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 during Visa's intensive two-week Step Up Bootcamp - our project won the nationwide competition.• 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.• Developed a complex workflow containing calls to several dependent applications by an orchestrator application.

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