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Sebastian Nanek

Sebastian Nanek

London, United Kingdom
Member since December 13, 2013
Sebastian is a seasoned developer who has been crafting true gems with passion since 2008. He has extensive experience both as a team leader and working in a solo environment. He emphasizes maintaining excellent communications with clients.
Sebastian is now available for hire
  • Ruby, 6 years
  • Ruby on Rails (RoR), 6 years
  • PostgreSQL, 6 years
London, United Kingdom
Preferred Environment
Linux, Sublime, Git
The most amazing... I've created is a learning platform guiding users to learn English that is perfect for use in schools.
  • Bootstrapping Entrepreneur
    2013 - PRESENT
    Eduante (
    • Bootstrapped a learning content management SaaS business.
    • Used Lean startup principles for validated learning and searching for product market fit.
    • Engaged in full-stack software development.
    Technologies: Ruby, Ruby on Rails, PostgreSQL, Twitter Bootstrap, HTML, REST
  • Director, Software Development Consultant
    2015 - 2016
    Bytes Matter Limited
    • Provided software design, consulting, development, and auditing services for my clients.
    • Worked mainly with financial clients from the City of London, including major FinTech players.
    • Designed and developed software systems working in distributed environments using state-of-art software development practices.
    • Advised my client on potential ways to improve development processes (i.e. by increasing adoption of Agile/XP development practices).
    • Focused on improving overall team performance, including mentoring less senior team members.
    Technologies: Ruby, Ruby on Rails, PostgreSQL, RabbitMQ, Docker
  • Software Developer, Contractor
    2013 - 2013
    Simply Business
    • Wrote several Puppet recipes to automate application deployment.
    • Extended and refactored an internal data processing application.
    • Developed an internal data de-duplication and management application.
    Technologies: Ruby, Ruby on Rails, MongoDB, Puppet, RabbitMQ, RSpec, Cucumber, PostgreSQL, AWS
  • Contract Applications Developer
    2013 - 2013
    Funding Circle Ltd.
    • Extracted parts of the existing monolithic application into a separate service.
    Technologies: Ruby, Ruby on Rails, PostgreSQL, SOA, Songick::Transport, PHP, Pl/SQL, Grape, REST, RSpec
  • Senior Software Developer
    2012 - 2013
    • Handled day-to-day development and maintenance of a language learning application.
    • Conducted technical interviews with candidates.
    • Refactored the old application for better performance and code quality.
    • Handled minor server administration.
    • Performed technology reviews and data structure design.
    • Tuned performance.
    • Extended usage of caching at various levels of the application stack.
    • Integrated with external services (e.g. text-to-speech generators and payment gateways).
    • Introduced modern software development principles (including team coaching).
    Technologies: Ruby, Ruby on Rails, MySQL, MongoDB, jQuery, Xapian, Redis, Capistrano
  • Ruby Software Developer
    2011 - 2011
    • Wrote several Facebook applications (mainly for sweepstakes/competitions).
    • Created an online marketplace for services related to thermal efficiency.
    • Performed ad-hoc server administration.
    • Prepared quotes and project proposals.
    • Integrated with a payment gateway.
    Technologies: Ruby, Ruby on Rails, PostgreSQL, PostGIS, Sphinx, Facebook API
  • Ruby Software Developer
    2009 - 2010
    • Wrote a computer-aided management system for gastronomy.
    • Wrote and maintained a website for an artistic photography competition.
    • Extended and fixed several issues in the company internal CMS software.
    Technologies: Ruby on Rails, jQuery, MySQL
  • Ruby Software Developer
    2008 - 2009
    • Led a team of two other developers during my last 3 months.
    • Maintained extensive customer contact.
    • Developed a multi-store eCommerce solution.
    • Integrated with external product suppliers.
    • Handled full-stack web development, including database design.
    Technologies: Ruby, Ruby on Rails, PostgreSQL, Prototype, Nginx, SOAP, Nokogiri
  • Booka - Bazar Ksiazek Uzywanych (Development)

    A used books marketplace / classifieds website. I co-managed the website and community for 3 years.

  • Vocabla - language learning app (Development)

    A website for learning English words. Users can translate, collect, memorize, and learn 300+ English words per month! It is the best app for learners, teachers, and schools.

  • Languages
    Ruby, JavaScript, CSS, HTML, C++, C, Prolog
  • Frameworks
    Ruby on Rails (RoR), Sinatra, AngularJS
  • Paradigms
    Agile Software Development, Object-oriented Design (OOD), Microservices, Scrum, Data-driven Programming, Service-oriented Architecture (SOA), REST
  • Platforms
    Linux, Docker, Amazon Web Services (AWS), Heroku
  • Storage
    Redis, PostgreSQL, MongoDB, MySQL, Sphinx Search Engine, Xapian, Elasticsearch, CouchDB
  • Libraries/APIs
    jQuery, jQuery Mobile, Facebook API, jQuery UI, Puppet.js
  • Tools
    SemaphoreCI, Redmine, RabbitMQ, Jekyll, Capistrano, Wercker
  • Other
    Lean Development, Apache Cassandra, Enterprise Integration
  • Master of Science and Bachelor of Engineering degree in Applied Computer Science and System and Software Engineering
    2006 - 2011
    AGH University of Science and Technology - Krakow, Poland
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