- 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.
- Hourly: $40.00 - $85.00
- Expert
- Est. time: 3 to 6 months, 30+ hrs/week
We need to have a AI developer who is readily available on slack to fix any errors that may arise from our app and to do monthly check and updates. we want this to be long term and to be a partnership. Occasionally we may have a new project to work on as well.
- Fixed price
- Expert
- Est. budget: $1,100.00
NobleProg is seeking an experienced Full Stack Development Trainer to deliver live, instructor-led training focused on building web applications using the FARM stack: FastAPI, React, and MongoDB. This course focuses on helping developers build dynamic, high-performance, and scalable full stack web applications using Python-based backend development, React frontend development, and MongoDB database integration. Engagement Details Location: Remote Daily Rate: $1,100 per training day Duration: 2 days Number of Participants: 5 Course Scope The training covers the full FARM stack development workflow, from environment setup and backend API development to React frontend implementation, MongoDB integration, application testing, deployment, and basic security practices. Course Outline - https://www.nobleprog.com/cc/farmstack NobleProg SOP - https://share.synthesia.io/a0788c6e-56d5-4da8-92c6-0d5c03ad6d52 Key Topics Include * FARM stack overview and comparison with MERN * FastAPI, React, and MongoDB development environment setup * MongoDB Atlas setup and database connection * Building REST APIs with FastAPI * CRUD operations and MongoDB functions * API testing and troubleshooting * Creating React projects and frontend components * Using axios, bootstrap, CSS, and JSX * Adding interactive frontend functionality * Testing full stack applications * Backend and frontend deployment * Authentication, user management, routers, and access permissions Trainer Responsibilities * Deliver engaging, instructor-led FARM full stack development training * Provide practical examples and hands-on lab exercises * Explain backend, frontend, and database concepts clearly * Support participants in building and testing full stack applications * Customize the course based on participant background and client needs * Prepare training materials and hands-on exercises (trainer remains the ownership of training content) Required Qualifications * Strong hands-on experience with FastAPI and Python backend development * Strong experience with React frontend development * Experience working with MongoDB and MongoDB Atlas * Experience building, testing, and deploying full stack web applications * Prior experience delivering technical or corporate training Nice to Have * Experience with FARM, MERN, or similar full stack development frameworks preferred * Experience with authentication and user management implementation preferred * Experience deploying applications using Heroku, GitHub, or similar platforms preferred How to Apply Please include * A brief overview of your FARM or full stack development experience * Your experience with FastAPI, React, and MongoDB * Your experience delivering instructor-led or corporate technical training * Confirmation of remote and/or onsite availability in the USA * Any relevant examples of full stack development training delivered
- Hourly: $30.00 - $185.00
- Expert
- Est. time: 1 to 3 months, Less than 30 hrs/week
Experienced Dev Ops from start to finish, We are seeking a skilled Python and React Developer Expert for Web Based Trading Application Platform to create a robust and user-friendly application for both web and mobile users. The ideal candidate will have experience in developing and launching apps from start to finish. Knowledge of stocks and options is necessary or trading experience is a MUST. If you do not know how to trade stocks or options, you will be required to take a strategy class (fee paid by the applicant freelancer) with founder owner, to learn how the trading strategy works, in-order to be hired. Deliverables • Ensure existing application functionality and performance as per founder owners requirements • Strategy is proprietary and is confidential for period of 30 years • All coding is live over anydesk each day, all coding sessions are recorded over zoom
- Hourly
- Expert
- Est. time: More than 6 months, 30+ hrs/week
Full-Stack Developer — EdTech Subscription Platform (Next.js + Supabase) · USA Only Overview I am building a production-grade subscription learning platform for students and parents. A complete BRD is available under NDA after initial screening. Looking for a skilled US-based developer or small team who can deliver a polished, secure, scalable product. Tech Stack (Non-Negotiable) Next.js 14 (App Router) · TypeScript strict · Tailwind CSS · Supabase (PostgreSQL + Auth + Storage) · Stripe Billing + Stripe Tax · Vercel · PostHog (self-hosted) · Resend · PDF.js WordPress, PHP, and MySQL are explicitly prohibited. Core Deliverables 1. COPPA-compliant parent-child account system — parental consent flow, 1+ child profiles per account, post-login profile picker, parent dashboard with billing and data rights controls. 2. Public marketing site — homepage, pricing, blog, FAQ, contact, and supporting pages. Full SEO, Core Web Vitals compliant, fully responsive. 3. Subscription billing — Stripe Billing + Stripe Tax, PayPal secondary, free trial, promo codes, dunning, all admin-managed without code changes. 4. Secure content library — in-browser PDF viewer, server-side dynamic watermarking, multi-filter search, favorites, download counter. 5. Educational games integration. 6. CMS and admin panel — two roles (Moderator, Super Admin), full content and subscriber management, promo codes, analytics, editable email templates. What I Provide Complete BRD (under NDA) · brand assets · all content files · all third-party service accounts · attorney-reviewed legal text before launch. What I Expect From You US-based — required Excellent understanding of COPPA compliance Full source code to my private GitHub — I retain full ownership No vendor lock-in, no proprietary frameworks Prior subscription SaaS or edtech experience preferred Fixed-price or milestone-based quote with breakdown To Apply Relevant work samples (Next.js + Supabase preferred) Estimated timeline for full scope Fixed price or milestone breakdown Confirmation you are US-based Short, specific proposals only. Generic bids will not receive a response.
