For teams

Work and results

Since 2004 I've built and run infrastructure and software for organizations that cannot afford downtime. From government systems serving millions of citizens to platforms with tens of thousands of daily users.

Case studies

Due to confidentiality agreements, some project details are anonymized. These case studies demonstrate my approach and results while respecting client agreements.

CKA, CKAD, KCNA and KCSA certified. In this work, I automate what happens often, every change goes through automated quality gates, and a rollback always has to be possible. That principle also shapes the WordPress maintenance I do for business owners: updates run through my own management system, with a copy first, then an automated check, and an automatic rollback if something goes wrong.

Dutch National Police

Government · Private cloud platform

Challenge
Build a greenfield VMware-based private cloud platform with multi-tenant Kubernetes clusters requiring strict security isolation.
Approach
As part of the platform team, designed Kubernetes clusters from scratch. Configured development tools including GitLab. Implemented GitOps with Argo CD. Built observability stack with Grafana, Prometheus, VictoriaMetrics, Loki, and Alertmanager.
Result
Secure, observable platform with proper tenant isolation. Development teams can deploy independently while maintaining security compliance.

Learn more about DevOps consultancy⁠
Royal Schiphol Group

Enterprise · Microservices & Azure infrastructure

Challenge
One of Europe's busiest airports needed to modernize its microservices architecture while optimizing Azure infrastructure and planning migration from Kubernetes to OpenShift.
Approach
As part of the development team, improved PHP microservices for the flight information API (powering the mobile app), parking systems, and push notifications. Managed multiple Elasticsearch clusters including database design and search performance optimization. Integrated Symfony applications with headless CMS. Implemented Infrastructure-as-Code with Terraform. Optimized Kubernetes clusters and developed migration plan to OpenShift.
Result
Improved API response times and search performance. Reliable flight and parking services handling peak travel periods. Elasticsearch clusters optimized for faster queries across multiple departments.
MijnOverheid (Logius)

Government · Citizen portal

Challenge
Platform serving millions of Dutch citizens relied heavily on manual testing, limiting release frequency and increasing regression risk.
Approach
As lead developer, improved and expanded the unit and integration test suite. Implemented Behat (Gherkin) framework enabling functional architects to define application behavior without technical knowledge. Developed integrations with government APIs across the Netherlands. Worked on making the MijnOverheid application cloud-native compatible. Translated functional designs into technical specifications and helped management prioritize the backlog.
Result
Transformed release cycle from manual testing to automated quality gates. Significantly reduced regression bugs caught before production. Platform prepared for cloud-native deployment. Improved collaboration between business and development through clear technical specifications.

Learn more about web development⁠
toot.community

Open source · Social platform

Challenge
Scale a Mastodon instance under viral growth to serve 35,000+ users reliably.
Approach
Designed hybrid Kubernetes architecture: control plane on VMs, worker nodes on bare metal. Deployed Talos Linux for secure, immutable OS. Full GitOps with public Argo CD repository. VictoriaMetrics for observability.
Result
Platform serving 35,000+ users globally at its peak. Infrastructure fully documented and publicly available as reference implementation.

Organizations I've worked for as a DevOps engineer

Areas of expertise

For teams
- Kubernetes and multi-tenant platforms
- Zero-trust security
- CI/CD and GitOps
- High-availability systems
- Custom web applications (Symfony, Laravel, WordPress)
- DevOps consultancy
For business owners
- WordPress maintenance and hosting
- Updates through my own management system: snapshot, check, automatic rollback
- Continuous monitoring
- Email on your own domain (included, also available separately)

Open source

Part of my work is open source, so you can see how I work before we agree on anything.

The entire infrastructure configuration for toot.community is publicly available on GitHub, demonstrating my approach to GitOps, Kubernetes, and infrastructure-as-code.

View more of my work on GitHub: github.com/jorijn⁠

What clients say

Jorijn combines thorough, in-depth technical knowledge with a clear understanding of project goals and what working Cloud Native truly means. That makes him the senior in the team on multiple fronts. We can rely on him: even when we provide little information, the result is good, or we get exactly the feedback we need. One of the important applications in our service portfolio used to cause a fair amount of maintenance overhead and didn't always run well. Since he took on the deployment including the CI/CD pipeline, the application runs stably and its management — including life-cycle management — is almost fully automated and barely takes any time anymore.

Albert WitteveenPolitie
Jorijn knows his craft inside out, builds robust software, and has the rare ability to explain technically complex matters to non-technical stakeholders. We also relied on his expertise when hiring new team members — which helped us bring in excellent colleagues.

Willem van AmelsfoortLogius
Having someone like Jorijn on your team makes things easier on every level. He has a natural authority among colleagues — rooted in both his skills and his calm personality. Refinements, reviews and plannings were always thoroughly prepared. Another standout quality: his ability to make complex topics understandable for people from other disciplines.

Richard SlotLogius