We are a small, funded product team taking a live iOS and Android app (React Native) into its most important release. The app is moving from a manual tool to an intelligent, automated daily companion. We are hiring one senior developer to own both the front-end experience and the back-end intelligence layer, and to help us make the key architecture decisions for what comes next. Full product details are shared under NDA. This post is about the bar we need you to clear, so read the application instructions carefully. The One Thing That Matters Most You have personally built and shipped cross-platform mobile apps that real users have in their hands today. Not prototypes, not tutorials, not apps that stalled before launch. We want to see them, use them, and hear exactly what you built. Everything below matters, but nothing matters more than proof that you have taken a mobile app all the way to the App Store and Google Play and kept it running. What You Will Own Front end A polished, animated experience: onboarding flows, sequenced screens, and a completion moment that has to feel premium. We care about craft and detail, not just functional screens. Back end Data modeling, serverless functions, a per-user scheduled notification engine, third-party AI API integration, subscription entitlement logic, and a time-series scoring system. Our current stack runs on Firebase, so you will work in it from day one, but part of your job is to tell us where it should go next. Your first deliverables In your first 1-2 weeks, before heavy building starts, you will: Review our functional spec (FSD) and write the technical spec (TSD) for how you will build it Give us your own build estimate and milestone plan against the October 31, 2026 target. Deliver a written backend recommendation: stay on our current stack, extend it, or migrate. For the backend call, weigh Firebase/Firestore, Postgres (for example Supabase), and other options against our real needs: 10,000+ active users, AI API integration, offline-first sync, reliable push at scale, velocity, and cost. We want an objective read from someone who has shipped on more than one backend, not someone married to a single tool. What You Must Have 3+ years building React Native apps that are live in production on both iOS and Android. Shipped and maintained, not just started. Strong full-stack backend fundamentals: serverless/cloud functions, data modeling, auth, security rules or access control, and API design. Hands-on experience with both a NoSQL database (for example Firestore) and a relational database (Postgres or similar). You should be able to reason about the trade-offs, because you will be advising us on exactly that. Production experience integrating a third-party AI API (Claude, OpenAI, or comparable), including handling latency, cost, and structured output. Proficient in TypeScript. Our codebase is TypeScript. RevenueCat for subscription entitlement management. It is already integrated in our codebase. Push notification infrastructure and scheduled/triggered server logic that runs reliably per user. Clear written English and comfort working async-first over Slack, with GitHub-based code review. Strong Advantage (Not Required) If you have shipped these before, tell us. If not, we expect a strong engineer to pick them up quickly. Firebase at real scale in production: Firestore schema design, Cloud Functions with complex triggers, FCM, and Firebase Auth. UX/UI craft: polished animation work such as SVG stroke animation, radial gradients, and staggered/sequenced motion. Device-native speech-to-text on iOS and Android. Anthropic Claude API specifics: prompt caching, system-prompt engineering, structured output. Experience scaling a consumer or wellness/subscription app to 10,000+ active users. Engagement Time commitment: we expect roughly 20+ hours per week, sustained. This is a real ongoing engagement, not a few hours here and there. Timeline: our v3 release targets October 2026. Expect focused, steady delivery between now and then, with the backend recommendation done in your first few weeks so we can lock the architecture early. Scope: substantial multi-month build with strong potential to continue into v3+ if it is a good fit. We would rather find one reliable partner for the long haul than churn through contractors. Tooling: GitHub, Slack for daily communication, TestFlight for iOS builds. Contract, hourly or fixed-price per sprint. Your preference. Tell us your rate and preferred structure. All builds, schema changes, and deployments are reviewed before release. We commit to a 48-hour feedback turnaround. How to Apply — Read Carefully You must submit a portfolio website or a link to your work before any screening call. Applications without a portfolio link will not be reviewed and will not receive a call. To be considered, include all of the following: A portfolio or work link (required, no exceptions). Applications without one will not be reviewed. One shipped mobile app you are proud of, live on iOS and/or Android, with a store link or video. Tell us specifically what you built. One backend system or serverless function you built. Describe the scale, the data model, and the hardest problem you solved. One example of UI craft or complex interaction, with the visible result (link, video, or GIF). Your one-paragraph read on the backend question: given the needs above, would you stay, extend, or migrate, and why? A confident “it depends, here is how I would decide” is a great answer. A brief note on how you approach scoping and estimating a build like this. We do not expect a number before you have seen the spec, but we want to see how you think about it. Your rate, preferred engagement structure, and realistic start date. How many hours per week you can realistically commit, sustained, between now and an October 31, 2026 v3 target. Be honest. We would rather know your real capacity up front. We respond to every complete application. We are looking for a developer who takes their craft seriously.

