# Zsolt Varjú

> Zsolt Varjú is a software developer and platform operator based in Prague, building web applications end to end, designing ETL pipelines, and running the production infrastructure behind them.

Software Developer at Serco, Prague. Sole developer and operator of a document search platform on a project for the European Space Agency — the code, the data pipelines, and the servers it runs on.

Every page linked below is server-rendered and needs no JavaScript. The one gap: each project's detailed write-up opens in a modal, so /cv.md is the place to read those in full.

## Start here

- [Full CV (markdown)](https://zsoltvarju.com/cv.md): everything in one file — summary, both roles with responsibilities, all 12 projects in full, skills, certifications, languages, contact.
- [Structured profile (JSON)](https://zsoltvarju.com/profile.json): the same content as data, for parsing rather than reading.
- [Portfolio home page](https://zsoltvarju.com/): the site itself — about, projects, experience, contact, all server-rendered.

## Projects

- [Self-Hosted RAG Search](https://zsoltvarju.com/#projects): A retrieval-augmented search system over a local document collection, built to answer questions with citations, and to stay quiet when the evidence isn't there — Python, Qdrant, bge-m3, LangChain, Docker
- [Coffece (coffece.sk)](https://coffece.sk): A bilingual (SK/EN) marketing and ordering site for an office coffee delivery brand: product pages, FAQ, testimonial carousel, and contact flow, with full SEO metadata — Next.js, TypeScript, TailwindCSS, next-intl, Framer Motion
- [IDT PLUS STAV (idtplusstav.sk)](https://idtplusstav.sk): Complete digital operations for a Slovak diamond drilling and concrete cutting company: a self-hosted marketing website, business email, invoicing configured for Slovak VAT rules, plus paid search and SEO — Next.js, TypeScript, TailwindCSS, MDX
- [B2B Wholesale Ordering Portal](https://zsoltvarju.com/#projects): A private B2B ordering portal implemented for a Slovak fresh-produce wholesaler, now in production. Features tiered customer pricing, a login-only catalog with hidden prices, two-warehouse inventory, decimal quantities for weighted goods, and integrated invoicing — WooCommerce, B2BKing, Stock Locations, SuperFaktúra
- [Lemma: Vocabulary Scanner](https://zsoltvarju.com/#projects): A mobile app that turns a photo of a printed page into vocabulary cards. Point the camera at text, and it pulls out the words worth learning and schedules them for review — React Native, Expo, Vision models, FSRS
- [Personal Infrastructure & Homelab](https://zsoltvarju.com/#projects): A personal VPS and home server run with production habits: private networking, atomic zero-downtime deploys, and a stack of self-hosted services — Linux, Docker, WireGuard, Tailscale, CI/CD
- [Tech Blog — zsoltvarju.dev](https://zsoltvarju.dev): A personal engineering blog in English: software development, self-hosted infrastructure, testing, and AI — every post grounded in something that actually happened — Jekyll, Markdown, RSS, Netlify
- [Multi Photo Cropper](https://zsoltvarju.com/#projects): A personal tool for digitizing family photo albums. Scan several prints at once on a flatbed, and it finds each photo on the sheet, lets you fine-tune the boxes, and exports every crop at full resolution as a ZIP — React, TypeScript, Vite, FastAPI, OpenCV, ONNX Runtime, Docker
- [Municipal Website Migrations](https://zsoltvarju.com/#projects): Content migration and restructuring for five Slovak municipal websites, including bilingual Slovak and Hungarian content — Virgo / GCM Cloud CMS
- [InfoMap SK: Master's Thesis](https://github.com/zsoolti8917/InfoMapSK-frontend): A full-stack application for visualising Slovak open data on an interactive map, built as my master's thesis project. The public site is no longer online; the source remains available — React, Node.js, Express, MongoDB, TailwindCSS
- [Garden Bros Website](https://github.com/zsoolti8917/garden-bros-frontend): A website for a gardening company, built with Next.js, styled with Tailwind CSS, and managed through Strapi CMS. Features responsive design, dynamic content generation, and deployment on Vercel — Next.js, Tailwind CSS, Strapi CMS, Vercel, VPS, Dokku, PostgreSQL
- [Alza Dni Kupónový Filter](https://github.com/zsoolti8917/Alza): A Chrome extension that helps users filter products during Alza Days sales by various coupon codes, making it easier to find the best discounts on Alza.sk — JavaScript, Chrome Extension API, HTML, CSS

## CV downloads

- [CV in English (PDF)](https://zsoltvarju.com/Varju-CV-EN.pdf): the same CV, typeset for print.
- [CV in Slovak (PDF)](https://zsoltvarju.com/Varju-CV-SK.pdf): the same CV, typeset for print.
- [CV in Hungarian (PDF)](https://zsoltvarju.com/Varju-CV-HU.pdf): the same CV, typeset for print.

## Other languages

- [Slovak version of this site](https://zsoltvarju.com/sk): the same content in Slovak. English is the default locale and lives at the root.
- [Hungarian version of this site](https://zsoltvarju.com/hu): the same content in Hungarian. English is the default locale and lives at the root.

## Optional

- [Tech blog](https://zsoltvarju.dev): posts on software development, self-hosted infrastructure, testing and AI. RSS at https://zsoltvarju.dev/feed.xml.
- [LinkedIn](https://www.linkedin.com/in/zsoltvarju/): work history and endorsements.
- [GitHub](https://github.com/zsoolti8917): public repositories, including the source of this site.
- [Email](mailto:dev@zsoltvarju.com): dev@zsoltvarju.com.