Aliaksei Klinchuk
Minsk, Belarus
Summary
🤩
RockstarAliaksei Klinchuk is a seasoned software engineer with 14 years of experience building cross-platform C++ and native apps across Windows, Solaris, Linux, macOS, and iOS. He brings deep expertise in toolchains and IDEs—from Visual Studio and Borland C++ to Sun Studio and Xcode—and strong hands-on skills with MFC, Qt, WIN32 API, STL, XML, Git, Objective‑C, Cocoa, and Swift. Aliaksei has contributed meaningful low-level improvements to the widely used iText Java PDF library, tackling complex font, glyph and Indic script handling as well as GPOS processing and refactoring core systems. Based in Minsk, he combines systems-level thinking with practical implementation, often addressing subtle Unicode and typography edge cases that many engineers overlook.
14 years of coding experience
Japanese, English, Russian
Stackoverflow
12,141reputation
496kreached
340answers
10questions
itext
top-1%
java
top-5%
pdf
top-1%
Github Skills (12)
javas10
pdf10
itext10
font-rendering10
java10
pdf-generation6
html6
algorithm6
css6
fonts6
selenium-webdriver6
html-to-pdf6
Programming languages (10)
Github contributions (5)
itext/itext-java
Feb 2015 - Mar 2022
iText for Java represents the next level of SDKs for developers that want to take advantage of the benefits PDF can bring. Equipped with a better document engine, high and low-level programming capabilities and the ability to create, edit and enhance PDF documents, iText can be a boon to nearly every workflow.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:738 commits, 23 PRs, 17 branches in 7 years 2 months
Contributions summary:Aliaksei implemented and modified several features related to glyphs, Unicode characters, and font processing for the iText PDF library. They contributed to Indic script support by addressing reph repositioning issues, implementing wouldSubstitute functionality, and modifying the substitution operations for better handling within the GlyphLine. Furthermore, the user focused on implementing a ZapfDingbatsNumberList analogue and improved the processing of GPOS lookup format 4. They also refactored code and applied general improvements to the core system.
signature-padpdf-documentssignatureabilitypdf-generation
itext/i7n-pdfinvoice
Jul 2016 - Apr 2018
Contributions:24 commits in 1 year 9 months
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