Join our team as a Senior Software Engineer to develop and maintain backend services for our project management platform. You'll work with a small team to design, implement, and deploy features, ensuring high performance and reliability. Collaborate with frontend engineers to integrate APIs and support the development of new features. This role requires strong problem-solving skills and the ability to work independently.

We're a high-end minimalist magic mushroom confectionery brand (DTC, no retail) and we need to move fast on a packaging project. We have a full written creative brief ready to go, we're looking to start within the next day or two and have initial concepts back quickly. If you're available now and can turn around concepts fast, we want to talk to you today. Project 1 (start immediately, paid trial): Beta Batch, Limited Release Sticker A one time clearance release SKU- need to develop a label to attach to white packet. Needs its own original visual identity, distinct from our core line, different color palette, different tone, while still subtly connecting back to our brand. Front and back sticker design (2.5" x 3" each). Full written brief ready now: positioning context, color direction, copy. We want 2 to 3 initial directions fast, then we'll move to final art quickly. Timeline: Concepts within 2 to 3 days of kickoff, final files within a week of approval. Please only apply if you can realistically meet this. Project 2 (potential follow-on, scoped later): New SKU, Production/Template Work A new product launching across multiple formats that must match our existing locked brand system exactly. Precise execution work, not new concepting. What we need from you: Strong typography and layout skills, able to originate a new visual direction from a written brief Available to start immediately and turn around fast without sacrificing quality Experience with CPG, food/beverage, or supplement packaging strongly preferred Comfortable asking sharp questions fast rather than slow back and forth To apply, please include: Portfolio examples of packaging or label work, CPG preferred Your hourly rate and your earliest availability to start One line: can you realistically deliver initial concepts within 2 to 3 days

## 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.

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're building a data-driven platform in the beauty/cosmetics space. We've already collected a very large volume of scraped product and brand data, and it's messy - inconsistent formats, duplicates, missing fields, mixed languages, and unreliable values. Your job is to turn that raw data into something clean and reliable, and to build the web application on top of it. This is not a quick gig. We're looking for someone to stay with us for roughly a year and grow with the product. What you'll be doing Building and maintaining a Next.js (App Router) front end and back end Designing and managing our Supabase setup (Postgres schema, RLS policies, auth, storage, edge functions) Cleaning, normalizing, and deduplicating large beauty datasets (this is a major part of the role) Building data pipelines to process and validate incoming scraped data Writing transformation/normalization logic (units, brand names, categories, ingredients, pricing, etc.) Setting up data-quality checks and monitoring Iterating on features with us as the product evolves You should have Strong production experience with Next.js and Supabase (please point to specific projects) Solid SQL/Postgres skills - not just ORMs Real experience cleaning and normalizing large, messy datasets (Python/pandas or similar is a plus) Comfort working with scraped data and all the inconsistencies it brings Good written English and reliable communication Ability to work independently and own your part of the product Nice to have Experience in e-commerce, catalog, or product-data projects Familiarity with data pipelines / ETL tooling Some ML/NLP experience for entity matching or text cleanup Budget We expect this to run around $4,000–$5,000 USD per month depending on experience and hours. This is a long-term commitment, so stability and quality matter more to us than the lowest rate. To apply, please include: Similar past work - links or short descriptions of Next.js + Supabase projects, and at least one data-cleaning/normalization project you've done. Your time zone and your typical available hours - we need to know there's reasonable overlap. Your expected monthly budget within the range above (or your rate if hourly). Applications that don't address all three points will not be considered. A short note on how you'd approach cleaning messy beauty product data is a big plus. We read every proposal carefully and respond quickly to strong candidates. Looking forward to working with you.

