Senior Full-Stack Tech Lead for AI SaaS Platform (Remote)

We are building VYXN.AI — a full AI content generation platform with a web application, Templates, Workflow / Space, dynamic credits/coins pricing, AI provider integrations, Telegram bot and Telegram Mini App. The final goal is not a small prototype. The product should be built in clear stages: 1. Technical Foundation 2. First usable product release 3. Full commercial launch scope The first stage should focus on building a stable technical base, not an over-engineered enterprise system. Core product areas: - Web AI content generation platform - Text module with selectable AI text models - Image / Design generation via external AI APIs - Video generation via external AI APIs - Templates section with visual examples, prompts and user photo upload - Dynamic credits / coins pricing based on provider, model, quality, duration and generation parameters - Generation history - User dashboard - Admin panel - AI provider integration layer - Basic working version of Workflow / Space with node-based UI - Telegram bot - Telegram Mini App - Customer support bot - Multilingual support Important: The platform should be built using existing AI APIs and providers, not by training custom AI models at the first stage. We are looking for a Senior Full-Stack Developer / Tech Lead who can write code, structure the project technically, and help define the right staged development plan. Responsibilities: - Review the full project brief and propose a practical implementation plan - Build or lead the core web application - Implement frontend and backend logic - Integrate external AI generation APIs - Build user dashboard, admin panel, generation history and credits/coins logic - Set up database, storage, deployment and basic monitoring - Help structure AI provider integrations and dynamic pricing - Help define Workflow / Space architecture - Help define Telegram bot / Mini App integration approach - Work with UI/UX designer, Telegram developer, workflow/frontend developer or other specialists if needed Required skills: - React.js / Next.js - TypeScript - Node.js - PostgreSQL - API integrations - SaaS or web platform experience - Backend architecture understanding - Ability to work independently and communicate clearly - Comfortable with fixed milestones and clear acceptance criteria Nice to have: - Redis / BullMQ / queues - AI API integrations - Image or video generation API experience - React Flow or node-based workflow UI experience - AWS / GCP / Cloudflare / S3-compatible storage - Telegram Bot / Telegram Mini App experience - Dynamic pricing, wallet, credits or usage-based billing experience - Admin panels and support tools Project format: - Remote - Contract or full-time possible - Fixed milestones preferred for the first stages - Code must be developed in our GitHub repository - Deployment should be done through project-owned accounts - Long-term cooperation possible if the first stage goes well We are not looking for a large agency. We prefer a strong individual developer or a compact team that can move fast, communicate clearly and build a practical commercial product in stages.