Steven Callister's Email Addresses & Phone Numbers

Head Student System Administrator @ BYU Head Student System Administrator for the BYU IT Major's network. Responsible for maintaining the network and the labs. From July 2010 to September 2012 (2 years 3 months) Resident Assistant @ BYU Housing Services Illustrated leadership and interpersonal skills by mentoring 42 students through their freshman year at BYU. Planned and...

Head Student System Administrator @ BYU Head Student System Administrator for the BYU IT Major's network. Responsible for maintaining the network and the labs. From July 2010 to September 2012 (2 years 3 months) Resident Assistant @ BYU Housing Services Illustrated leadership and interpersonal skills by mentoring 42 students through their freshman year at BYU. Planned and executed bi-monthly informational programs for students living in May Hall. From July 2009 to December 2009 (6 months) Customer Service Representative @ Atlas Communications Resolved Customer Concerns. Coordinated installation and repair of company satellite systems. From January 2006 to July 2006 (7 months) Senior Site Reliability Engineer @ LinkedIn Focusing on automating, optimizing, and scaling LinkedIn's new and improved Social Graph database.- Created Fossor, a plugin-oriented Python tool and library for automating theinvestigation of broken hosts and services which was open sourced and featuredon LinkedIn’s engineering blog- Designed and taught an ongoing bootcamp skills course for new SRE hires atLinkedIn- Created Tachyon, a traffic prediction tool that uses machine learning toautomatically recognize distinct traffic patterns and allow the site to pre-cache theresults of future queries before they are sent (reduced cache miss rate by 68%,lowering latency to 1 ms for predicted calls) From October 2016 to July 2018 (1 year 10 months) Mountain View CaliforniaSite Reliability Engineer @ LinkedIn Focused on automating, optimizing, and scaling LinkedIn's Social Graph database.- Automated LinkedIn's internal Social Graph stack to deploy, organize into clusters,and procure its cache autonomously- Co-authored a patent for software that eliminates garbage collection latency fordistributed systems- Designed and coded Graph-Checker, software which measures and graphs dataquality in a time series for the Social Graph- Helped design a “dark traffic” system for LinkedIn's Social Graph which allows forthe safe testing of new code using duplicated live traffic From May 2013 to October 2016 (3 years 6 months) Mountain View CaliforniaSite Reliability Engineer @ Qualtrics Worked as part of a Site Reliability Engineer team to keep the website and core services highly available. Specialized in deployment automation and alerting.- Designed, built out, and maintained three datacenter co-locations to replace the existing AWS EC2 infrastructure- Heavily automated server deployment and maintenance through Puppet and Python.- Monitored services via Nagios, Graphite, and Ganglia.- Wrote Nagios checks for 3rd party software, in-house software, and hardware.- Worked with the development team to make both the software and hardware scale well.- Participated in a 24/7 on-call rotation. From August 2012 to March 2013 (8 months) Orem UtahStaff Platform Engineer @ Ripple - Wrote an Auth0 plugin for Hashicorp's Vault software to increase authentication security by implementing time-limited credentials which eliminated pre-shared secrets for Auth0- Updated all internal tooling to eliminate pre-shared secrets- Created tool packaging pipelines for Brew/Debian/Alpine which improved distribution of tooling on servers, containers, and laptops- Designed and taught several workshops to train new team members in different tooling and automation libraries- Created reusable testing patterns and pipelines for libraries and tooling which are now used throughout the department Platform Engineer @ Ripple - Created software for standardizing and managing database schema migrations which eliminated inconsistent and error prone hand-editing of databases- Organized and rolled out dynamic time limited credentials for databases which increased security and reliability by eliminating all pre-shared database credentials - Created system for testing Salt development branches which allows coders to quickly iterate when writing and testing Salt code- Wrote Go libraries for internal tooling that improved authentication and interactions with auth0, postgresql, ldap, and Vault From July 2018 to February 2020 (1 year 8 months) San Francisco Bay Area