Josef Válek
Full Stack Engineer at Apify
Czechia
Summary
🤩
Rockstar🎓
Top SchoolJosef Válek is a Full Stack Engineer with a decade of experience building web and backend systems from Czechia, currently contributing at Apify and developing healthcare software at MedMan. He combines PHP, Python, Node.js and React expertise with practical DevOps and GitLab-driven workflows to deliver resilient, user-focused applications. His open-source work includes improving core URL parsing and edge-case handling in apify/proxy-chain, showing attention to protocol correctness and security around proxying. Comfortable as a freelancer and technical consultant, he pairs hands-on implementation with clear technical guidance. His background in computer science and studies in computational linguistics give him a strong foundation in algorithms and language-aware tooling that informs pragmatic system design.
10 years of coding experience
6 years of employment as a software developer
Magistr (Mgr.) (not finished), Computational Linguistics, Magistr (Mgr.) (not finished), Computational Linguistics at Univerzita Karlova
English, Czech, French, Russian
Github Skills (6)
javascript10
nodejs10
proxy-server10
url-parsing10
testing10
unit-testing9
Programming languages (6)
Github contributions (5)
apify/proxy-chain
Jan 2021 - Apr 2021
Node.js implementation of a proxy server (think Squid) with support for SSL, authentication and upstream proxy chaining.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:2 reviews, 8 commits, 3 PRs in 2 months
Contributions summary:Josef primarily worked on improving the `parseUrl` function within the `proxy-chain` project. Their commits focused on enhancing URL parsing, adding features like handling standard ports and relative URLs, and refining the output to include a scheme. The changes involved modifications to the `test/tools.js` and `src/tools.js` files, indicating a focus on core functionality and ensuring the library's robustness. Furthermore, the user addressed edge cases and clarified documentation.
javascript-libraryproxy-serversslproxyupstream-proxy
valekjo/actor-pipe
Dec 2022 - Dec 2024
Contributions:2 pushes, 1 branch, 7 issues in 1 year 11 months
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