Jeroen Dekkers
Operations Engineer
Nijmegen, Gelderland, Netherlands
Summary
🤩
Rockstar🎓
Top SchoolJeroen Dekkers is an Operations Engineer based in Nijmegen with 15 years of experience building and operating reliable backend systems and developer tooling. He has a strong track record in DevOps and lead engineering roles across public sector and security-focused companies, recently driving OpenKAT vulnerability analysis work and now supporting operations at the Dutch Ministry of Health. As owner of Pyzuka and former lead at Cybersprint, he blends hands-on backend development with operational leadership, incident mitigation, and deployment automation. An active open-source contributor, he has improved core functionality and security integration in projects like the scalable groupware SOGo and the Circus process manager, including work on GnuTLS support and cross-environment compatibility. His academic background in applied mathematics underpins a pragmatic, analytical approach to systems design and troubleshooting. Colleagues rely on him for steady delivery under pressure and for bringing maintainability-focused fixes that quietly reduce long-term technical debt.
15 years of coding experience
11 years of employment as a software developer
VWO N&T and N&G, VWO N&T and N&G at ISW NaaldwijkBachelor of Science Applied Mathematics, Bachelor of Science Applied Mathematics at Delft University of Technology
Stackoverflow
68reputation
3kreached
1answer
0questions
Github Skills (16)
jgroups10
objective-c10
configuration-management10
zeromq10
backend10
back-end-development10
python10
gevent10
testing9
gnutls9
md58
sha8
py2exe6
pyside6
pyqt6
Programming languages (16)
Github contributions (5)
Alinto/sogo
Oct 2012 - Apr 2015
SOGo is a very fast and scalable modern collaboration suite (groupware). It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (IMAP, CalDAV, CardDAV, etc.) and thereby provides native connectivity (without plugins) to many clients such as Microsoft Outlook, Apple iCal, the iPhone, Mozilla Lightning, and a plethora of mobile devices.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:16 commits, 4 PRs in 2 years 6 months
Contributions summary:Jeroen primarily contributed to the SOGo project by addressing configuration, dependency, and testing-related issues. They implemented support for GnuTLS, demonstrating an understanding of cryptographic libraries and secure communication. The user also made several changes to improve code quality and maintainability, including fixing spelling errors and updating build configurations. The commits show a focus on the backend system and core functionalities of the groupware application.
caldavcarddavimapiphonemobile
circus-tent/circus
Dec 2012 - Dec 2012
A Process & Socket Manager built with zmq
Role in this project:Backend Developer
Backend DeveloperContributions:10 commits in 5 days
Contributions summary:Jeroen primarily contributed to the backend of the `circus` project, focusing on bug fixes, improvements, and ensuring compatibility with different environments. They addressed pyflake warnings, optimized code execution by introducing sleeps and removing unnecessary calls, and fixed errors in stream handling and configuration. The contributions also include adapting the project to different dependency setups (PyZMQ/gevent_zeromq) and improvements to signal handling within the context of gevent.
socket
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