Dominic Lizarraga

• Consulted with clients on data science projects, translating business needs into technical requirements and implementation plans.
• Used AI agent harnesses to implement, test, and ship app features. 
• Reduced RSpec test suite runtime from 23 mins to 4 mins—an 83% reduction— accelerating development feedback.

• Shipped full-stack Rails features for Collide as the platform scaled from ~20 early users to thousands of users, supporting web, iOS, and Android experiences with Hotwire Native.
• Owned feature requests and production tickets end-to-end, from implementation and automated testing through code review and production release.

• Built and shipped product features for Inkwire, an education platform used by 11,000+ educators across 1,300+ schools and districts, using Rails and Hotwire (Turbo & Stimulus).
• Reduced load times on high-traffic pages by ~80% and improved stability during peak usage, addressing pages that were slow or crash through SQL optimization, background jobs, caching, database indexing, and model refactoring.

• Contributed production features and bug fixes to Ruby for Good open-source CASA volunteer-management platform, supporting 3 regional CASA organizations serving foster youth.
• Delivered 5 merged pull requests using Ruby on Rails, RSpec, JavaScript, and PostgreSQL. PRs submitted

• Shipped full-stack Rails features and resolved production tickets across multiple client applications, taking work from requirements through implementation, testing, and release.
• Built and maintained features for PLT4M, and Haymakers for Hope.

• Responsible for overseeing $35M in annual freight expenses.

• Developed monthly freight spend metrics, led internal meetings on logistics budget.