Education

• December 1997. Ph.D. (soft material science). Roskilde University
• May 1994. M.Sc. (chemistry). University of Copenhagen
• May 1992. B.Sc. (computer science and chemistry). University of Copenhagen
• June 1989. High school. Frederiksværk Gymnasium
• June 1986. Primary/secondary school. Storebjergskolen, Hundested

Experience

• October 2024 - present: Director, CrateDB
• February 2020 - August 2024: Lead engineer, MongoDB
• June 2019 - January 2020: Senior engineer, MongoDB
• January 2012 - May 2019: Member of technical staff, TightDB/Realm
• August 2009 - December 2010: Edifor (freelance), Network Theory Ltd
• January 2005 – December 2011: Self-employed developer, system administrator
• January 2004 – December 2019: Writer (freelance), Audio Media/[Alt om Data]
• February 2004 – December 2004: Developer and technical writer, Medical Insight A/S
• February 2007 – December 2007: External supervisor of students’ projects, TEC (Frederiksberg)
• August 2002 – January 2004: Consultant and software developer, Silex Science/Cortex Consult
• June 2000 – August 2002: Software developer, Netgroup
• January 2000 – June 2000: Field scientist, Ciphergen Biosystems
• June 1999 – December 1999: Civilian service, Neurobiological Research Unit, Rigshospitalet
• April 1998 – June 1999: Computational scientist, Structural Bioinformatics
• February 1998 – April 1998: Civilian service, Royal Danish Library
• December 1994 – December 1997: Ph.D. student, Roskilde University
• September 1993 – December 1993: Teaching assistant (numerical analysis), University of Copenhagen

Projects

• Segfault Handler (April 2018 - present)
  • Maintainer (since v1.1.0) of a small node.js module to help debugging C/C++ extensions
  • git, C++, JavaScript, npm, node.js
• Git Version Control Cookbook, 2nd edition (March 2018 - July 2018)
  • Book about git
  • git, shell scripting
• Realm Data Adapters (October 2017 – November 2019)
  • Development of bridge between Realm and relational databases
  • Shell scripting, node.js, npm, TypeScript, Postgres, SQL Server, git
• Realm JavaScript (August 2017 - present)
  • Development of JavaScript SDK for the Realm database
  • Shell scripting, C++, JavaScript, React Native, node.js, npm, git, CMake
• Realm Java Benchmarks (February 2016 - May 2016)
  • Development of benchmark suite of mobile databases
  • Java, Android, git, Python
• Realm Java (August 2014 - August 2017)
  • Development of Android SDK for Realm database
  • C++, Java, NDK, git, shell scripting
• TightDB Node (February 2012 - January 2014)
  • Development of Node SDK for TightDB database
  • C++, JavaScript, shell scripting, git
• TightDB Python (August 2012 - January 2014)
  • Development of Python SDK for database
  • C++, Python, shell scripting, git
• TightDB PHP (January 2012 - January 2014)
  • Development of PHP SDK for database
  • C++, PHP, shell scripting, git
• XcodeCon (July 2010 – December 2011)
  • Conversion engine for Cool:Gen to EGL
  • Perl, Cool:Gen, EGL, Subversion, shell scripting
• Introduktion til JavaScript (February – May 2010)
  • Authoring a booklet (75 pages) about JavaScript in Danish
  • JavaScript, OpenOffice
• BASE (May 2009 – June 2010)
  • Development of web applications, backup scripts, build management scripts, and framework for Global Software Configuration Management
  • Perl, JavaScript (jQuery, prototype, Dojo), SQL (Oracle), Synergy
• Chemetics (March – December 2009)
  • Development of analysis tools for chemists and biologists in the form of KNIME nodes
  • KNIME, Python, shell, Subversion, Java
• Switch.dk (October 2008 – March 2009)
  • Development of web based self-care solutions, in particular backend components including integration with Oracle based ERP system, DIBS (Danish credit card gateway), PBS (Danish payment gateway), and E-Boks (Danish document archive).
  • PHP, SQL (MySQL, Oracle), Subversion
• GSCM (April 2007 – October 2008)
  • Development of web applications and framework for Global Software Configuration Management including e-learning, release registration and newsticker applications
  • Perl, SQL (Oracle), JavaScript (prototype/scriptaculous), Synergy
• LiSA (September 2006 – April 2007)
  • Maintenance and development of internal chemoinformatic software for registration and data analysis of large compound libraries
  • Delphi, C, Matlab, Python, Subversion
• Pluggable Authentication Modules - the definitive guide to PAM for Linux sysadmins and C developers (March 2006 – December 2006)
  • Authoring a booklet about Pluggable Authentication Modules (PAM)
  • PAM, C, OpenOffice
• EasyViz (February 2004 – December 2004)
  • Design and documentation of high availability architecture and installation at hospitals for image archive and analysis software
  • Shell scripting, Heartbeat (Linux HA), C, CVS
• MPU (April 2003 – August 2003)
  • Development of library and utilities for manipulating Maestro files
  • C, CVS
• Chemetics (February 2003 – April 2003)
  • Development of application for selection of oligo libraries
  • C, CVS
• CAFE (January 2001 – July 2002)
  • Design, development, maintenance and documentation of internet payment system including anti-fraud engine and backend components interfacing payment gateways
  • C, PHP, Perl, SQL (MySQL), CVS
• Linux – Friheden til at vælge (June 1998 – February 1999)
  • Author/editor of a book about Linux
  • DocBook, CVS
• panal (April 1998 – February 1999)
  • Development of software to statistical analysis of proteins
  • Perl, shell scripting
• MDreac (January 1995 – December 1997)
  • Development of parallel software for simulation of large reactive mixtures undergoing phase separation
  • Fortran-77, PVM
• EDCS (February 1996 – August 1997(
  • Development of simulation software for 1-dimensional granular media coupled to thermostats
  • C
• Kinetic Compiler (May 1992 – December 1993)
  • Design and development of domain specific language for simulations and analysis of complex chemical reactions
  • C, make, lex & yacc

