Software Engineering skills
System Engineering skills
Two decades of IT experience in many different areas, from
Windows & Linux server
& network administration to frontend/backend web development to mobile and desktop app/software development.
I have built and run a webhosting and a VPN service (Joostwebhost & WifiMask VPN), which included developing the infrastructure, website and iOS & macOS apps with a strong focus on security.
I have an agile mindset - Manifesto for Agile Software Development.
Besides working on longer term development projects I like to spend my free time cycling, reading, playing the guitar and piano or work on my car to keep it on the road.
Projects as a freelancer:
• Implementation of account configuration, CardDAV based contact synchronisation and rebranding of a Linphone based VoIP app (iOS & Android) for a Dutch VoIP provider.
• Investigate and solve a reconnecting bug in a VPN app (iOS & macOS) for a Dutch non-profit organisation
• Bitcoin Lightning Network node installation, management & support.
WifiMask VPN is a fast VPN, ad/malware blocker and SmartDNS in one.
Creating WifiMask VPN involved designing, building, securing & maintaining the Linux server based infrastructure, iOS & macOS app development, front-end & back-end web development.
Through building WifiMask VPN I obtained in-depth knowledge of many different technologies including cryptography, app development, security, fire-walling, load-balancing/failover, automation, monitoring, alerting, logging, webservers, databases, networking and frontend & backend web development.
Joostwebhost sells webhosting, email hosting & domainnames.
Over the years I've implemented many different technologies to keep the customers websites online and fast at all times.
I've gained a lot of experience with webservers, databases, caching, automation, migrations, monitoring, alerting, logging, web development, cryptography, networking, fire-walling, security and load-balancing/failover.
CloudVPS is a leading cloud provider in the Netherlands with a focus on Linux & Windows VPS servers.
I was employee #12, which means I got and took lots of opportunities and responsibilities, I've experienced an exponential learning curve and it was a great stepping stone to starting my own business.
I was tasked with building, maintaining and supporting Linux and Windows server & network configurations and got familiar with many different technologies including virtualization, load-balancing/failover, monitoring, alerting, logging, firewalling, security, webservers, databases, networking, hardware & datacenter infrastructure.
At the end of this invaluable experience I decided it was time for me to take the leap, follow my dream of building my own businesses and work full-time on WifiMask VPN and Joostwebhost, while taking on ocassional freelance assignments.
Through Sogeti I was subcontracted to several clients from a wide range of industries. I got to experience many different technologies within many different environments & teams and took on helpdesk support, test engineering and system administrator roles.