Senior Frontend Engineer | React, Next.js, TypeScript, Node.js | 10+ years experience

Frontend engineer with ten years of experience, working remotely from Slovakia in CET. I take features end to end: interface, API and database.

What I build

Web apps and SaaS in React, Next.js and TypeScript, from the design system to the last loading state. I can own the NestJS or Symfony API and the PostgreSQL schema behind them. Mobile apps in React Native and Expo that share logic with the web, keep working without signal and sign in with Face ID. Online stores on PrestaShop with custom themes and modules, ERP and payment integrations, and migrations from old versions without losing SEO. AI features: text generation and data extraction through OpenAI and Anthropic models, plus MCP servers so a team can use their own app from Claude or ChatGPT.

Recent projects

Canteen, a multi-tenant lunch ordering and dispensing system for company canteens: four front ends (admin, employee web, kiosk, counter terminal) on one NestJS API, PostgreSQL with row-level security, and an offline queue so the counter keeps working without internet.

FyzioDesk, my own SaaS for physiotherapy practices: calendar and online booking, client records with an immutability trigger, exercise plans with video, invoicing, and an MCP server that books appointments without ever reaching medical records.

FirmFlow, a white-label React Native app: offline cache in SQLite, biometric sign-in through the OS keychain, idempotent orders.

PrestaShop stores with custom modules, including a made-to-measure product configurator, ERP sync over XML and FTP, and instalment payments. A performance pass took mobile PageSpeed from about 40 to over 90.

Technologies

React, Next.js, TypeScript, JavaScript, React Native, Expo, Node.js, NestJS, Express, PHP, Symfony, Laravel, PrestaShop, PostgreSQL, MySQL, Redis, RabbitMQ, REST APIs, Tailwind CSS, SCSS, Astro, Docker, Git, CI/CD, Playwright, Vitest, Jest, Core Web Vitals, SEO, accessibility, multi-tenant SaaS, e-commerce, OpenAI API, Anthropic API, MCP.

How I work

Architecture, data model and security decisions are mine and I can explain every one of them. I use AI daily for drafting code, reviews and tests, and nothing ships unread. Short delivery loop: we agree what done means, I ship in small pieces you can see running, and you get a written note on what changed.

Case studies for every project: https://www.pavolrasev.com