Yan Prysowecki

Full‑Stack Developer | Web3 & AI Specialist | FinTech Expert
I build high‑performance digital products from scratch — from MVP to production. With 5+ years of hands‑on experience in React, Node.js, Rust (Solana), and AI integration (LLMs, RAG, CrewAI agents), I deliver clean, scalable, and secure solutions.
What I offer:
Web3 & Blockchain – Smart contracts (Solana/Rust/Anchor), dApps, SPL tokens, NFT marketplaces, DeFi protocols.
AI & Automation – Custom AI agents, LLM fine‑tuning, RAG pipelines, business process automation (n8n, Zapier, custom code).
Full‑Stack Development – React, Next.js, TypeScript, Node.js, PostgreSQL, Tailwind CSS, real‑time WebSocket systems.
FinTech & Trading Platforms – Matching engines, order books, payment integrations (Apple Pay, Stripe), risk management tools.
Technical Consulting – Architecture reviews, team mentoring, PoC development, CTO‑level advisory.