ABOUT THE PROJECT I need to develop a SaaS (MVP) that combines: - Multilogin anti-detect browser (profile management) - Integrated marketplace with automatic delivery - Payment system I am a founder with product experience. I will be present daily with validations and quick feedback. ═══════════════════════════════════════════════════════════ PROFILE I'M LOOKING FOR SENIOR full-stack developer: - Portfolio with SaaS (required) - Python (FastAPI) + React/Next.js - Stripe/API experience - Knowledge of browser automation (Playwright/Puppeteer) - Fluent in Portuguese - Full-time 6-8 hours/day - Clean and documented code ═════════════════════════════════════════════════════════ STACK BACKEND: Python/FastAPI, PostgreSQL, Redis, Celery FRONTEND: Next.js, TypeScript, TailwindCSS PAYMENTS: Stripe + Mercado Pago INFRA: Docker, VPS, Nginx, CI/CD AI: Claude API (fingerprint (generation) ══════════════════════════════════════════════════════════ AI AND OPEN SOURCE ALLOWED Use Cursor, Copilot, ChatGPT, etc. Open source libraries maintained Templates and starter kits allowed We value results > Process What matters: functional code, you understand what it does, documented, secure, and scalable. ═══════════════════════════════════════════════════════════ FEATURES 1. AUTHENTICATION • Login/registration, JWT, password recovery 2. BROWSER PROFILES • Full CRUD (Create, Read, Update ... Proxy Management • Isolated browser opening/closing • Cookie/session persistence 3. MARKETPLACE + AUTOMATIC DELIVERY • Digital product catalog • Stripe/Mercado Pago Checkout • DIFFERENTIAL: Purchased account → profile created automatically • Credentials configured automatically • Real-time notification • Browser opens logged in within 30 seconds • Inventory system + account validation 4. ADMIN PANEL • Metrics (users, GMV, revenue) • Manage users/products/transactions • Logs and basic support 5. REAL-TIME NOTIFICATIONS • WebSockets + toast + Emails ══════════════════════════════════════════════════════════ SCHEDULE (8 WEEKS) S1-2: Setup + Auth + Database S3-4: Profiles + Browser + AI Fingerprint S5-6: Marketplace + Payments + Auto Delivery S7: Admin + Notifications + Polish S8: Deployment + Documentation ════════════════════════════════════════════════════════ ══════════════════════════════════════════════════════════ I PROVIDE API Access (Claude, Stripe) Server for deployment Figma Design Daily Feedback Daily Calls (Discord/Telegram) Quick decisions Autonomy + confidence On-time payments ══════════════════════════════════════════════════════════ IMPORTANT TECHNICAL DETAILS CAMOUFOX INTEGRATION: - Firefox antidetect fork (open source) - Fingerprint injection No JS required - Full profile isolation - You will integrate via Playwright AI FINGERPRINT: - Claude API generates realistic configurations - Based on OS/region/device/platform - Caching for cost savings - Consistency validation (GPU+OS compatible) AUTOMATIC DELIVERY: - Stripe webhook → trigger backend - Backend retrieves account from inventory - Creates profile automatically - Configures encrypted credentials - WebSocket notifies frontend - Manual fallback if missing Inventory ══════════════════════════════════════════════════════════ IMPORTANT Generic proposals = ignored No portfolio = ignored Paid practical test before hiring Seeking partnership 8 Weeks ══════════════════════════════════════════════════════════ WHY WORK ON THIS PROJECT? - Real project with confirmed budget - Present and decisive client (no bureaucracy) - Modern and interesting stack - Cool technical challenge (browser automation + AI) - Punctual payments via Workana - Relevant portfolio at the end - Possibility of paid post-delivery support I'm looking for someone pragmatic who uses the best tools and delivers results. If that's you, let's build something exceptional together! Looking forward to seeing your work! ══════════════════════════════════════════════════════════