Sandro Israel Hernandez
Full-Stack Developer
Xalapa
Summary
Ruby on Rails developer with 3 years of professional experience participating in the design, development, and maintenance of scalable and secure web applications. Experienced across the full software development lifecycle, from analysis and implementation to deployment and production support. Strong focus on backend development, REST APIs, asynchronous processing, and clean code practices, complemented by hands-on experience in front-end development using HTML, CSS, JavaScript, and React, as well as Rails monolithic applications using Hotwire (Turbo and Stimulus). Comfortable working in agile teams and remote environments, with an emphasis on quality, maintainability, and continuous value delivery.
Overview
2
2
years of professional experience
Work History
Back-end Developer
Manuable
08.2024 - Current
- Development and maintenance of backend features in Ruby on Rails, focused on stability, scalability, and code clarity.
- Implemented a STP payment synchronization system, using Elixir as an intermediary service to consume external APIs, process records, and reliably synchronize data with the Rails platform.
- Integrated PayPal payments (cards and PayPal), reducing transaction fees and improving the payment experience.
- Implemented Sumsub identity verification, reducing user onboarding time from hours to minutes.
- Ongoing collaboration with product and engineering teams during analysis, development, testing, and deployment phases.
Back-end Developer
Saeko
08.2023 - 08.2024
- Active contributor to an educational platform built with Ruby on Rails, delivering 700+ production code contributions.
- Developed features for: Student scholarship management, Automatic teacher salary calculation based on defined criteria, Optimization of student transfer workflows.
- Adjusted permissions and APIs to enable a mobile application for parents.
- Maintained and improved bank reconciliation processes, reducing payment validation times.
- Supported production systems through debugging, ticket resolution, and test improvements.
Education
Full Stack Web Developer Program -
Microverse
Remote01.2026
BSc - Electronic Engineering
ITSX
Remote01.2011
Skills
Languages & Frameworks
Ruby, Ruby on Rails
JavaScript
HTML, CSS
Backend & Architecture
REST API design and implementation
Business logic modeling, service objects, refactoring
Third-party integrations (payments, identity verification, external APIs)
Databases
PostgreSQL, MySQL
SQL
Linux environments
Timeline
Back-end Developer
Manuable
08.2024 - Current
Back-end Developer
Saeko
08.2023 - 08.2024
BSc - Electronic Engineering
ITSX
Full Stack Web Developer Program -
Microverse