- Senior Ruby on Rails DeveloperUnityaid Pty, Ltd.2014 - PRESENT
- Led development of a crowdfunding web application to successful launch in five months.
- Integrated Stripe Connect and credit card processing on behalf of merchant accounts which also involved support for multiple countries/currencies and refunds processing using Stripe web hooks.
- Created a dashboard to monitor campaign progress and manage contributions.
- Developed and maintained an extensive integration/browser test suite covering major application features and workflows.
- Implemented a responsive UI, which proved to be a breaking point for the application as 66% of visitors are smartphone/tablet users.
Technologies: Ruby on Rails, CoffeeScript, jQuery, Haml, HTML5, Sass, CSS3, Twitter Bootstrap, Sidekiq, PostgreSQL, RSpec, Capybara, Selenium Webdriver, BackboneJS, AWS S3, AWS CloudFront, Redis, Heroku, Twilio API, Facebook API, Twitter API, New Relic - Lead Ruby on Rails DeveloperOK Venue, LLC2011 - 2013
- Created a web application to create/manage events and sell tickets. Managed a successful product launch - hosting of New York SOHO International Film Festival screenings in 2013.
- Implemented a QR code tickets generation mechanism and tickets delivery via email (Postmark API), text message (Twilio API) and picture message (Mogreet API). Created and open sourced a Ruby gem for sending picture messages (MMS) with Mogreet.
- Integrated secure credit card processing with Braintree API using client-side encryption. Integrated ACH payments with Transmodus API, allowing event owners to withdraw ticket sales income.
- Architected and implemented REST micro services and embeddable Rails::Engine modules allowing for white labeling of the product.
- Implemented short URL tracking and analytics allowing event curators to identify the most efficient marketing campaigns, channels, and tastemakers.
- Led development of a web application for activating and managing decoupled debit cards.
Technologies: Ruby on Rails, CoffeeScript, jQuery, Haml, HTML5, Sass, CSS3, Twitter Bootstrap, Delayed::Job, PostgreSQL, MySQL, RSpec, Capybara, Selenium Webdriver, Twilio API, Facebook API, Twitter API, Linode, CloudFlare, New Relic, Airbrake. - Senior Ruby on Rails DeveloperMD Consulting2008 - 2012
- Created a web application for analyzing arbitrary multi-dimensional data using OLAP cubes.
- Developed a customizable dashboard for visualizing and analyzing complex financial data.
- Created custom UI web components using a Raphael JS library.
- Advised on the design and implementation of TextMagic API and Ruby wrapper library for sending text messages.
- Implemented a web scraper for importing and synchronizing job listings from http://nav.no into a Scandinavian job search index.
- Created a Facebook quiz application for Richmond University to help future students to select their major subject based on quiz answers.
Technologies: Ruby on Rails, jRuby, Ruby, CoffeeScript, jQuery, BackboneJS, RaphaelJS, HTML5, Haml, CSS3, Sass, Twitter Bootstrap, OLAP, Pentaho Mondrian - Ruby on Rails DeveloperSmartSites, LLC2009 - 2011
- Created a web application for grading and improving resumes.
- Implemented a scoring and profiling algorithm based on uploaded resume documents.
- Created a Ruby gem and web service hosted on Windows Server for analyzing MS Word documents using Win32 OLE interface.
- Developed a web application for creating online resumes.
Technologies: Ruby on Rails, JavaScript, HTML, CSS, Delayed::Job, CanCan, Haml, Liquid, Airbrake, Capistrano, Shoulda, Factory Girl, Clearance, Paperclip, Nokogiri, Will Paginate. - Ruby on Rails DeveloperNetronix, Inc.2010 - 2010
- Developed a web application for remote monitoring of environmental data (e.g., weather, wind, water quality, temperature, flow, or depth).
- Led the transition of a beta product to production state with its first paying customers.
- Created a multi-threaded Ruby server listening for measurements data sent by remote sensors over Iridium Satellite. The costly satellite bandwidth required development of a custom low-footprint communication protocol over TCP/IP.
- Implemented a customizable dashboard with real-time charts displaying incoming telemetry data.
- Provided a module allowing the user to remotely configure sensors via web interface.
- Implemented alert rules and notification via SMS and/or email (e.g. water depth at node y > x).
Technologies: Ruby on Rails, HTML, Sass, CSS, JavaScript, Highcharts, PrototypeJS, Airbrake, Capistrano, Twilio API - Senior Ruby on Rails DeveloperUmongous, Inc.2009 - 2010
- Developed the back-end of a web application for online surveys.
- Implemented an anti-bot mechanism preventing bots from taking surveys.
- Created a logic and administration interface for demographic surveys.
- Redesigned key database schema entities and ActiveRecord objects for better maintainability.
- Optimized MySQL queries for high-traffic requirements using MySQL slow logs.
Technologies: Ruby on Rails, MySQL, HTML, CSS, JavaScript, jQuery. - J2EE Designer and DeveloperInfovide-Matrix2007 - 2008
- Developed a functional tester in Eclipse RCP for a telecommunication company.
- Implemented a Corba-to-XML and XML-to-Corba object mapper based on XML Schema and IDL files.
- Wrote a mechanism for rendering message input forms in Eclipse RCP based on XML Schema.
- Designed and implemented a web application supporting recruitment workflow (WebSphere Business Modeler, WebSphere Integration Developer, WebSphere Process Server).
- Utilized Agile methods in programming.
Technologies: J2EE, IBM WebSphere Business Modeler, WebSphere Integration Developer, WebSphere Process Server, Eclipse RCP, Eclipse Modeling Framework, XML Schema, Corba - Java Developer in Pricing and WorkflowJ.P. Morgan Chase2006 - 2007
- Developed a complex Eclipse RCP option pricer application in the Equity Exotics and Hybrids department.
- Conducted workflow modelling and implementation in BEA AquaLogic BPM.
- Designed and implemented a client-server application for publishing financial instruments.
- Integrated the client application with an external workflow server.
- Worked in Agile methodology involving daily Scrums.
Technologies: J2EE, Eclipse RCP, jUnit, Spring, BEA AquaLogic BPM, XML, Castor, DOM API - J2EE, PL/SQL DeveloperSyndatis2004 - 2006
- Designed and developed BPM web applications that implement contract/expense workflows for pharmaceutical companies.
- Designed and implemented a module for reconciliation of employee American Express credit cards.
- Designed a relational database.
- Analyzed business workflows and prepared functional and technical specifications in waterfall methodology.
- Organized trainings for new users.
Technologies: PL/SQL, Oracle RDBMS, MS SQL Server, J2EE, Apache Torque/Turbine/Velocity, HTML, CSS, JavaScript
