TypeScript · React · Next.js · Node.js · Python · AI integrations 📍 Prague, Czech Republic · Remote (CET) · 🟢 Open to roles & contracts

I build products end-to-end — from requirements and architecture through to production deployment. Frontend on React and Next.js, backend on Node.js or Python, AI integrations on top of LLM APIs, deployment on Vercel and Railway.

Most of my commercial work sits in three areas: Telegram automation, AI-integrated dashboards, and data extraction platforms. I've also owned the non-code side — writing technical specs, scoping and pricing projects, and running client communication directly.

Frontend: React · Next.js · TypeScript · JavaScript · Vite · Tailwind · HTML5/CSS3 Backend: Python · Node.js · Express · FastAPI · aiogram · REST · WebSocket · JWT Databases: PostgreSQL · SQLite · MongoDB · Prisma · pgvector AI: OpenAI API · Anthropic Claude · Google Gemini · MCP servers Tools & Deploy: Docker · Vercel · Railway · GitHub Actions · Git · S3

• LeadRadar — Threads lead pipeline: headless scraping, Gemini relevance scoring, Telegram delivery. A Redis-backed BullMQ queue sits between the stages so the system survives crashes, retries cleanly, and never pays twice to score the same text. TypeScript · BullMQ · Redis · Playwright · Gemini

• Remote Jobs Hub — vacancy aggregator over Telegram channels: MTProto collector, LLM extraction into structured fields, semantic deduplication with pgvector, FastAPI backend and a Telegram Mini App. Python · FastAPI · PostgreSQL/pgvector · Alembic

• Wallet Analytics Dashboard — transactions, token flows and balance history for any Ethereum address, built on the Etherscan V2 API. Next.js · TypeScript · Vitest

• crypto-widget — resident desktop widget: a docked pill that expands into a live Binance watchlist with charts and spike alerts. Native window behaviour handled in Rust. Tauri 2 · React 19 · Rust

• Data Room MVP — due-diligence document room: nested folders, PDF upload and preview, instant search, IndexedDB persistence, no backend. React 19 · TypeScript · Zustand · Vitest

• AI Integrator — Landing — bilingual marketing site with 10 live Gemini-backed tool demos, two-tier Upstash rate limiting and validated email capture. Next.js 15 · TypeScript · Tailwind · Framer Motion

More in the repository list: a TON testnet wallet, an AI IDE with a RAG pipeline and NATS-orchestrated agents, and several production Telegram bots.

Team Lead / Full-Stack Developer · Freelance · 2023–2024 Led 4 developers on commercial Telegram bots — code review, architecture decisions, client communication. Shipped production bots with auth, payments and admin panels.

Full-Stack Developer · Freelance · 2022–Present Web apps, dashboards and automation for paying clients. End-to-end delivery from spec to deploy.

I use Claude and Copilot for boilerplate and for moving through unfamiliar APIs. Architecture, review and debugging stay with me. Pick any repository here and I'll walk you through why it's built that way and what I'd change — that's the part worth judging.

• 📧 aleksfialko15@gmail.com
• 💼 LinkedIn: Alex Fialko
• 🌐 Portfolio: portfolio-merseis-projects.vercel.app
• 🕐 CET · 🗣 EN fluent · RU/UA native · CZ basic

Open to remote Full-Stack / AI engineering roles and contract projects.