Jos Schellevis
Managing Director Shareholder at Deciso Group B.V.
Sommelsdijk, South Holland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJos Schellevis is a experienced telecom and networking technologist and entrepreneur with over 20 years in telecommunications and 11 years of focused industry experience, currently serving as Managing Director and co-owner of Deciso Group and CTO of Deciso BV. He combines strategic leadership for large enterprise clients with hands-on engineering—contributing to OPNsense core GUI and backend, as well as improving its documentation and community support. A cum laude graduate in Information Technology from Rotterdam University of Applied Sciences, he blends consultancy rigor (ASML, Schiphol) with product development of high‑tech soft- and hardware. Known for pragmatic open-source contributions, he moves between UI tweaks and system-level scripting, and quietly influences project roadmaps and user-facing features. Based in Sommelsdijk, he favors practical, cost-conscious solutions that scale across enterprise networks while nurturing community-driven projects.
11 years of coding experience
5 years of employment as a software developer
ing, Information Technology, Telecommunication, ing, Information Technology, Telecommunication at Rotterdam University of Applied SciencesChristiaan Huygensschool MTS
Dutch, English
Github Skills (15)
doc10
markdown10
uid10
php10
javascript10
dashboard10
markdown-it10
windows-gui10
front-end-development10
ui-design10
editing10
opnsense10
documentation10
css9
firewall9
Programming languages (4)
Github contributions (5)
opnsense/docs
Jan 2018 - Mar 2018
OPNsense documentation
Role in this project:
Technical Writer
Technical WriterContributions:10 commits, 8 pushes, 1 branch in 1 month
Contributions summary:Jos's primary contributions focused on refining and expanding the documentation for the OPNsense project. They fixed formatting inconsistencies, corrected linking issues, and escaped special characters to improve the readability and accuracy of the documentation. Additionally, the user added detailed information about community support levels, partnership details, and system settings, enhancing the documentation's completeness. Their work directly supports users in understanding and utilizing the features of OPNsense.
docstringsxapiapi-documentationopnsensemanual
opnsense/core
Dec 2014 - Sep 2015
OPNsense GUI, API and systems backend
Role in this project:Back-end & UI Developer
Back-end & UI DeveloperContributions:191 commits, 136 pushes, 66 comments in 9 months
Contributions summary:Jos contributed to the OPNsense GUI and backend systems. The commits involve modifications to PHP files related to the user interface, including updates to HTML, JavaScript, and CSS files, particularly within the context of dashboard widgets and firewall log summaries. The work includes both functional changes, such as adding a searchbox and improvements to the user interface, and code maintenance such as fixing validation.
netmikoapiproxyipsendpoint-security
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