John Fortner Email & Phone Number

Atlanta, Georgia, United States

• Contributed to the development of a suite of next-generation payment applications, enabling value-added services while increasing the longevity and maintainability of Visa's solutions.
• Improved code reliability by developing and managing comprehensive regression testing suites, meticulously verifying thousands of specific test cases before each production release.
• Developed Grafana and Splunk dashboards to track metrics and support platform resiliency for several applications.
• Worked in a small team to create a project that uses transaction location data and clustering to identify “deserts” of arbitrary merchant types like grocery stores, healthcare facilities, and more utilizing Visa's APIs.
• Crafted detailed Swagger documentation for multiple brand-new applications to enable integration between services.
• Produced dozens of response cases for a simulator to enable efficient running of hundreds of test cases.

Atlanta, Georgia, United States

• Leading recitation sessions for linear algebra with 30+ students with an emphasis on active collaborative learning.
• Managing grading and office hours for a course of 1000+ students, supporting students’ academic success.

Atlanta, Georgia, United States

• Implemented the Unscented Kalman Filter (UKF) and the Particle Filter (PF) for parameter estimation in the Mitchell-Schaeffer cardiac model.
• Comparing the efficacy of UKF and PF as data assimilation techniques in the MS model.
• Applying PF implementation to estimate parameters in the cardiac action potential model for a zebrafish.

Atlanta, Georgia, United States

• Creating activities to provide review and practice of course material for Differential Equations (Present) and Physics 2 (Fall 2021).
• Hosting collaborative review sessions to facilitate collaboration and active learning, sometimes with 100+ students.
• Serving as a peer mentor to seven other PLUS leaders offering support, conducting observations and feedback meetings, scheduling large sessions, and being a reliable point of contact.
• Facilitating communication between student and professional staff including regular meetings.
• Created substantive detailed keys in LaTeX for over twenty-five problems in multivariable calculus which are distributed by Tutoring & Academic Support as final exam review materials to 200+ students.

Atlanta, Georgia, United States

• Worked on Cybersource, a next-generation payments platform part of Visa Acceptance Solutions.
• Developed artifacts for a next-gen payments platform with Java and XML using agile development practices.
• Constructed validation and mutation rules for JSON request bodies to connect internal to external microservices.
• Wrote scripts for automation of mass Kubernetes deployments, increasing speed of regular deployments ten-fold.

Bachelor'S Degree, Computer Science

Activities and Societies: Marching Band

Bachelor'S Degree, Mathematics

Activities and Societies: Marching Band