Digital Infrastructure Engineer | Applied AI & Production Systems
Building turnkey digital infrastructure from scratch. Edge architectures, serverless backends and precision conversion tracking—built to run fast and bring real business results.
- Frontend & Edge: Astro (Islands Architecture), Tailwind CSS, Vanilla JS / TypeScript, React
- Performance: Sub-100ms response, ~100/100 Core Web Vitals, zero-runtime overhead
- Databases & Storage: Cloudflare D1 (Distributed SQLite), Cloudflare KV, MySQL, SQLite
- Hosting & Routing: Cloudflare Workers, DNS/SSL management, Linux CLI, Fornex / cPanel
- Languages: Python (3.12+ / asyncio), TypeScript, Modern PHP, SQL
- AI & LLM Workflows: Hybrid RAG pipelines, structured schema ingestion (JSON / Pydantic), prompt/context engineering
- Integrations: Telegram API (tg-bots & Telethon), Payment Gateways (LiqPay, NPoshta), custom REST webhooks
- Core Systems: FastAPI, Headless WordPress internals, database migrations, plugin refactoring & security hardening
- Telemetry & Tracking: Google Tag Manager (GTM), GA4 (enhanced data), data layer architecture
- Traffic Optimization: Google Ads (Value-Based Bidding, Smart Bidding, Performance Max, Search)
- SEO: Semantic HTML5,
robots.txt,llms.txt, on-page technical indexing - Assets & Creatives: Custom UI art, responsive asset pipeline management, SERP API data scraping
| Project | Live / Code | Tech Stack | Architectural Focus |
|---|---|---|---|
| med.uz.ua | 🌐 Live Site | Astro • Cloudflare Pages • Tailwind | 100/100 Core Web Vitals, edge-rendered medical platform |
| gram-event-quant | ⚡ Repository | Python • Asyncio • WebSockets | Real-time event-driven research engine with low-latency execution |
| DIkastes.ai | ⚖️ Repository | Python • LLM • RAG Pipeline | LegalTech assistant for statutory analysis & case retrieval(in future) |
| Clinic-App | 🏥 Repository | TypeScript • React • LocalRepo | Modular practice management and clinical record persistence |
| PhP-website | 👁️ Repository | PHP • WordPress • Nginx | Architecture, database migrations & server cache optimization |
- 🇸🇰 Software Engineering (Bc.) — Faculty of Informatics and Information Technologies, Slovak University of Technology in Bratislava (FIIT STU), 2nd year.
- 🇺🇦 Law & International Economic Relations — Uzhhorod National University (UzhNU), 2 year.
- 🇸🇰 FIIT STU Email:
xlenoa@stuba.sk - 🇺🇦 UzhNU Email:
arsenii.leno@uzhnu.edu.ua - ✉️ Personal Email:
lenyoarsen@gmail.com
- 💬 Telegram: @arsenii_leno
- 💼 LinkedIn: linkedin.com/in/arsenii-leno
- 🟢 WhatsApp: +380 99 706 30 03
- 🟣 Viber: +380 99 706 30 03
- 📸 Instagram: @arsenii_leno
- 👥 Facebook: facebook.com/arsenii.leno
- 📑 Notion / Public Hub: Notion Workfolio