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Curriculum Vitae

June 7, 2008

Name: Han-Wen Nienhuys

Sex: Male

Nationality: Dutch

Driving license: yes




Professional interests

Software design and implementation, mathematical modeling techniques, numerical algorithms, linear algebra, music representation, digital typography.


Formal education

PhD, Institute for Information and Computing Sciences, Utrecht University. 2003.

Engineering degree in applied mathematics (MSc equivalent, cum laude). Technical University Eindhoven, 1998. Graduation topic: analysis.


ASCI Course on Visualization and Virtual Reality, 2001. (ASCI is a Dutch graduate school)


Expert in: program design, coding and software engineering.

Programming language experience: C (1991-now), C++ (1996-now), Python (1998-now), Scheme (2000-now), Java (2000-2002) years, Quill (2004; Certified Quintiq Specialist).

Working knowledge of: Unix programming, Emacs, OpenGL, Java3D, Autoconf, Make, HTML, (Fedora) Linux, CVS, darcs, LATEX, METAFONT, Cocoa development, PostScript, Pango, SVG, PDF, LISP, Unicode.

Proficient at: giving presentations, scientific writing, and technical writing.

Languages: Dutch (native), English (fluent, reading and writing), Portuguese (speaking fluently, reasonable reading) German (reasonable reading), French (basic reading).

Work experience

March 2007-present
Software Engineer, at Google Engineering Brazil.

March 2005-August 2006
Freelance consultant, owner of LilyPond Software Design (

April 2004-February 2005
Consultant Advanced Planning & Scheduling and Software Engineer, at Quintiq Applications B.V.

Mar-Jun, 2003
Junior researcher at Utrecht University, Institute of Information and Computing Sciences.

Research assistant/PhD. student at Utrecht University, Institute of Information and Computing Sciences.

Intern at the R&D department of Océ-Nederland B.V., writing software to simulate heat diffusion.

Teaching assistant for undergraduate courses in imperative programming and data structures (1998-2001).

Co-supervised MSc. student thesis-work. (2002 and 2005/2006)

Refereed for Algorithmica, special issue on shape algorithmics (2002), IEEE Transactions on Visualization and Computer Graphics (2004).

Software written

Open source:

LilyPond, automated professional music typography. Design, implementation (80kloc C++, 23kloc Scheme, Python, METAFONT), cooperative development, automated testing, quality assurance, user support, documentation, web-site design, and scientific dissemination.

I am the main author in this team project.

GUB, a cross-compilation environment under Unix for creating and distributing binaries for MacOS, Windows and Unix. Design, implementation, cooperative development, quality assurance. (Python, autotools, darcs, git).

I am one of the two authors.

Salmon, Bazzoen, Artisjokke: interactive finite element simulations for tetrahedral meshes using non-linear elasticity. Design, implementation (C++, OpenGL), and validation. Sole author.

A rewrite of a mark & sweep garbage collector for a Scheme interpreter (C). Accepted into GNU GUILE distribution. Sole author.

Meshugge: cutting in Delaunay triangulations. Design, implementation (C++, OpenGL) and scientific dissemination. Sole author.

Reimplementing Makefile function-calls (C), adding support for $(call) and $(if) functions. Accepted into GNU Make distribution. Sole author.

Rayce: a ray tracer. Design, implementation (C and C++) and documentation. Sole author.

Miscellaneous tools and patches: darcs2git (convert Darcs to git repositories), mftrace (trace Metafont bitmaps into scalable fonts).

Proprietary software:

Quintiq Logistics Planner Industry Solution. (Quill, Quintiq Application Suite)

Adapting a prototype OO model for road-transport to a real world situation, and successful roll-out with a customer. OO Design, performance troubleshooting, customer contact, UI design. Work in cooperation with a Business Consultant.

Waddif: simulation of heat-diffusion in layered media. Design, implementation (C and LINPACK) and validation. Sole author.


Hobbies: French horn, dancing, drawing, cooking, rock climbing,

Extracurricular activities: Fundraiser of the VU-Orkest (Orchestra of the Free University, Amsterdam) 2005/2006. Treasurer (administration and fundraising) of Utrechts Blazers Ensemble (1999-2001).

References available on request.

Past activities


Refereed publications

Han-Wen Nienhuys and Jan Nieuwenhuizen. LilyPond, a system for automated music engraving. Proceedings of XIV Colloquium on Musical Informatics. Firenze, Italy, 2003.

Han-Wen Nienhuys and A. Frank van der Stappen. A Delaunay approach to interactive cutting in triangulated surfaces. Proceedings Workshop on Algorithmic Foundations of Robotics (WAFR). 2002.

Han-Wen Nienhuys and A. Frank van der Stappen. A surgery simulation supporting cuts and finite element deformation. Proceedings Medical Image Computing and Computer Assisted Intervention (MICCAI) 2001.

Han-Wen Nienhuys and A. A computational technique for interactive needle insertions in 3D nonlinear material. Proceedings International Conference on Robotics and Automation (ICRA) 2004.


Han-Wen Nienhuys. Cutting in deformable objects. PhD Thesis, Utrecht University, 2003.

Han-Wen Nienhuys. Convoluties van signalen uit meerdimensionale domeinen. (Convolutions of signals from higher-dimensional domains). Master's thesis, Technical University Eindhoven, 1998.


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