Roseller, Jr. Velicaria

Experience

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  UC Merced IT

  Sept 2009 - Dec 2009

  Student Technical Consultant

  • Assists and helps students with computer/ technology related problems. • Manage computer labs. • Help with the audio/ visual equipment and presentation tools used in classrooms.

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  UC Merced Enterprise and Web Applications Team

  Jan 2010 - Aug 2012

  Student Applications Developer

  • Develop web applications for use by the faculty, staff and students of UC Merced.• Debug and maintain currently working applications and extend them to user's needs.• Collaborated and tackled large projects using team scrums, bug tracker systems, knowledge bases and source control.

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  My Little Phonies

  Nov 2011 - Apr 2012

  User Experience, UI, Layout and Design

  • Designed the logo for the My Little Phonies App.• Created mock-ups and layouts for what the app's activities might look like.• Google Maps integration lead.• Learned Android programming within the Mobile App Challenge's events.• Suggested we call ourselves "My Little Phonies."

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  UC Merced

  May 2012 - Aug 2012

  GLADE Database Student Researcher

  • Research on current database algorithms featuring quick result yields with confidence graphs over large datasets.• Increased throughput speeds by at least 3% via reduction of marshalling operations on different merge stages.

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  JD Power and Associates

  Feb 2013 - Jul 2015

  Software Engineer

  • created a component in ExtJS v4.x framework that is purely data-driven which helped in standardizing code needed to load/save its content and any other components derived from it.• tweaked on scaling and extending Apache Solr search engine and the Alfresco Document Management System to increase availability and throughput by 20%.

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  OpenX

  Aug 2015 - Apr 2020

  • created scripts and tools for publisher-side performance analysis that saved 30 minutes or more for sampling time that could have been used to look into a publisher’s niche setup.• implemented an alpha version lightweight client that connects with identity providers and enriches publisher requests with a 4-week implementation KPI.• contributed on both the UI and backend of the identity pilot project that got its first milestone 14 months ahead of the expected timeline.• researched on a potential authorization method that avoids SSO pitfalls and can support a non-hierarchical auth structure. Show less • designed and implemented a 30KB footprint publisher adapter that interfaces with a social media platform which caters to 500 million requests a day. The page impact is at most 100ms on load times.• designed and implemented the first version of a >85% coverage, reusable analytics module for gathering performance KPIs on publisher pages.• designed and set up a build toolchain that reduced the publisher-side code footprint by at most 30% and reduced load times by 20ms.• traced and fixed a years-old memory leak that has been causing page slowdowns for UI. Show less

  • Sr. Software Engineer

    Aug 2018 - Apr 2020

  • Software Engineer -- Full-stack

    Aug 2015 - Aug 2018