Jakub Vrana
Prague, Czechia
Summary
🤩
Rockstar🎓
Top SchoolJakub Vrana is a security-focused senior software engineer with 22 years of experience building high-performance web and developer tools, most recently at Google where he worked across full-stack projects and modernized codebases like Nomulus and Closure Compiler. He began as a PHP web developer and co-authored core PHP documentation—one of only eight current authors of the official PHP Manual—and wrote the book 1001 Tips and Tricks for PHP. A longtime open-source contributor, his work spans backend libraries (libphutil, NotORM), developer tooling (Arcanist, Closure Templates), and web platform tests for Trusted Types. Obsessed with security-by-design and user efficiency, he routinely refactors legacy code for safety and performance while improving developer ergonomics. Based in Prague, he also taught web development at Charles University and has presented at international conferences, blending deep technical craft with practical mentoring.
22 years of coding experience
21 years of employment as a software developer
Master, Master at Charles University
Czech, English, Russian
Stackoverflow
644reputation
61kreached
17answers
3questions
Github Skills (76)
annotations10
testing10
windows10
command-line-interface10
google-closure-library10
refactor10
phpunit10
javas10
cesiumjs10
deadcode10
code-cleanup10
refactoring10
optimization10
javascript10
static-analysis10
Programming languages (18)
Github contributions (5)
phacility/libphutil
Oct 2012 - Feb 2017
A collection of PHP utility classes
Role in this project:
Back-end Developer
Back-end DeveloperContributions:34 commits in 4 years 4 months
Contributions summary:Jakub made significant contributions to the `libphutil` library, focusing primarily on PHP utility classes and related functionalities. Their work included implementing features like supporting Windows-specific operations, such as reading random bytes and fixing console prompt history. The user also introduced new features, such as QueryFuture, which supports various methods for executing queries against MySQL. Furthermore, the user addressed multiple bugs and performed optimizations within the library, showing a strong understanding of the project's underlying architecture.
phpphp-utilityutility-classeslibphutil
vrana/notorm
Apr 2010 - Sep 2014
NotORM - PHP library for simple reading data from the database
Role in this project:Backend Developer
Backend DeveloperContributions:272 commits, 3 PRs, 19 comments in 4 years 5 months
Contributions summary:Jakub contributed to the NotORM PHP library, primarily focusing on optimizing database interaction logic. They refactored and improved the `$table->ref()` method and other components within the `SimpleRel` directory. The changes included modifications to file structure, adjustments to querying logic for better performance, and the creation of an example database structure. Code changes demonstrate improvements in SQL query generation and result set handling.
mysqlphpdatabasephp-libraryorm
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.