Chase Stubblefield

Software Engineer

Mack Weldon•  June 2018 - May 2019

● 12-month contract through Boyle Software, Inc. ● Designed and executed solution for trimming a bloated table of session data. Successfully deleted gigabytes of data from the highly active table without any break in user experience. ● Contributed to team methodologies and best practices for using the Heroku platform for developer and demo environments, resulting in lower operating costs for infrequently-used development resources. ● Tweaked web server concurrency settings for main Rails application to balance memory and CPU usage. Consulted frequently with the team on pros and cons of using forking or threading to achieve concurrency. ● Developed and maintained a lightweight end-to-end testing suite (Capybara/Selenium) for vetting new releases. ● Helped plan the incorporation of an external content management solution Contentful, paving the way for a more distributed architecture.

Software Engineer

Change.org•  November 2011 - November 2014

● Technologies used: ○ Languages: Ruby, Node, HAML, SASS ○ Frameworks/Libraries: Rails 3.2, Resque, Chef, jQuery ○ Testing libraries: RSpec, Capybara, Cucumber ○ Databases: MySQL, Redis, MongoDB ○ Services: Engine Yard, Rackspace, Amazon EC2, NewRelic, MixPanel, OneSky, JIRA ● Developed new features for site with millions of users in several countries ● Monolithic Rails application that transitioned into a microservices architecture using Node ● Focus on test-driven development, pair programming, Agile methodology, and a fast release schedule ● Personal experience in the front-end development, DevOps, and System Architecture teams ● Developed and maintained petition indexing tool, ListMaster, using Redis to intersect sets of integers ● Wrote scripts to scale up and down the test environment, saving thousands in operating cost each month ● Migrated testing system from in-house parallelization scheme to CircleCI, again saving on operating cost

Software Engineer

Piazza•  May 2011 - August 2011

● Very small team for a new product that was already being used by several top universities ● Migrated JSON API from Rails to Jetty (Ruby to Java) for increased performance in anticipation of growth ● Administered EC2 instances for testing new backend ● Implemented new features in Rails application

University of California, Berkeley

Computer Science & Mathematics, BA•  August 2007 - May 2011

● Focus on Operating Systems, Databases, Compilers, Artificial Intelligence, Algorithms, and principles of Software Engineering