Hello and welcome to my homepage.
You have managed to find me, and you can now find out who I am. I'm not a native English speaker, so if you discover an error in my text, you can have it.
My name is Sven Erik Matzen - if you know me, drop me an email to sven@matzen.cloud. If you don't know me, you can contact me anyway by that address.
My programming experience contains hardcore C# (alway the current version), much of T-SQL, WCF, WIF, and Linq, also HTML with JavaScript, AJAX, TypeScript, jQuery, Knockout, Angular and CSS, very little "old" C. My portfolio also contains deep experience in Azure, Microsoft CRM, SharePoint, Pen-Testing, some Cryptography and theory of malware analysis.
At the moment, I'm one of the "Chief eXperts" (a "rentable" Software Architect) of SDX AG.
Before that I was the CTO, then the Chief Software Architect of Prodanet GmbH.
I also worked as a Software Architect for "Universal IT-Services GmbH" - the IT subsidiary of a German investment company called Universal Investment GmbH based in Frankfurt am Main.
For six and a half years between 2008 and mid-2014, I was a member of a team of consultants for Web/Windows development, Microsoft based SOA and BI at SDX AG. We were developing solutions for top enterprises in banking, retail, and logistics. At SDX AG I was responsible for the IT infrastructure and the five to seven senior/principal consultants reporting to me. The projects I've done for SDX AG customers include point of sale web-applications for a German bank (member of architecture team), TFS Lab-Setup with Hyper-V-hosts that performs a fully automated build and deployment to virtual test machines and executes automated tests, security reviews, architecture, and technology talks for specific customers and internet facing web applications for fund analysis.
The years from 1997 to the end of 2007 I was working for a small company. There I was responsible for the software development (a distributed team of 7 great software developers), the server and database setup and maintenance. The servers where all Microsoft centric (most Windows 2003 and some Windows 2000 machines). We did use MS SQL Server 2000 in the productive systems and MS SQL Server 2005 for some development systems. Externally we had more than 3500 distinct workstations accessing our application servers - most of them use the applications frequently (more than 1000 distinct PCs per day requesting our services). Also, the request rate was about 200.000 per day and the hit rate per hour was between 1.000 and 25.000 web requests. In all projects, I was involved as an application architect, team leader and/or programmer. We did usually avoid to use prebuild components and had our custom libraries. The projects did contain a web services, "Adobe Flash file" generation, router configuration tools using telnet protocol, a homegrown content management system based on XML and XSL, data conversion and automatic data queries using HTTP, web scanning using bots (more than 60 retail shops have been scanned daily for product and price information - which in some cases involved some anonymization techniques, because of shop owners that wanted to prevent us from getting the information).
My background contains a diploma in biology, some work in biochemistry, development of windows system tools as an independent programmer, hardware, and network installation.
My current private focus is on IT security - containing physical, infrastructure and application security.