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.

We're looking for a senior full-stack engineer to take on hands-on work across our web platform, architecting features, building APIs, and delivering polished, performant UI. Looking for someone that can do full stack but is heavy UI developmenet leaning. You'll be doing: Building full-stack features end-to-end (dashboards, booking, payments, admin tools, etc.) Modernizing existing code and reducing technical debt Node.js services, REST APIs. Performance optimization across front-end and backend CI/CD, automated testing, container-based deploys You should have: 8+ years building production web apps Strong TypeScript across a modern framework (React) Solid Node.js / Express backend experience AWS or GCP, Docker, and CI/CD experience Comfort with PostgreSQL Automated testing (Jest, Vitest, or similar) Bonus: AdonisJS, Golang

OVERVIEW I'm building Inkora, a subscription web app: an AI creative-writing companion for fiction (romance, fan fiction, poetry, general fiction). The React front-end is COMPLETE and will be provided, with clearly marked integration points. I need the backend built, connected, and the full app deployed. This is an 18+ platform with content safeguards. STACK ALREADY IN PLACE - React front-end (provided; single-file app ready to be scaffolded into a project) - GitHub (repo will live on my account) - Vercel (hosting, my account) - Stripe account created - Anthropic (Claude) API key — must live server-side only, never in client code - Domain: inkora.com SCOPE OF WORK 1. Secure AI endpoint — a serverless endpoint (e.g. POST /api/write) that attaches the provided system prompt, calls the Claude API with the server-side key, and returns the text to the front-end. Suggested writing model: claude-sonnet-4-6. 2. Content moderation — screen user input BEFORE the model call and model output AFTER it. Block sexually explicit content and gratuitous graphic gore. Use a inexpensive-model screen (e.g. Haiku) or a third-party moderation API. Log violations; support a warn-then-suspend flow. 3. Auth — your recommendation (Supabase or Firebase preferred). Email + password baseline; Google sign-in if low effort. 4. Database — persist each user's stories (title, genre, full message history, timestamps), characters, and notes. The front-end already models these data shapes. The story's full saved history must be sent with each AI request (this powers in-story continuity). 5. Subscriptions (Stripe) — $10/month, ~$27/quarter, ~$96/year. Free tier: 10 messages per day (make this a config value), resetting every 24h. Gate writing access by subscription status / remaining free allowance. Handle the subscription lifecycle via webhooks. 6. Age-gate persistence — the front-end collects date of birth + an 18+ affirmation; store the affirmation timestamp with the account. Structure it so a third-party age-verification provider can be swapped in later without reworking the flow. I'm open to building on a proven starter/template (e.g. the Vercel AI chatbot template) if it speeds things up — adapting solid existing code is welcome. DELIVERABLES - Deployed, working app (provided front-end + your backend) on my Vercel, repo on my GitHub - All secrets configured as environment variables (never in client code) - Short handoff notes: key rotation, where moderation logs live, how to change config values WHAT I PROVIDE - Complete front-end code, a written backend brief, and the system prompt (shared privately with the selected freelancer) - All accounts (GitHub, Vercel, Stripe, Anthropic) already created and ready TO APPLY, PLEASE ANSWER THESE IN YOUR PROPOSAL: 1. Have you wired Stripe subscriptions with webhooks before? Link or example. 2. How will you keep the API key off the client? 3. How would you implement input + output moderation cost-effectively? 4. Have you deployed serverless APIs on Vercel? 5. Your fixed quote and timeline for this scope. Proposals that don't answer these questions will not be considered.

We are looking for an experienced Full Stack Developer to help build and enhance a custom business web application with admin dashboard functionality, user management, API integrations, database-driven features, and a modern responsive frontend. This is not a SaaS project. The application is a custom internal/business platform designed to improve operations, manage users, organize data, connect third-party services, and provide a clean dashboard experience for internal teams and business users. The ideal developer should be comfortable working across the full stack, from frontend UI development to backend API architecture, database structure, authentication, role-based access, third-party integrations, and deployment support. Key responsibilities include: • Build and improve custom web application features • Develop clean, responsive frontend interfaces • Create and enhance admin dashboard functionality • Implement user management and role-based access control • Build secure backend APIs and database-driven workflows • Connect third-party APIs and business tools • Create forms, filters, tables, reports, and dashboard views • Improve application performance and user experience • Work with authentication, authorization, and protected routes • Support deployment and final project handoff • Document completed work and technical decisions Required skills: • Full Stack Development • Web Application Development • React.js • Next.js • Node.js • Express.js • TypeScript • JavaScript • REST API Development • API Integration • Admin Dashboard Development • User Management • Role-Based Access Control • Database Management • PostgreSQL / MongoDB / MySQL • Responsive Web Design • Git / GitHub Nice to have: • Experience building business management platforms • Experience with internal tools and admin dashboards • Experience with CRM, payment, email, or third-party integrations • Experience with AWS, Docker, CI/CD, or deployment workflows • Strong understanding of clean, scalable application architecture • Ability to work independently and provide clear progress updates Project expectations: We are looking for someone who can take ownership of assigned features, understand business requirements, and deliver clean, maintainable, production-ready work. The right developer should be able to think beyond individual tasks and help suggest better ways to structure features, improve workflows, and create a more reliable application. This project may include ongoing work if the initial collaboration goes well, including additional features, dashboard improvements, API integrations, automation workflows, and long-term application enhancements. To apply, please include: - Your experience with custom web applications - Examples of admin dashboards or internal tools you have built - Your strongest frontend and backend stack - Your experience with API integrations - Your availability this week We are looking to start soon and would prefer someone who can communicate clearly, work independently, and deliver high-quality full stack development work.

