Working in Alexa Comms team, handling Alexa video/audio calls across Alexa platform

Working on Amazon Go with focus in image quality improvements

Confidential initiative.

Team lead for the team that owns the front end and middleware tiers for all server products under AWS Marketplace, this website enables software sellers to reach all AWS customers; and enables software buyers to easily discover, purchase and consume software. Deliverables:* Implementation of multi-AMI solutions support, with support for complex topoliges. (2017)* Launch of a brand new buyer expericence for all server products. (2018)* Implementation of new features like custom AMI building. (2018)* Delivered the support of containers products as a new fulfillment option, integrating with ECR and ECS AWS services. (2018)* Maintain high availability while serivng a global customer base.* Reduced operational burden by focusing in a focus in integration testing and data validation.* Leading a team of five engineers, that supports 30k products with a rich set of features.

Creation of custom e­commerce solutions based in Spree and Solidus.● Added support for Braintree Payments to Solidus.● Open source contributions for several gems in the Solidus ecosystem.● Improve performace of ETL operations to import more than 1.5 millionproduct variants using Redis and Sidekiq.Implementation of a web portal and backend ETL pipeline for a call center solution:● Setup a Amazon Redshift cluster as the backend for BI analytics and web portal.● Setup ETL operations for loading and updating data to a Redshift cluster.● Implement frontend using Rails and Angular.js for a rich and dynamic user experience.

Maintenance of a RoR app enabling loans to small and medium business in Latin America countries.Upgrade from Rails 3.1 to Rails 4.2.Improve the overall performance of the application, reducing in 30% theresponse time of the server.Improved test suite of the applicationSetup Continuous Deployment

Teacher Assistant for Programming Languages course in the Computer Science department.

● Develop scalable RoR app for enabling the reservation of transportation to and from airports.● Integration with external web services to get flight information and airlines rewards systems.● Implementation of GPS features using Google Maps API and PostGIS extension.● Unit, Functional and Integration testing using rspec, capybara and jasmine

Software Engineer working for US companies in agile environment. Software Next Door is a third party service provider of software development servicing US organizations from Mexico, and specializing in collaborative software development

Working on a cloud application to allow customers (residential, small, medium and large businesses) to manage and analyze their energy usage.

Building several solutions using a mash of technologies (Rails, Sinatra, MongoDB, Redis, etc)

* Lead Ruby developer: * Led a team consisted of three programmers.* Unit, Functional and Integration testing using rspec, cucumber, capybara and jasmine.* Implemented realtime updates of game results and messages.* Integration of a Comet Stack (RabbitMQ, Redis, Orbited and jQuery) to Rails, using custom jQuery UI widgets to handle the update of views.* Implemented an automatic system for retrieval of results of games:* Continuous deployment to Amazon EC2 servers using capistrano.

* Solo Developer. * Implementation of a CSM solution for a NGO funded by mexican scientists. * Integration of Mediawiki with Rails 2.2. * Single sign-on. * Test Coverage around 90% using rspec, cucumber and webrat.

* Principal Ruby developer: * In charge of 80% of the Rails development.* Led a team consisted of three programmers.* Implementation of a citation index for the SciELO Project, a scientific electronic library.* Implementation of tools for massive insertion of SGML markup data to the DB.* Application of Agile methodologies* Github Source Code: github.com/juanger/scielo-dev/tree/master/ScieloIndex