Gerardo Sandoval Marín

• Designed and developed complex Ruby on Rails RESTful APIs to support modern web applications and third-party integrations. • Migrated legacy static platforms to modern web applications, introducing secure authentication and tracking capabilities, enhancing user security and engagement. • Led projects to conduct periodic audits, improving Ruby code quality and reducing technical debt, resulting in increased 5% in maintainability score.

• Led a team of 3 engineers and integrated bill payment services with 5 large company clients, including department stores and banks. • Developed a high-traffic RESTful JSON payments API integrated with several third-party web services using Ruby on Rails and AWS, applying solutions like anti-fraud detection, secure authentication, idempotence, and due date and discount prediction. • Led a project to refactor and automate development processes using GitHub Actions, eliminating deployment conflicts.

ComunidadFeliz.com is a finance management software for the administration of buildings and condominiums. • Led the implementation of payment gateways and checkout payment systems for LATAM markets using Ruby on Rails and CoffeeScript. • Contributed to Ruby on Rails applications, applying best practices that optimised code quality and reduced code smells and technical debt.

Quipper offers online learning management systems with video support for students and teachers in many countries. • Developed high-quality web applications using Ruby on Rails and JavaScript, focusing on user experience. • Contributed in the implementation of a payment gateway to support payments from convenience stores in Mexico, enhancing payment accessibility by around 20%.