Full-Stack Developer
I build things that work.
I go from concept to deployed product fast. My core stack is Next.js, React Native, and Express on the web and mobile side, with ESP32 and PlatformIO for IoT firmware. I build things that work at scale, fix them when they break, and harden them until they stop breaking.
Available for freelance projects and long-term contracts. Multilingual across four languages.
Bar website + fully native React Native app (v3.0.0, Expo SDK 54 — not a WebView) with 6 tabs: events, real-time chat, karaoke voting, pub quiz, gallery, admin panel. Live quiz with anti-cheat, push notifications, reservations, loyalty points, happy hour system. 400+ bugs fixed across 20+ audit rounds.
Visit SiteTwo-sided marketplace for non-refundable holiday packages. 14K LOC, 64 source files. Stripe Connect split payments, AI-powered listing generation, role-based auth, production-hardened with 75+ security fixes across 3 independent audit rounds.
Visit SiteVSCode extension for PLC programming. 420K+ LOC across TypeScript, React 18, Python FastAPI, and a Node.js hub. 100+ Function Block Diagram blocks, 30+ HMI widgets, code generation for 10+ microcontroller targets (ESP32, STM32, Arduino, RPi Pico), proxy gateway with 4 protocol drivers, OPC UA method wrappers, AI copilot. 2,721 automated tests across 25 suites. v2.2.0, 30 VSIX builds.
Full business management platform — 56,114 LOC, 147 source files, 160 routes, 25 DB tables. Client pipeline, 47K+ Gmail IMAP sync with auto-linking, 2,300+ expense entries, bill monitoring, Greek tax compliance, cash flow forecasting, ntfy push. ML pipeline (Qwen 2.5 1.5B + LoRA) hits 93% expense-classification accuracy.
Visit SiteFull WMS + production + workforce for an industrial distributor. 63K+ LOC, 31 route files, 29 migrations. 2,700+ items, 24 warehouses, stock tracking with receiving/issuing, BOM editor, production orders with kanban board, inventory counts, barcode label printing, certificate tracking, mobile PWA scanner. Live in production. Russian UI.
Animated video posters built with code. Exported as MP4 for Instagram Reels, Stories, and venue TV screens. Delivered in 24-48 hours.
Custom sites with booking, menus, events, and mobile-first responsive design.
Video posters for Instagram Reels, Stories, and TV screens. Code-generated, fast turnaround.
Full-stack apps with auth, payments, dashboards, and APIs. Production-ready from day one.
Cross-platform with Expo and React Native. iOS and Android from a single codebase.
Custom firmware for ESP32 boards. WiFi, OTA updates, sensors, camera streams, web dashboards.
Inventory management, stock tracking, barcode scanning, production orders, reports. PWA with mobile scanner. Multilingual.
Have a project in mind? Send me a message and I'll get back to you within 24 hours.
Email
tkuchmy@gmail.com
Location
Athens, Greece
Languages
EN / EL / RU / UK