We run ads for home improvement companies, and we need someone to be the on-camera face for a roofing client's Facebook video ads. You'll play a company rep. This is NOT a testimonial — you won't pretend to be a customer. Think "friendly employee explaining what we do," not actor doing a commercial. The more natural and conversational it feels, the better it performs. If it looks scripted or salesy, it doesn't work. What you'll film: -3 short scripts (each about 35-45 seconds when spoken) -3 alternate opening lines (hooks) for each script, each just 3-6 seconds long, filmed as separate takes — 12 clips total -All scripts are written and ready. Zero writing on your end. You can use a teleprompter as long as it doesn't look like you're reading. Requirements: -Male, roughly 30-50, comfortable on camera. You should look like someone who could genuinely work for a roofing company. -Ideally wear a plain black polo shirt (no logos - white or grey could work too) -Filmed outdoors in front of a house — a normal, nice-looking residential home. Not an apartment building, not a studio. Ideally with the roof visible in the background, if it looks good. -2-3 different camera positions/angles across the takes so the clips don't all look identical Vertical 9:16, ideally 4K — 1080p works (a newer iPhone is totally fine) -A decent lav mic is required — clean audio, no wind noise. Phone mic audio won't be accepted. -Good natural light, face clearly visible -Fluent, natural American English Deliverables: Raw unedited clips — no editing required on your end. Just organize the footage into 3 folders, one per script, with its hooks inside. Delivered via Dropbox or Google Drive within 7 days of receiving scripts One round of re-takes included if a clip has an audio/framing issue or the delivery misses the mark Budget: $400 flat for the full batch. To apply: If you read this whole post, start your reply with the word "SHINGLES" so we know you did. A link to previous on-camera or UGC work helps but isn't required. If this batch performs, this can become recurring monthly work since we do these often.

I need a full-stack developer to build a simple AI-powered chat assistant. The app should allow users to type a question and receive a response from the ChatGPT API. The UI should be clean, responsive, and built with React and TypeScript. Main Requirements: - Build a simple React + TypeScript frontend - Add a chat input and response area - Connect the app to the ChatGPT/OpenAI API - Show loading state while the AI is responding - Handle basic API errors - Keep the code clean and easy to understand - Provide short setup instructions in a README file

Our website is built on Webflow with Memberstack for authentication and Stripe for membership management. We had a previous contractor work on our member login interface. That work is incomplete and partially non-functional. We need an experienced freelancer to assess what exists, fix what is broken, and complete what is missing, delivering a polished, fully functional member experience that meets a premium consumer-grade health tech standard. The pages are largely designed. We need someone who can refine and polish the existing UI before completing the functional build. What Needs to Be Fixed or Completed The following were contracted but not delivered or are currently broken: 1. Login flow: currently times out on valid credentials and does not authenticate users successfully. Missing items include a Remember Me option and show/hide password icon. 2. Start-Today membership signup page: known missing items include but are not limited to a show/hide icon on the password field, confirm password field, password strength indicator, visible password requirements, inline field-level validation throughout, phone number format validation with country code, name fields restricted to letters only, and a date of birth picker with input mask and 18+ age validation. 3. Overall member authentication flow: sign-up, login, logout, password reset, and email update must be audited end-to-end and confirmed fully functional. 4. Post-registration flow: redirect to Stripe membership and plan selection page after account creation. 5. Memberstack and Stripe accounts linked automatically at sign-up. 6. Member account dashboard: user-facing page to manage profile, view subscription details with live data, update email, and reset password. Currently displays dummy test data and must be connected to live Stripe subscription data. 7. Stripe and Memberstack must be taken out of test mode and confirmed ready for live customer transactions. Current Tech Stack Webflow (front-end and hosting), Memberstack (user authentication), and Stripe (membership and subscription management). You Are the Right Fit If You Have Proven experience completing or fixing Memberstack implementations, not just starting them. A strong portfolio of Webflow, Memberstack, and Stripe integrations (please share examples). Experience building polished, consumer-grade health or wellness product interfaces. Familiarity with premium health tech UX is a strong plus. A systematic approach: assess first, then execute. Clear communication and reliable availability. We have been through a difficult contractor experience and need someone who delivers what they commit to. What to Include in Your Proposal To be considered, please include the following: at least one example of a Memberstack and Webflow project you built or repaired, a brief explanation of how you would approach auditing an existing incomplete Memberstack setup before starting work, your estimated timeline and fixed price for the scope described above, and any questions you have about the project. Project Type: Fixed price Timeline: Looking to start immediately We are U.S.-based and prefer freelancers who are also U.S.-based or who have significant overlap with Eastern Time business hours. Clear English communication is required. We are straightforward to work with, pay on time, and give clear direction. We are looking for someone who takes the same approach.

I have an existing healthcare caregiver application built in Lovable. The frontend is complete and the codebase is stored in a private GitHub repository. I need an experienced developer to migrate the backend from Lovable Cloud to a HIPAA-compliant infrastructure. Requirements: • Experience with HIPAA-compliant healthcare applications • Experience with AWS, Supabase, PostgreSQL, authentication, and secure file storage • Ability to implement Business Associate Agreement (BAA)-eligible infrastructure • Experience with row-level security (RLS), audit logging, encryption, and secure document storage • Ability to work from an existing GitHub repository rather than building from scratch Please provide examples of previous healthcare projects and an estimated cost for migration.