker to handle technical discovery calls and schedule product demos with CTOs, VREs, and Lead Architects. Instead of reading a robotic script, you will be having peer-to-peer technical conversations to qualify leads. We are specifically looking for someone with prior development experience (React, Node.js, Python, or similar stacks). You won't be writing code in this role, but you must speak the language. Because you understand architecture bottlenecks, API integrations, and developer pain points, you can easily navigate technical gatekeepers and hold meaningful conversations with senior engineering leadership. This is a fully remote, part-time position with highly flexible hours, but calls must be made during standard U.S. business hours (EST/PST). You will need a quiet home office, a solid internet connection, and a professional headset. If you want to step away from the IDE for a few hours a day and use your dev background to drive outbound growth, apply with a quick overview of your tech stack and a brief Loom introduction.

  • Hourly: $15.00 - $30.00
  • Intermediate
  • Est. time: 1 to 3 months, Less than 30 hrs/week

About the project We’re building GoodCare OS — an operating system for home care and pediatric home health agencies. Already have a polished React demo (~25,000 lines, three apps: admin web, caregiver mobile, nurse mobile) running on git hub (will share link when you apply). Our founder runs three real agencies in TN and TX, so the platform has built-in customer #1. We need a senior engineer to take this from demo to production SaaS. Sprint 1 (2 weeks) is the foundation: set up real infrastructure, migrate mocked demo data to a real Postgres database, wire up auth, get the first customer org logging in. Tech stack React 18 + Vite · Node.js · Supabase (Postgres + Auth) · Render · Netlify · Doppler · Sentry · PostHog. Familiarity with Twilio, Stripe, and React Native a plus for follow-on sprints. Must-haves • 5+ years shipping production web apps end-to-end • Strong React + TypeScript • Postgres fluency, especially row-level security • Worked at an early-stage startup as the only or one of few engineers • US-based or full overlap with US Central Time • HIPAA experience strongly preferred Nice-to-haves • Healthcare SaaS / EVV / Medicaid billing experience • Multi-tenant SaaS architecture experience • Shipped a React Native / Expo app to stores How to apply Please include: 1. Link to a production app you shipped (your role + what you built) 2. One paragraph on the trickiest production bug you ever fixed 3. Your hourly rate and availability over the next 2 weeks No agencies, no resellers, no generic proposals. I’ll respond within 48 hours to anyone whose application addresses the three points above.

