Logan Raarup, Developer in Kolding, Denmark
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Logan Raarup

Verified Expert  in Engineering

Software Developer

Kolding, Denmark
Toptal Member Since
August 27, 2015

Logan is a full-stack engineer who has been developing web applications for more than 14 years. He has worked with a wide variety of organizations, ranging from startups to large corporations, on projects that required knowledge about web applications, distributed systems, scientific computing, and embedded software. Nowadays, his primary tools are Node.js, Meteor, Ruby on Rails, Python, and PHP.


TraceAd Analytics
JavaScript, Python, MongoDB, Ruby on Rails (RoR), Ruby, MySQL, PHP
LM Wind Power
Oracle, C#, NumPy, Flask, Python, Boost, C++
MongoDB, PostgreSQL, Ruby on Rails (RoR), Ruby, PHP




Preferred Environment

Vagrant, Git, Vim Text Editor, Linux, MacOS

The most amazing...

...thing I've achieved through software automation is reducing the time-to-market of wind turbine blades by several weeks.

Work Experience


2014 - 2015
TraceAd Analytics
  • Improved real-time analytics performance using MongoDB MapReduce.
  • Successfully rebuilt the platform on Amazon Web Services, using EC2, ELB, S3, RDS, and ElastiCache to increase availability and reduce costs.
  • Implemented a connectivity platform in Ruby on Rails.
  • Optimized performance to achieve <15ms average response time and handle >1000 rps.
  • Implemented a pattern recognition algorithm for allowing the end user to design URL rules without typing.
Technologies: JavaScript, Python, MongoDB, Ruby on Rails (RoR), Ruby, MySQL, PHP

Structural Design Engineer

2010 - 2014
LM Wind Power
  • Reduced errors and improved time-to-market by automating wind turbine blade design processes and reporting.
  • Increased transparency and understanding of manufacturing processes by implementing a 3D visualization tool in C++/OpenGL.
  • Designed and built a collaborative design and documentation platform and REST API using Oracle/C++/Python.
  • Implemented and deployed embedded software for real-time processing of sensor data.
  • Built and open sourced a C++ REST client for mapping APIs to an object model.
Technologies: Oracle, C#, NumPy, Flask, Python, Boost, C++

Software Engineer

2006 - 2010
  • Built marketing-specialized CMS for a startup.
  • Built custom applications for various clients.
  • Created a social platform and photo sharing service for cooking hobbyists with geo-indexing.
  • Delivered lots of client websites built with a simple and intuitive custom CMS.
  • Developed an order-management platform for a startup.
Technologies: MongoDB, PostgreSQL, Ruby on Rails (RoR), Ruby, PHP

Software Engineer

2005 - 2006
  • Developed an automated domain queueing and registration tool for sunrise periods.
  • Implemented an online ad analytics platform.
  • Implemented internal frameworks for web applications.
  • Maintained an in-house CMS.
  • Integrated web shops with the customer's Axapta system for generating product spec PDFs dynamically.
Technologies: JavaScript, MySQL, PHP

Freelance Software Consultant

2002 - 2005
  • Built a CMS targeted for entertainment industry professionals.
  • Helped build a credit card processing platform.
  • Developed a member management application for political organizations.
  • Maintained a custom CMS for a large-scale website.
  • Implemented a tool for managing and sharing of large assets through WebDAV.
Technologies: PostgreSQL, JavaScript, Perl, PHP


restful_mapper connects business objects and Representational State Transfer (REST) web services. It implements object-relational mapping for REST web services to provide transparent proxying capabilities between a client (using restful_mapper) and a RESTful web service.


Implemented the first library available for automating denormalization of fields in MongoDB (for Ruby).


A Capistrano plugin for deploying to Amazon EC2 instances by security groups.


A simple filesystem-based desktop application deployment for Windows.


JavaScript, Python, PHP, SQL, Ruby, C++, C, Perl, Octave, C#, Visual Basic for Applications (VBA)


Sinatra, Flask, Ruby on Rails (RoR), Ember.js, Boost


REST, Model View Controller (MVC), Model View Viewmodel (MVVM)


Meteor, MacOS, Linux, Oracle, Amazon Web Services (AWS), Docker, Amazon EC2, Heroku


MongoDB, MySQL, Redis, Amazon S3 (AWS S3), PostgreSQL, Memcached


Cython, Game Development


Node.js, NumPy


Adobe Illustrator, Vim Text Editor, Git, Vagrant, MATLAB

2006 - 2010

Bachelor's Degree in Engineering and Computer Science

University of Southern Denmark - Odense, Denmark