Jan Buchar
Senior Software Engineer at Apify
Prague, Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolJan Buchar is a Senior Software Engineer based in Prague with 15 years of experience building backend systems and automation tooling. Currently at Apify, he brings practical expertise in web crawling and scraper infrastructure, contributing notable enhancements to the popular open-source Crawlee library—improving sitemap parsing, crawler state access, and safe global storage usage. His background spans startups and product teams (Iterait, Cognexa), where he focused on reliable, production-grade services and integrations. Trained in software systems (MFF UK), Jan combines solid academic fundamentals with hands-on contributions that reduce side effects and make crawlers more robust in real-world scenarios.
15 years of coding experience
7 years of employment as a software developer
Master's degree, Softwarové systémy, Master's degree, Softwarové systémy at MFF UKGymnázium Joachima Barranda Beroun
Github Skills (14)
crawler10
automation10
typescript10
javascript10
nodejs10
automations10
typescripts10
sitemap10
web-sitemap10
webscraping10
typescript-types10
api8
apim8
api-design8
Programming languages (17)
Github contributions (5)
apify/crawlee
Nov 2023 - Apr 2025
Crawlee—A web scraping and browser automation library for Node.js to build reliable crawlers. In JavaScript and TypeScript. Extract data for AI, LLMs, RAG, or GPTs. Download HTML, PDF, JPG, PNG, and other files from websites. Works with Puppeteer, Playwright, Cheerio, JSDOM, and raw HTTP. Both headful and headless mode. With proxy rotation.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:228 reviews, 57 PRs, 167 pushes in 1 year 5 months
Contributions summary:Jan primarily contributed to the `Crawlee` project by implementing utility features related to sitemap parsing and handling, along with the introduction of a feature to access crawler state, key-value stores, and named datasets within the crawling context. Their work included adding support for plain-text sitemap files and enhancing the `Sitemap` class. Additionally, the user removed unused properties and introduced checking for access to global storage to prevent side effects in the adaptive crawler.
web-crawlercrawlersscrapingcrawlingrpa
Teyras/goated
Jan 2015 - Oct 2016
Contributions:1 release, 24 pushes, 1 tag in 1 year 9 months
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