I am looking for a web app developer to build a phase-1 MVP for a consumer finance tool focused on helping people understand loan deals, negative equity, total interest paid, and optional warranty/service-contract costs before they sign paperwork. This is a privacy-first tool. Version 1 is manual-entry only. I do not want bank-account connections, lender logins, or anything that requires users to link financial accounts. The main goal is simple: a person types in the numbers from a real loan or sales deal and the app helps them understand whether the deal is fair, risky, upside down, or hiding extra cost. The app should also include a second section for optional warranties or service contracts. The user should be able to enter the warranty price, term, mileage limit, deductible, and paste contract language into the app so it can surface possible red flags, limitations, payout caps, exclusions, likely pros, likely cons, and questions to ask before signing. What I need built in Phase 1 I need a clean, mobile-friendly web app MVP that includes the following core features: • Input fields for loan amount, APR, term, payment frequency, extra payment, current asset value, credit score, offered rate, and optional early payoff penalty details. • Output showing estimated payment, total interest, total paid, payoff timeline, equity position, and a simple risk or “worth it” style verdict. • A contract-mismatch or deal-check feature that helps identify when payment, APR, term, and total cost do not appear to reconcile cleanly and may require more questions. • A warranty/service-contract section with manual inputs plus pasted text review for likely exclusions, limits, pre-existing-condition issues, vehicle-value caps, deductible concerns, cancellation language, and other warning signs. • Responsive design that works well on desktop and mobile. Phase 2 ideas, not required now These are not part of the initial MVP quote, but I may want them later: • OCR or photo upload for extracting contract details from paperwork • User accounts and saved sessions • Admin editing tools • Apple App Store / Google Play packaging • More advanced AI-assisted document review What I need from the developer I want a developer who can help keep this first version simple, practical, and launchable. Please recommend the simplest reliable stack for Phase 1 MVP development. The developer must be comfortable with the following: • Working in a client-owned repository and client-owned accounts • Building with milestone-based delivery • Providing clean handoff documentation • Delivering source code and full ownership of all work product • Signing NDA and contractor/IP assignment agreement before full project start Proposal requirements Please answer all of the following in your proposal: 1. Have you built any calculators, fintech tools, decision tools, or contract-review style web apps before? 2. What tech stack would you use for this MVP and why? 3. How long do you think Phase 1 would take? 4. How would you break the project into milestones? 5. Are you comfortable working in a repository and accounts owned by me? 6. Can you share one or two relevant examples only? 7. What would you simplify in Phase 1 to launch faster without losing the main value? Budget and scope This is a fixed-price Phase 1 MVP project, not a full enterprise platform. I am looking for someone who understands how to scope an MVP properly, ship a strong first version, and leave room for future phases. To confirm you read the full post, start your proposal with: manual-first MVP

I’m looking for an experienced U.S.-based Full Stack React Developer to help build a modern sports platform for high school athletics. The backend and database have already been started in Base44. I need someone who can improve the frontend, clean up the data architecture, and help scale the project. This is a long-term opportunity. Ideally, I’d like someone who can become the lead developer as the project grows.

