# 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. I own and run a platform for the European Space Agency that delivers quality reports and data unavailability reports from Earth observation satellites: the code, the data pipelines, CI/CD, 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.