Stefan Walraven

Stefan Walraven

Stefan Walraven is a postdoctoral researcher in the iMinds-DistriNet research group of the department of Computer Science at the KU Leuven, and member of the Language technology and Middleware (LantaM) taskforce. His research focuses on both middleware and software engineering in the context of cloud computing. More specifically, his main research interests are adaptive middleware, multi-tenancy, Software as a Service (SaaS), Platform as a Service (PaaS), software product line engineering (SPLE), software architecture, and multi-cloud environments.

He obtained his master of engineering in computer science at the KU Leuven in 2008. His master thesis tackled variability and dynamic customization in AO middleware. In 2014, he received his Ph.D. degree in computer science at the KU Leuven under the supervision of Wouter Joosen. His dissertation presented both a middleware framework and a software engineering method to support the efficient customization of multi-tenant SaaS applications.


Key publications:

  1. Stefan Walraven, Dimitri Van Landuyt, Eddy Truyen, Koen Handekyn, Wouter Joosen, Efficient customization of multi-tenant Software-as-a-Service applications with service lines, The Journal of Systems and Software, volume 91, pages 48-62, 22 January 2014 435075bibtex
  2. Stefan Walraven, Eddy Truyen, Wouter Joosen, A middleware layer for flexible and cost-efficient multi-tenant applications, ACM/IFIP/USENIX 12th International Middleware Conference, volume 7049, pages 370-389, Lisbon, Portugal, 12-16 December 2011 download0 313768bibtex
  3. Stefan Walraven, Eddy Truyen, Wouter Joosen, Comparing PaaS offerings in light of SaaS development, Computing, volume 96, issue 8, pages 669-724, August 2014 download0 413659bibtex
  4. Stefan Walraven, Dimitri Van Landuyt, Ansar Rafique, Bert Lagaisse, Wouter Joosen, PaaSHopper: Policy-driven middleware for multi-PaaS environments, Journal of Internet Services and Applications, volume 6, issue 1, 29 January 2015 download0 470906bibtex
  5. Stefan Walraven, Tanguy Monheim, Eddy Truyen, Wouter Joosen, Towards performance isolation in multi-tenant SaaS applications, Proceedings of the 7th Workshop on Middleware for Next Generation Internet Computing, pages 1-6, Montreal, Canada, 3 December 2012 download0 362186bibtex



Teaching assistant for the following courses:

Coach for the following master theses:

  • "Middleware for heterogeneous, hybrid cloud platforms", together with Bert Lagaisse (2012-2013)
  • "Analysis of management systems for data storage in the cloud", together with Maarten Decat (2011-2012)
  • "Support for implementing portable applications on top of PaaS platforms: A case study with Google App Engine", together with Eddy Truyen (2011-2012)
  • "Middleware support for product line development of multi-tenant SaaS applications" (2011-2012)
  • "Middleware support for performance isolation in multi-tenant SaaS applications" (2011-2012)
  • "A semantic extension to BpelOnRails for automating web service composition", together with Kristof Geebelen (2010-2011)

Contact info