Publications

Thesis

• Non-equilibrium Molecular Dynamics: Application to oscillating chemical reactions and inelastic colliding particles. Ph.D. thesis. Roskilde University, 1997.
• Komplekse kemiske reaktionssystemer: Eksperimentelle og teoretiske metoder. Award winning thesis. Co-author: M.P. Ipsen. University of Copenhagen, 1994.
• Chemical waves in reaction-diffusion systems: A numerical study. M.Sc. thesis. University of Copenhagen, 1994.

Scientific papers

• Oscillating chemical reactions and phase separation simulated by molecular dynamics. Journal of Chemical Physics 107, 9406 (1997). Co-authors: E. Praestgaard and S. Toxvaerd.
• Controlling the temperature of one-dimensional systems composed of elastic and inelastic particles. Physical Review E 57, 1929-1938 (1998). Co-authors: E. Praestgaard, S. Toxvaerd, and P. Padilla.

Text books

• Git Version Control Cookbook, 2nd edition. Packt Publishing, 2018. Co-authors: E. Zattin, A. Olsson, and R. Voss.
• Introduktion til JavaScript. Libris, 2010.
• Pluggable Authentication Modules - the definitive guide to PAM for Linux sysadmins and C developers. Packt Publishing, 2007.
• Linux – friheden til at vælge. Co-authors: P. Toft, S.J. Andersen and others. IDG Bøger, 1999; Globe, 2000
• Introduction to Chemical Kinetics. Roskilde University, 1996

Feature articles

• 100+ articles in Alt om DATA (2004 - 2019).
• 10+ articles in DKUUGnyt (2000 - 2010).
• When memmove() fails. Realm blog, 2017.
• Big data excavation with Apache Hadoop. Linux Magazine, 144/2012.
• Backing up portables with Box Backup. Linux Magazine, 88/2008.
• The status of the GNU Fortran project. Linux Weekly News, November, 2005.