We are seeking an elite, senior-level Full-Stack Developerto engineer a high-velocity, real-time horse racing web platform from the ground up. The core application loop revolves around a fast-paced snake draft for individual horse races, complete with an integrated, synchronized sub-second live video stream of the race. Following official track results, the platform automatically executes structured financial payouts to users using Venmo/PayPal Payout rails. The entire tech stack must be built utilizing a unified all-JavaScript environment (MERN stack) optimized to eliminate database race conditions and handle volatile real-time traffic spikes. Core Key Milestones & Project Deliverables: Milestone 1: Backend Infrastructure & User Security (15%) Set up a Node.js/Express.js application environment and establish a scalable MongoDB Atlas architecture. Implement user registration, secure JWT/bcrypt authentication, profile management, and verified phone-number registration and/or email registration. Milestone 2: Sports Data Ingestion & Automation (25%) Establish integration with a third-party commercial horse racing API (e.g., Equibase or Sportradar). Build persistent background workers (using BullMQ, Redis, or Node-Cron) to automatically ingest daily race cards, scratches, gate changes, and final official race metrics. Milestone 3: Real-Time Draft & WebRTC Video Integration (40%) Develop an interactive React.js draft dashboard utilizing Socket.io for live, synchronized state management. Implement our custom mathematical snake draft logic featuring a strict 20-second user-pick countdown timer. Build server-side automatic timeout handlers to auto-assign choices if a user disconnects or freezes. Embed an ultra-low latency HTML5 video canvas layer leveraging WebRTC (via WHIP/WHEP protocols) to ingest an RTMP stream from a media server (e.g., Ant Media or Wowza) ensuring sub-500ms video playback. Milestone 4: Venmo Payout Integration & Compliance Guardrails (20%) Seamlessly integrate the official PayPal/Venmo Payouts API to programmatically distribute money from our platform wallet directly to users' accounts and/or phone numbers. This can be worked around using a p2p format, if necessary due to compliance and regulation. Code a reliable system ledger that deducts a custom platform percentage rake prior to finalizing winner distributions. Implement an IP geo-fencing gateway (such as MaxMind GeoIP2) to block real-money contest entry from illegal jurisdictions. Technical Stack Requirements: Frontend: React.js (Next.js preferred), Tailwind CSS, Socket.io-client. Backend: Node.js, Express.js, Socket.io, Node-Cron or BullMQ.Database & Memory: MongoDB (Mongoose), Redis (for lightning-fast leaderboard and timer caching). Streaming Protocols: WebRTC, WHIP/WHEP, RTMP stream handling. Integrations: PayPal/Venmo Payouts SDK, REST/JSON Sports Data APIs, GeoIP lookup utilities. Strict Operational Code Quality Terms: 1. Repository Ownership: All codebase code and architectural modules must be pushed to our private company GitHub repository at least three times a week. Milestone releases will only be approved after clean local compilation and inspection. 2. IP Assignment: By applying for and accepting this position, you acknowledge that 100% of the developed application logic, system schemas, and code components represent a dedicated Work-for-Hire owned exclusively by the client. 3. ACID Database Transactions: You must guarantee and demonstrate via unit testing that the MongoDB schema handles marketplace swaps and concurrent drafting selections via absolute ACID Transaction Sessions to totally prevent double-spend or double-draft race conditions. To Apply, Please Answer the Following 3 Screening Questions: 1. How do you plan to structure the server environment and React architecture to keep a 30-second live countdown timer perfectly synced down to the millisecond for 4 or more different players concurrently browsing via WebSockets? 2. Please share a summary or a live link of a project you built from scratch that handled live WebRTC ultra-low-latency video delivery or complex stream handshakes. 3. What is your specific experience with financial ledger architectures? Explain how you intend to protect the MongoDB operations against multi-user transactional conflicts.

We are looking for a U.S.-based senior React/Firebase technical lead or software architect to help review and guide an existing SaaS product to pilot launch. The product is already built and deployed in staging. This is not a greenfield build. We need an experienced technical partner who can inspect the current architecture, review contractor work, identify launch risks, and help sequence the remaining work before pilot. Current stack: * React / TypeScript * Firebase Auth * Firestore * Firebase Storage * Firebase Cloud Functions * Firebase Hosting / GCP * GitHub The app is a multi-tenant SaaS platform with organizations, locations, employees, role-based permissions, training modules, SOPs, communications, request-off workflows, handbook acknowledgements, and admin consoles. We need help with: * Reviewing the existing React/Firebase architecture * Reviewing Firestore rules, Storage rules, Cloud Functions, auth/custom claims, and tenant isolation * Reviewing PRs and contractor work * Advising on remaining pilot-readiness work * Helping sequence frontend cleanup, UX/UI polish, admin console structure, and final security review * Identifying risks before real pilot customers are onboarded Important experience: * React + TypeScript SaaS applications * Firebase Auth / Firestore / Cloud Functions * Multi-tenant architecture * Role-based access control * Security-minded code review * GitHub branch / PR workflow * Ability to explain technical tradeoffs clearly We would like to start with a small paid technical review first. If it is a good fit, this may turn into an ongoing technical lead/advisor role. We are not looking for someone to blindly rebuild the app. We need senior judgment, architecture review, launch-risk identification, and practical guidance.

