Daniil N.

𝟰𝟱𝟬,𝟬𝟬𝟬+ users on platforms I built. 𝟰𝟯,𝟬𝟬𝟬+ payments and orders processed. $𝟵𝟱,𝟬𝟬𝟬+ a year cut from clients' running costs. I build SaaS MVPs on Next.js, TypeScript and Supabase, and I take over the ones that stalled: apps started in Lovable, Bolt, v0 or Cursor that break once real users arrive. Either way you get a fixed scope, a fixed price and a date. 🔧 𝗔𝗜-𝗕𝗨𝗜𝗟𝗧 𝗠𝗩𝗣 𝗧𝗔𝗞𝗘𝗢𝗩𝗘𝗥 I take over MVPs generated in Lovable, Bolt, v0, Cursor, Claude Code and Replit, and finish them into a product that holds real traffic. Common repairs: auth, roles and permissions rebuilt on top of a working prototype Stripe billing that survives trials, upgrades, proration and failed payments Supabase and Firebase schemas that stopped scaling data leaking between users, lost payments, apps that fall over under load Every takeover starts with a paid 𝘁𝘄𝗼-𝗱𝗮𝘆 assessment of your codebase. You get a written verdict on what is worth keeping, what has to be rewritten, the security and billing holes I found, and a fixed price with a delivery date. The fee goes toward the project if we build together. 🚀 𝗪𝗛𝗘𝗡 𝗬𝗢𝗨 𝗔𝗥𝗘 𝗦𝗧𝗔𝗥𝗧𝗜𝗡𝗚 𝗙𝗥𝗢𝗠 𝗭𝗘𝗥𝗢 Product strategy: feature scope, roadmap for version one, pricing and billing model SaaS platforms: multi-tenant data, subscriptions, usage limits, roles, admin dashboards with analytics and CSV export AI products: multi-LLM pipelines (OpenAI, Claude, Gemini), RAG, semantic search, AI agents, credit-based billing for AI actions Mobile apps: React Native for iOS and Android, including store submission Automation and API integration: REST and GraphQL APIs, Stripe, n8n workflows, Telegram bots, webhooks, Instagram and TikTok publishing Most builds go live in 𝟲-𝟴 𝘄𝗲𝗲𝗸𝘀. ⚙️ 𝗦𝗧𝗔𝗖𝗞 Next.js, React, TypeScript, Tailwind, Node.js, NestJS, Python, PostgreSQL, Prisma, Supabase, Redis, RabbitMQ, ElasticSearch, AWS, Vercel, Docker, Stripe. 📊 𝗪𝗢𝗥𝗞 𝗜 𝗖𝗔𝗡 𝗦𝗛𝗢𝗪 Full case studies with links are in my portfolio below. Postiq - AI SaaS for social media content: text and image generation, content calendar, auto-posting to Instagram, TikTok and Telegram, isolated workspaces per brand, credit system that charges only after a successful AI action. Content preparation time dropped 𝟰𝟬%, running costs dropped 𝟯𝟬%. Screenify - streaming and content aggregation platform: 𝟭.𝟭𝗠 titles, 𝟯𝟱𝟬,𝟬𝟬𝟬 users, 𝟮.𝟳𝗠 sessions a month. Parallel scrapers per source, proxy rotation, deduplication, sharded PostgreSQL, multi-region clusters, HLS player that starts under 𝟮 𝘀𝗲𝗰𝗼𝗻𝗱𝘀. e-crypto - crypto exchange site plus Telegram bot: live rates, rate lock at confirmation, commissions configurable per pair, operator panel for the request queue. It has processed 𝟯𝟮,𝟱𝟴𝟱 exchanges. 🤝 𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞 One developer owns your project end to end, so nothing gets lost between people. I work as a product owner as well, so you also get calls on scope, pricing and what to leave out of version one, based on products I have shipped and watched run. You see a working build 𝗲𝘃𝗲𝗿𝘆 𝘄𝗲𝗲𝗸, you pay by stage, and the repository and accounts stay in your name from 𝗱𝗮𝘆 𝗼𝗻𝗲. After launch I stay available for support. 📩 𝗡𝗘𝗫𝗧 𝗦𝗧𝗘𝗣 Tell me what you have, who it is for, and where it stopped. I will come back with a straight read on whether it is worth saving and what it would take. If it is a fit, tell me a time that suits you and we will get on a call.