- Fixed price
- Intermediate
- Est. budget: $5,000.00
About the Business I own Meet U @ The Net, an established beach volleyball league in Southern California. Website: https://meetuatthe.net The league currently runs multiple seasons per year, has strong player retention, and regularly reaches registration capacity. I am looking for a developer or small team to help modernize the business systems while providing documentation and knowledge transfer so I can eventually manage and improve the platform myself. This is not a one-time project. I intend to build the platform in phases over multiple seasons. Phase 1 Goals CRM Foundation Current data exists across: Excel Airtable Google Sheets The goal is to consolidate historical league data into a single CRM/database. Examples: Players Teams Seasons Registrations Waitlists Payments Participation history Website Rebuild Build a modern website focused on: Registrations League information Schedules Standings FAQ Mobile responsiveness SEO foundation AEO foundation Registration System Support: Individual registrations Team registrations Waitlists Coupon codes Discount codes Payment tracking Waiver System Requirements: Team captains can register teams Individual players must create their own profile Individual players must sign their own waiver Waiver tracking and status management Knowledge Transfer (Required) I do not want a black-box system. I want: Written documentation Loom walkthrough videos Live walkthrough sessions Ability to ask questions after launch The goal is to learn how the system works while it is being built. Future Phases (Not Part of Phase 1) Future projects may include: Scheduling tools Referee score entry portal Automatic standings Sponsorship CRM AI features Mobile applications The initial focus is building a strong foundation. Preferred Technologies Open to recommendations. Currently interested in: Next.js Supabase OpenAI GitHub Budget Approximately: $5,000 – $7,000 for Phase 1 Future phases expected if Phase 1 is successful. Looking For Full-stack developer or small team CRM/database experience SaaS experience Strong communication Documentation-focused Comfortable working with non-technical founders Please send: Relevant projects Technologies used Availability Pricing model Examples of documentation or client training
- Hourly: $45.00 - $70.00
- Intermediate
- Est. time: 1 to 3 months, Less than 30 hrs/week
Sphere Inc. is building a new AI-powered SaaS platform for the U.S. healthcare industry. We're looking for a senior engineer who enjoys building products from scratch, making technical decisions, and shipping production-quality software. This is an MVP that will quickly transition into production, so we're looking for someone who is comfortable owning architecture, development, deployment, and AI integration. We're developing a HIPAA-compliant Care Coordination Platform that helps physicians, nurses, and care coordinators manage chronic care patients more efficiently. A patient with diabetes and hypertension visits a primary care clinic. Instead of manually reviewing hundreds of pages of clinical notes, lab results, discharge summaries, and specialist referrals, the provider uploads the patient's records. The AI platform will: - Extract structured medical information from uploaded documents - Generate concise clinical summaries - Highlight medication conflicts and missing follow-ups - Detect abnormal lab trends - Recommend preventive care actions based on clinical guidelines - Generate visit notes and patient-friendly summaries - Allow physicians to approve, edit, or reject AI-generated recommendations - Maintain complete audit trails for HIPAA compliance The system must never expose PHI to unauthorized users and must meet healthcare security best practices. You'll work directly with our founders to design and build the MVP. Responsibilities include: - Design scalable backend architecture - Develop responsive React/Next.js frontend - Build secure REST APIs - Integrate OpenAI, Anthropic, or Azure OpenAI - Implement Retrieval-Augmented Generation (RAG) - Build document ingestion pipelines - Implement vector search - Build role-based access control - Design PostgreSQL database schema - Implement authentication and authorization - Deploy production infrastructure on AWS or Azure - Write automated tests - Optimize AI performance and costs Candidates should understand: - HIPAA Security Rule - PHI handling - Encryption at rest and in transit - Audit logging - Role-based permissions - Secure cloud architecture - Least-privilege access - Secrets management - BAA-aware cloud services Previous healthcare or medical SaaS experience is highly preferred. To Apply Please include the following in your proposal: - Links to recent AI SaaS or healthcare projects - Your GitHub profile - A brief description of your HIPAA or healthcare experience - 5–10 minute Loom video walkthrough of a HIPAA-compliant AI or SaaS project you personally built, highlighting the architecture, technical decisions, and your specific contributions.
- Hourly
- Intermediate
- Est. time: 1 to 3 months, Less than 30 hrs/week
We are seeking a skilled frontend software developer to enhance our web application. The ideal candidate will have experience in modern web technologies and a strong understanding of user interface design. Responsibilities include developing responsive and interactive web pages, collaborating with the backend team, and ensuring cross-browser compatibility. Familiarity with React and Angular is a plus.
