Hi there! I am Felienne. I am assistant professor at Delft University of Technology, where I research the application of software engineering methods to spreadsheets. On that, I wrote a number of publications and my PhD dissertation. I am regularly asked to speak about my research on conferences.

During my PhD I founded a company called Infotron, which sells a tool called PerfectXL based on techniques I developed to spot errors in spreadsheets. Me, my research and my company have gotten some media coverage over the last years.

One of my biggest passions in life is to share my enthusiasm for programming/tech with others. I teach a bunch of kids LEGO Mindstorms programming every Saturday in a local community center. Furthermore, I am in the board of Devnology, a Dutch developer community that organizes monthly meetings on all things software, from Arduinos to open source and from SmallTalk to storytelling, and I am one of the founders of the Joy of Coding conference, a one day developer conference in Rotterdam.

When I am not coding, blogging or teaching, I am probably dancing Lindy Hop with my beau Rico, out running, watching a movie or playing a (board)game.

Contact details

Postal and visiting address Building 36, Room HB08.310
Mekelweg 4, 2628 CD Delft The Netherlands

Email mail@felienne.com

Want to ask me a quick something? Chat with me on my Klets


On this blog, I share my thoughts on spreadsheets, software engineering, research and life in general, but I also use it to live blog conferences. So far, I have written over 250 live blogs that together have received over 200.000 views. Check out my live footage from the following conferences:

edX Global Forum 2015
CodeMesh 2015

VL/HCC 2015
GTTSE 2015
ICLC 2015
ICSE (2012, 20132014, 2015)
SEMS (2014, 2015)
ACCU 2015
FSE 2014
StrangeLoop 2014
StrataConf (London 20122014)
ICSME (20122013, 2015)
SCAM (20122013)
Benevol 2012
LASER 2012
Eusprig (2012, 2015)


Other places you can find me:


  1. Donald 'Paddy' McCarthy

    I wondered if you could add this story from the BBC to the EuSpRIG list of horrors:

    http://www.bbc.co.uk/news/magazine-22223190 “Reinhart, Rogoff… and Herndon: The student who caught out the profs”


  2. James Hazard

    Hi Felienne,

    I follow Edd’s tweets and am working on a parallel problem — word processing documents. I love your presentation and the notion of “dark matter.” I retweeted and posted a little blurb here — http://commonaccord.wordpress.com/2013/11/15/pigdata-bigdata-order/.


  3. Dale Matt

    This is a real Eye-opener of a website. As a CPA, former neurosciences researcher and current programmer for a major American think tank, spreadsheets are my lifeblood. I had no idea someone took them so seriously! Looking forward to your posts and hoping you’ll be giving a presentation soon in Southern California.

  4. Devanbu

    Hi Felienne. So glad you’re involved in FIRST. My daughter was in a FIRST team (1678) and I credit them with her choosing to major in Engineering!

  5. Don Syme

    Hi Felienne

    This is Don Syme (@dsyme), architect of the F# programming language.

    I understand you’ve been doing some Excel+F# work with BumbleBee? The work looks great.

    In any case, I’m writing partly because the people doing “FCell” (http://fcell.io, @FCellAddIn) – Matt Moloney and Adam Mlocek – were asking if you’d be interested in taking a look at what they’ve been doing.

    Best regards
    Don Syme


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