Jan Slabon
Geschäftsführer at Setasign GmbH & Co. KG
Hannover-Braunschweig-Göttingen-Wolfsburg Region Germany
Summary
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RockstarJan Slabon is an experienced software leader and CEO with 11 years in professional development and over two decades tied to Setasign, where he progressed from company founder to Geschäftsführer. He specializes in PDF technologies and full-stack web basics—PHP, JavaScript, HTML and CSS—and has hands-on expertise modernizing core open-source PDF libraries like FPDI and FPDF. His contributions show deep familiarity with PDF internals and maintainership, migrating multiple library versions and improving parsers, filters and templating layers. Based in the Hannover–Braunschweig–Göttingen–Wolfsburg region, he blends entrepreneurial leadership with low-level backend craftsmanship, often fixing subtle compatibility and structural issues that many higher-level engineers miss.
11 years of coding experience
English
Stackoverflow
4,871reputation
500kreached
234answers
0questions
php
top-5%
pdf
top-1%
Github Skills (17)
maintenance10
integrate10
lib10
pdf10
integrations10
pdf-parsing10
php10
code-cleanup10
pdf-generation10
html6
fpdi6
tcpdf6
mpdf6
fpdf6
laravel6
Programming languages (5)
Github contributions (5)
Setasign/FPDI
May 2017 - Jan 2023
FPDI is a collection of PHP classes facilitating developers to read pages from existing PDF documents and use them as templates in FPDF.
Role in this project:
Backend Developer
Backend DeveloperContributions:28 releases, 3 reviews, 146 commits in 5 years 9 months
Contributions summary:Jan primarily focused on updating the FPDI library to a new version (1.6.2). Their work involved modifications across multiple files including `fpdi.php`, `fpdi_pdf_parser.php`, `pdf_context.php`, `fpdf_tpl.php`, and files within the `filters` directory, indicating a broad understanding of the library's internal workings. These updates likely included bug fixes and improved functionality. The commits also reflect changes in the underlying structures of the PDF library.
pdfpdf-documentsphphtml-to-pdfwkhtmltopdf
Setasign/FPDF
May 2015 - Nov 2022
FPDF is a PHP class which allows to generate PDF files with pure PHP. F from FPDF stands for Free: you may use it for any kind of usage and modify it to suit your needs.
Role in this project:Back-end Developer
Back-end DeveloperContributions:10 releases, 19 commits, 13 PRs in 7 years 7 months
Contributions summary:Jan primarily updated the FPDF library, integrating newer versions (1.7, 1.8, 1.81, 1.82, 1.83, 1.84, and 1.85) into the repository. This involved modifying the core PHP code to reflect changes in the FPDF library, including updates to internal class properties, methods, and the addition of new functionalities. The user also updated the `makefile/makefont.php` and relevant tutorial files to align with the upgraded library versions.
php-classpdfwkhtmltopdfphpmodify
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