  • Fixed price
  • Expert
  • Est. budget: $2,500.00

React Native + Next.js Developer — Community Platform Rebuild (Supabase + Expo) Project overview I'm the founder of Everything Ave Maria (everythingavemaria.com) — a community super-app for Ave Maria, FL serving local residents and businesses. Think of it as a hyperlocal all-in-one platform: business directory, deals and coupons, events and tickets, community feed, marketplace, emergency alerts, and more. The platform is fully built and live on a Supabase backend with 33 tables, full RLS security, Stripe subscriptions, Resend email, real-time feeds, and AI features. The backend is solid and stays as-is. What I need is a developer to rebuild the frontend in clean, maintainable code AND build a native mobile app (iOS + Android) on top of the same Supabase backend. This is not a design-from-scratch project — the design system, color palette, component structure, and feature spec are all defined. You are building a clean implementation of an existing product. What you'll build PART 1 — Web app rebuild (Next.js 14) Rebuild the current React/Vite frontend in Next.js 14 (App Router) connected to the existing Supabase project. Same features, same design system (Tailwind + shadcn/ui, sky blue #0ea5e9 + gold #F59E0B), cleaner code. Core pages to rebuild (28 total): — Homepage (7-section layout: hero, today strip, quick access, deals, events, community feed, footer) — Business directory + individual business pages — Deals and coupons with two-phase redemption flow — Events calendar — Community feed (threaded posts, reactions, replies, real-time updates) — Marketplace (listings, buyer/seller messaging) — Resident dashboard + Business owner dashboard — Admin console (11 panels: analytics, businesses, deals, events, moderation, etc.) — Auth (email + Google OAuth via Supabase) — SEO pages (/services/:slug, /best/:slug with JSON-LD) PART 2 — Native mobile app (Expo / React Native) Build an Expo app connected to the same Supabase backend covering the 5 core screens: — Home (today strip: weather, next event, top deal, community post) — Business directory — Deals and coupons — Events — Community feed Plus: — Expo push notifications (iOS via APNs + Android via FCM v1) — this is required, not optional — Supabase auth (email + Google OAuth) — Bottom tab navigation with labels (not icon-only) — Senior-friendly design: minimum 16px text, 56px tap targets, large buttons — EAS Build configuration for App Store + Google Play submission Existing backend you'll connect to — Supabase (Postgres + Auth + Realtime + Storage + Edge Functions) — I will share credentials — 10 existing edge functions: AI concierge, business autofill, Stripe checkout, customer portal, subscription check, email sending, marketplace alert matching, sitemap, account deletion — Stripe subscriptions (Pro $49/mo, Featured $149/mo, Exclusive $299–499/mo) — Resend transactional email — NOAA/NWS weather API (station KRSW) — Google OAuth You do NOT need to touch the database schema, RLS policies, or edge functions. Backend is complete. Tech stack required — Next.js 14 (App Router) — required — Expo SDK 51+ with React Native — required — TypeScript — required — Tailwind CSS + shadcn/ui — required — Supabase JS client (@supabase/supabase-js) — required — Expo Notifications + EAS Build — required — Stripe JS — required — React Query (TanStack) — preferred Deliverables 1. Next.js web app deployed to Vercel, connected to existing Supabase project, all 28 pages functional 2. Expo native app with core 5 screens + push notifications working on iOS and Android 3. EAS build profiles configured (development, preview, production) 4. App Store and Google Play submission ready (I handle the actual submission) 5. Clean GitHub repo with README and deployment instructions 6. Handoff call walking me through the codebase Timeline — Web app core (homepage + directory + deals + events + auth): 2 weeks — Remaining web pages + admin dashboard: 2 weeks — Expo native app + push notifications: 2 weeks — Testing, fixes, App Store prep: 1 week Total: approximately 7–8 weeks part-time Budget Fixed price preferred. I am budgeting $2,500–3,500 for the full scope. If your rate is significantly outside this range, please explain what you'd de-scope or what timeline you'd propose instead. I am open to milestone-based payment: web app launch, native app launch, App Store approval. Who I'm looking for — You have shipped at least one React Native or Expo app that is live in the App Store or Google Play. Please include the App Store or Play Store link in your proposal — this is required. — You are comfortable working with an existing Supabase schema and can read and understand RLS policies — You write clean TypeScript — not AI-generated spaghetti code — You communicate clearly and proactively. If something is unclear or blocked, you say so immediately. — You are available for a short video call before I hire What I'm NOT looking for — Agencies or teams — I want to work directly with the developer doing the work — Anyone who will use AI builders (Lovable, Bolt, etc.) to generate the frontend. I already have that. I need clean handwritten code. — Developers who haven't touched React Native or Expo before and want to learn on my project To apply — answer these 3 questions in your proposal 1. Share the App Store or Google Play link to a native app you personally built and shipped 2. Have you configured Expo push notifications with both APNs (iOS) and FCM v1 (Android) before? Describe what you did. 3. What's your honest assessment of the $2,500–3,500 budget for this scope — is it workable, and if not, what would you adjust? Proposals that do not answer all 3 questions will not be read. I'm ready to start immediately.

  • Hourly: $75.00 - $125.00
  • Expert
  • Est. time: 3 to 6 months, Less than 30 hrs/week

## Project Overview I am seeking an experienced Senior AI Systems Architect / Full-Stack Engineer to evaluate and potentially lead the technical architecture of a new enterprise software platform currently under development. At this stage, I am not looking for someone to simply write code. I am looking for an experienced technical professional capable of evaluating architecture, recommending technologies, and helping define the engineering roadmap for Version 1. The project involves the integration of artificial intelligence, enterprise software architecture, workflow automation, secure data management, API integrations, and cloud-based application design. Because the project contains proprietary intellectual property, detailed information will not be disclosed during the initial interview process. Candidates selected to move forward will be asked to execute a Non-Disclosure Agreement before reviewing project documentation. ## Initial Objectives • Review the existing project at a high level. • Evaluate technical feasibility. • Recommend the most appropriate technology stack. • Design the production architecture. • Develop an implementation roadmap. • If mutually agreed, continue as the lead software architect for Version 1. ## Required Experience Applicants should have significant experience with: • Enterprise software architecture • Artificial Intelligence integration • API development and integration • Full-stack application development • Cloud architecture and deployment • Database design • Authentication and application security Excellent communication skills are important. I am looking for someone who enjoys solving complex architectural challenges and who is interested in building something from the ground up. ## Please Include 1. A brief summary of your architecture experience. 2. Examples of enterprise software systems you have helped design. 3. AI-related experience. 4. Your preferred technology stack. 5. Why this opportunity interests you. The initial engagement is intended as an architectural evaluation. A longer-term relationship may develop if there is a strong mutual fit.

