08/06/2026 updated
60 % partially available
Full-Stack Web Developer – Websites, Web Apps & Business Automation
Ľubica, Slovakia
Only remote
Information Technology, Technical Secondary School Poprad (2020–2024)About me
I'm Andrej, founder of TatraByte in Slovakia. I build custom-coded websites, web apps and automations for small companies — no templates, no page builders. Seven years in IT, the last two building software. I work remote, agree scope and price up front, and hand over deployed and tested.
JavaScriptHTML5Cascading Style Sheets (CSS)Search Engine OptimizationPostgreSQLNode.jsTypeScriptReact.jsCloudflareReact NativeRestful Api
Full-Stack Web Development (JavaScript, TypeScript, React, Astro)
Custom-coded websites and web applications built by hand in HTML, CSS and JavaScript, with React, Astro or React Native applied where a project requires them. Deployments run on Cloudflare Workers and Pages, achieving a perfect 100/100/100/100 score on Google mobile Lighthouse tests.
Cloudflare Platform & Serverless Architecture
Production deployments on Cloudflare Workers and Pages using D1, cron jobs and edge functions. Projects include a request-to-book reservation SaaS and a printer-fleet monitoring SaaS with self-updating agents, all running live for paying clients.
Business Automation & Microsoft 365 / Graph Administration
Automation of Microsoft 365 and Graph administration across multiple organisations, including six schools. API-based integrations connecting invoicing, Microsoft 365 and other business systems, reducing manual overhead for small companies and clinics.
React Native & Mobile App Development
Cross-platform mobile applications built with React Native and Expo on a Supabase backend, including home-screen widgets, push notifications, voice input and offline-first sync with conflict handling. Published on Google Play with 100+ installs.
Technical SEO & Copywriting
Full technical SEO implementation including structured data, metadata and Search Console setup. Copy written together with clients and rewritten from scratch where needed, covering service pages, landing pages and on-page SEO.
Network & Server Administration
Network and server administration for businesses, schools and medical clinics, including IT support and infrastructure setup over seven years of hands-on experience.
Supabase & PostgreSQL
Backend data management using Supabase and Postgres, applied in production SaaS products and mobile applications requiring real-time sync and relational data storage.
UI Design
User interface design for custom websites and web apps, including story-led layouts, galleries, booking flows and brand mark creation, delivered as fully deployed and monitored products.
Git & Version Control
Source code management with Git across all projects, ensuring clean handover of codebases to clients with full ownership of the repository.
Experience
Professional experience5 - 10 years
Freelancer since2026
Languages
EnglishFluentSlovakNative speaker
Project history
Own brand for custom websites, web apps and business automation. Hand-coded business websites on Cloudflare Workers and Pages, a request-to-book reservation system for small guesthouses running on Workers, D1 and cron, React Native apps for Android and iOS, and automations connecting invoicing, Microsoft 365 and other systems over APIs. Fixed scope and price agreed before work starts; every project is handed over deployed, tested and monitored.
Own product: a request-to-book widget guesthouses drop into their own site with one line of code. Features include availability calendar, seasonal pricing, extras, confirmation emails and an owner dashboard. Built on Cloudflare Workers, D1 and cron, multilingual, with GDPR data-processing agreement and cancellation terms. In production for paying clients.
React Native and Expo app on a Supabase backend: one list several people edit at once, home-screen widgets, push notifications, voice input and offline-first sync with conflict handling. Designed, built, shipped and maintained solo. 100+ installs, rated 4.6 from 5 reviews.