Ravenbrook Ravenbrook is a software engineering consultancy. Our goal is to increase the value of the software industry to society.

Dr Nick Levine

Senior Consultant.


  • Deep knowledge of Common Lisp based on decades of work;
  • Considerable experience in the analysis and debugging of large Lisp systems;
  • Expert in graph layout and interactive display of complex networks;
  • Expert in rule-based Natural Language Processing systems;
  • Expert in the development of social network analysis software;
  • Good communicator and teacher of Lisp at University level;
  • Working knowledge of Python, C, Java and database systems.


  • 2000-present: Senior Consultant, Ravenbrook Limited. Work has included:
    • long-term social network analysis and graphical display project, routinely processing graphs with thousands of nodes and edges;
    • rule-based NLP text processing engine;
    • Lisp/Java/AMQP/Hessian bindings;
    • various online registration and payment systems, test harnesses, database integration project.
  • Presented tutorials at the International Lisp Conferences in 2002, 2003 and 2005 (and was local chair in 2007);
  • 1999-2001: Senior Lecturer, Department of Computer Science, Anglia Polytechnic University. Taught Common Lisp and the first semester introduction to programming. Assisted in laboratory sessions teaching other languages. Researched the limitations of pure HTML as a vehicle for delivering non-trivial applications; the restrictions inherent in a text-only user interface; design of a fully-indexed search engine.
  • 1999: Tractebel Short contract teaching Allegro Common Lisp
  • 1988-1999: Computer Consultant, Harlequin Limited. Most of this time spent in the Lisp group working in a variety of roles: Lisp language implementation, release engineering, build and source-control systems, treeshaking techniques for application delivery, object systems, usability and presentation, large-scale software integration, software licensing, GUI development. Layout algorithms for non-planar cyclic graphs. Helped review Paul Graham's "ANSI Common Lisp". Later: product manager and technical manager.




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