- Hourly: $65.00 - $95.00
- Intermediate
- Est. time: More than 6 months, 30+ hrs/week
Senior Full Stack Developer — AI Platform Hardening (Trial-to-Hire) HillDave Labs builds an AI-driven platform for ad content and media buying, backed by 30 years of Fortune 500 production experience (Coca-Cola, PepsiCo, Microsoft, Disney). We're a lean, founder-led team of two heading toward a self-serve platform for brands and agencies. The platform works today but is fragile in places. We need a senior engineer to take ownership, fix what's brittle, and bring real engineering rigor before we open it to self-serve users at scale. Starts as contract work with a path to full-time once we see strong fit. What you'll do: Audit the codebase and fix the highest-risk fragility Harden core modules for reliable multi-user use Own architecture as we shift toward a self-serve product Work directly with founders, no layers What we need: Senior full stack experience, front-end to database Proven record stabilizing existing codebases Strong communicator US time zone, fluent English, real-time availability Comfortable with startup ambiguity and pace Engagement: 25-30 hrs/week, $85-95/hr, 8-12 week trial. Strong fit leads to full-time with salary, equity, and benefits. To apply: describe a time you inherited a messy codebase and made it trustworthy. What did you prioritize? Include your time zone and rate.
- Hourly: $50.00 - $125.00
- Expert
- Est. time: 1 to 3 months, 30+ hrs/week
Senior React Native Engineer — Take Over & Launch a Consumer Social App We're looking for a senior React Native engineer to take ownership of an existing, fully-built consumer social media app and get it to App Store launch quality. The app already works. A previous developer built it end to end, and we have a complete, functioning codebase. What we need now is an experienced engineer to take the wheel, harden it, and ship it: tighten the design, fix the speed, clean up the backend, eliminate bugs, and make every feature work exactly as intended. This is a polish-and-launch role, not a build-from-scratch role, so we want someone genuinely strong at improving an existing codebase rather than rewriting it. This is a video-first social product — an infinite media feed, video upload and playback, user profiles, direct messaging, notifications, and engagement/retention mechanics. Think of the surface area of a modern social app, and our bar is that it should feel as smooth and fast as the top social apps on the store. Right now it's close, and we need someone to take it the last mile. What you'll own Performance & smoothness — profile and fix slow screens, janky scrolling, slow cold starts, memory issues, and re-render problems. Feed and video playback in particular must be flawless. Design polish — tighten spacing, animations, transitions, and component consistency so the UI looks and feels professionally finished. Backend cleanup — review and improve the backend: data models, queries, API/edge functions, security rules, storage, and the media pipeline. Efficient, reliable, and ready for real users. Bug elimination — hunt down and fix every bug; deliver a stable, well-tested app. Feature completeness — make sure all existing features work as envisioned, end to end, with proper edge-case and error handling. App Store launch — get it through Apple App Store review: build config, signing, App Store Connect, privacy/permissions, store technical requirements. (Android is a likely follow-on.) The stack you'll be working in Frontend: Expo + React Native + TypeScript, Expo Router (Reanimated and EAS Build/Submit a plus) Backend: a managed cloud backend with Postgres, authentication, file/object storage, realtime subscriptions, and row-level security (BaaS-style; comfortable with SQL, policies, and serverless/edge functions) Video: a managed video pipeline for direct uploads, transcoding, and adaptive HLS streaming, plus object storage and CDN delivery Notifications: push notifications (OneSignal or similar) Payments: Stripe integration experience is a plus Native device APIs: comfort with camera, media library, background tasks, location, and notifications; able to write/maintain native modules when needed Tooling: Git, EAS, environment management, basic CI/CD, crash/error monitoring (e.g., Sentry) Must-haves 4+ years building production React Native apps, with shipped App Store apps you can show us Deep, demonstrable experience profiling and optimizing React Native performance (list/image/video tuning, memoization, startup and bundle optimization) Strong with a Postgres / BaaS-style backend (schema design, SQL, security rules, serverless functions) Real experience with video upload and playback Have taken an app through Apple App Store review to a live release Excellent written English, proactive communication, and comfort owning a codebase someone else wrote Nice-to-haves Realtime/social feed and messaging at scale, Reanimated/gesture-heavy UI, Stripe or marketplace payment flows, crash analytics and feature flags, and prior experience launching a consumer/social app. How we work Small, fast-moving founding team with direct access to the founder and quick decisions. We'll start with a short paid trial task so we can both confirm fit before committing to ongoing work; strong performers move into an ongoing, long-term engagement. Some overlap with US Central time is required. An NDA is required before code access. To apply, please include: Links to 1–3 App Store apps you've built and your exact role on each A time you made an existing React Native app dramatically faster or smoother — what was slow, what you did, and the measured result Your experience with video upload/playback and with a Postgres/BaaS backend Your weekly availability and your US-Central overlap Start your reply with the word "SMOOTH" so we know you read this. Generic proposals will be ignored.