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

We are seeking an experienced developer to create a mobile app for both Apple and Android platforms. The ideal candidate will have a strong background in mobile app development, with the ability to design, develop, and deploy apps on the App Store. Responsibilities include developing user-friendly interfaces, ensuring app stability, and collaborating with our team to meet project goals. Looking to integrate pictures and videos to YouTube channel with preset settings. NDA required. Job Title: iOS & Android App Developer – Branded Fan Video Submission App (Fast Car Geek) Project Type: Fixed Price Project Scope: Large Duration: 3–6 months estimated Project Overview Fast Car Geek (youtube.com/@FastCarGeek) is a 239,000-subscriber YouTube automotive channel based in Sedona, Arizona. We are looking for an experienced mobile app developer to design, build, and submit a fully branded fan video submission app to both the Apple App Store and Google Play Store. The app will allow subscribers to film or upload car videos from their phones and submit them directly to our team for potential feature on the Fast Car Geek YouTube channel. Core Features Required User-Facing (Subscriber Side) Fast Car Geek branded UI (logo, colors, fonts provided) In-app video recording OR video upload from camera roll Submission form: submitter name, car year/make/model, city/state, brief description Mandatory Terms & Content License Agreement checkbox (must be accepted before submission can be sent) Confirmation screen and email receipt upon successful submission Push notification capability (for status updates: received / selected / featured) Admin-Facing (Our Side) Secure web-based admin dashboard View, preview, download, approve, or reject submissions Tag submissions by status (pending / approved / featured / declined) Basic search and filter (by date, car type, location) Storage solution for submitted video files (cloud-based, scalable) Technical Requirements Native iOS & Android OR cross-platform (React Native or Flutter acceptable — please specify your preferred stack and justify) App Store submission (Apple App Store + Google Play) Cloud video storage integration (AWS S3, Firebase, or equivalent) Secure user authentication (email sign-up or social login) Compliance with Apple App Store and Google Play content guidelines Scalable to handle up to 10,000 registered users at launch Deliverables Full source code (transferred to client upon final payment) iOS build submitted to Apple App Store Android build submitted to Google Play Store Admin dashboard (web-based) Basic user/admin documentation 30-day post-launch bug support Content Rights & Submission Agreement Language (Draft — requires attorney review before implementation) By submitting video content through this application, you ("Submitter") grant Fast Car Geek and its owner(s) a perpetual, royalty-free, worldwide, non-exclusive license to use, reproduce, edit, display, distribute, and publish the submitted video content across all platforms and media, including but not limited to YouTube, social media, and promotional materials. You represent and warrant that you are the sole owner of the submitted content and that it does not infringe upon the intellectual property, privacy, or other rights of any third party. Fast Car Geek reserves the right to accept or decline any submission at its sole discretion. Submission of content does not guarantee feature, compensation, or credit. ⚠️ Flag for your attorney: Have this reviewed before the app goes live. You specifically want coverage for: IP ownership, minor privacy (if any submitters are under 18), release/waiver language, and CCPA/GDPR compliance if you collect user data. What We're Looking For Portfolio of 2+ published iOS/Android apps (links required) Experience with video upload and cloud storage integrations App Store submission experience (both Apple and Google) Strong communication — we need milestone updates, not silence Ability to provide a phased project plan with clear milestones Budget & Proposals Please include in your proposal: Your recommended tech stack and why Estimated timeline broken into phases Your fixed-price bid OR milestone-based pricing structure Links to relevant prior work.

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