Pieter Bakker – IT Consultant
Unlock Your Business Potential with Open Source IT Solutions
As an independent consultant, I specialize in leveraging Linux and open source technologies to design, implement and manage solutions that drive digital transformation for organizations of all sizes.

Cost-Effective Solutions
Save money with Open Source alternatives that eliminate licensing fees and reduce vendor lock-in.
Enhanced security
Protect your data with customizable security measures and rapid vulnerability fixes.
Greater Control
Regain ownership of your data and customize applications to fit your unique business needs.
Expert Support
Benefit from 20+ years of experience in Linux and Open Source solutions for seamless implementation.
Understanding Your Challenges!
Navigating Linux and open source solutions can be complex.
Many organizations struggle with getting started due to overwhelming options, while those already using these technologies often face operational and maintenance challenges due to a lack of resources or knowledge.
Companies may also have concerns about whether their software is the right fit, if implementations were executed properly, or if security and backup strategies are adequate.
Larger enterprises with internal IT departments or MSPs may face temporary staffing shortages or expertise gaps, requiring additional support to complete projects successfully.
Does this sound familiar? Contact me to discover how I can help you tackle these challenges!

My Areas of Focus
Consulting
Get an in-depth analysis of your existing business processes paired with objective, vendor-neutral advice. Together, we’ll define a clear strategy to accelerate your digital transformation, fostering innovation and driving growth.
Infrastructure
Leverage my expertise to design, build, secure, and maintain container-based, cloud-agnostic infrastructures. I’ll ensure your business-critical applications run securely in the cloud—whether private, hybrid, or public.
Self-Hosted Apps
Experience digital freedom with self-hosted open source software, offering full privacy protection and control over your data. Easily migrate to other platforms or applications without the risk of vendor lock-in.
Why Work With Me?
Experience, Expertise, and a Client-Centric Approach.
Latest Insights
Advanced Mail Filtering: ClamAV, Neural Networks, Machine Learning
Part 5 of the Building a Modern Mail Server on Debian 13 series Introduction Part 4 established a production-ready mail server with Hall of Fame security status on internet.nl and excellent spam filtering through Rspamd. You now have: This is already a production-ready mail server suitable for most organizations. Part 5 is optional and adds…
Rspamd Spam Filtering for Debian 13 Mail Server
Part 4 of the Building a Modern Mail Server on Debian 13 series Introduction The previous guides in this series established the foundation for a production mail server. Part 2 covered the core mail infrastructure with Postfix, Dovecot 2.4, MariaDB, and PostfixAdmin for web-based management. Part 3 added CrowdSec intrusion detection to protect against attacks….
Fixing Matomo CLI Upgrade Errors After Failed Web Update to 5.6.1
When upgrading Matomo to version 5.6.1 via the web interface, the process fails if Composer is missing. Installing Composer and switching to CLI (console core:update) then triggers fatal PHP errors like Class ‘Piwik\Plugin\Manager’ not found in core/bootstrap.php:59. This happened to me on a production server with PHP 8.1. Symptoms and Root Cause Web upgrade to 5.6.1…