AI Engineer (RAG & Agentic Workflows). *LLM RESPONSES AUTOMATICALLY AVOIDED* We have already launched a production generative AI product that utilizes a custom Retrieval-Augmented Generation (RAG) architecture. We are now expanding the platform to include CRM intelligence, workflow automation, and agentic AI capabilities. This is **not** a prompt engineering role. Seeking an engineer with deep experience building and deploying production AI systems that combine LLMs with multiple structured and unstructured data sources. You should be comfortable walking into an existing, complex codebase, understanding the current architecture, and improving it. Existing AI Architecture Our current AI architecture consists of: * OpenAI embeddings * Embeddings stored in MongoDB * MongoDB Atlas Vector Search for retrieval * Retrieval from both structured SQL data and unstructured document collections * Existing tool/function-calling architecture **Please do not apply if you have not previously built or maintained production RAG systems using embeddings and vector search.** Experience specifically with **OpenAI embeddings and MongoDB Atlas Vector Search** is highly preferred. CRM Intelligence Layer We are currently building a CRM platform and need the AI to reason over CRM records, including the other records are RAG currently retrieves. You will be responsible for designing and implementing the AI integration layer that enables the LLM to intelligently retrieve and reason over CRM data. This work includes: * Designing AI tools/functions that expose CRM data to the LLM. * Implementing backend tool handlers that retrieve CRM records. * Defining tool schemas and instructions so the AI knows when and how to retrieve CRM information. * Building secure retrieval mechanisms that enforce strict user and organization-level access controls. * Transforming raw CRM records into structured, AI-ready context. The AI will need to reason across: * CRM contacts and organizations * client profiles * Deals and opportunities * Projects * Tasks and reminders * Notes * Email history * SMS and WhatsApp communications * Call transcripts * Meeting summaries * Documents and contracts * Workflow history Agentic AI & Workflow Automation * Build proactive AI agents that generate alerts, recommendations, follow-ups, reports, and suggested next actions. * Design systems capable of reasoning across both structured and unstructured data sources. * Architect and implement multi-step and multi-agent workflows. * Develop workflow intelligence that assists users in completing real-world business tasks. Required Experience * Demonstrated experience building and deploying production AI systems used by real customers. * Experience working with embeddings, vector databases, and retrieval pipelines. * Experience implementing LLM tool/function-calling architectures. * Experience integrating AI systems with business systems such as CRMs, ERPs, or other operational databases. * Experience combining structured and unstructured data within AI applications. * Strong backend engineering and systems architecture experience. * Demonstrated ability to quickly understand and improve existing codebases. * Ability to independently own and deliver complex technical initiatives. Strongly Preferred * Experience with OpenAI embeddings. * Experience with MongoDB Atlas Vector Search. * Experience building agentic AI systems and workflow automation. * Experience designing long-term memory architectures. * Experience building multi-tenant SaaS applications with strict authorization requirements. * Experience implementing evaluation and monitoring pipelines for production AI systems. What We Value * High accountability and ownership. * Strong communication skills. * Product thinking and user empathy. * Ability to understand user workflows before writing code. * Pragmatism and sound engineering judgment. PLEASE DO NOT WASTE OUR TIME IF YOU NOT MEET THE REQUIREMENTS 

We're building multiple AI-powered SaaS products and MVPs using modern technologies. We're looking for an experienced Full Stack Developer to help build new features, fix bugs, improve performance, and ship products quickly. Most tasks are small and focused (typically 4–8 hours each), with the opportunity for long-term collaboration across multiple projects. What You'll Be Working On Typical tasks include: • Building new features with Next.js and NestJS • Working with Supabase (Auth, Database, RLS, Storage, Edge Functions) • Developing AI chat features using OpenAI or other LLM APIs • Integrating Stripe subscriptions and payment flows • Building REST APIs and backend services • Creating responsive UI with Tailwind CSS • Fixing bugs and improving application performance • Refactoring and improving existing code • Reviewing and improving AI-generated code from Cursor, Claude Code, Lovable, or similar tools • Helping launch SaaS products and MVPs quickly Engagement • Small tasks (typically 4–8 hours each) • Ongoing work across multiple projects • Flexible schedule • Async communication • Long-term opportunity for the right developer When Applying Please include: • Your best Next.js + Supabase project • A SaaS or MVP you've built • Your experience with Stripe and AI integrations • Your experience with Cursor, Claude Code, or similar AI tools • Your availability this week What We're Looking For Ideally, you: • Have strong experience with Next.js, NestJS, and TypeScript • Have solid experience with Supabase • Have built SaaS products or MVPs • Have experience integrating Stripe and AI APIs • Can work independently and solve problems efficiently • Write clean, maintainable, and scalable code • Are comfortable using AI coding tools • Communicate clearly and provide regular progress update