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Juan Fernando López Hernández

@juanfernandolopezh

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Full Stack Engineer at Banco G&T Continental, integrating payment systems and securing digital check signatures.

Guatemala

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At Banco G&T Continental, I led work to secure the visualization of digital signatures used in check payments with AES-256 encryption in a .NET 8 microservice. I also integrated seven .NET 8 microservices with the bank’s C++ core banking system and led credit card payment integrations across back-office applications, the web teller platform, and the banking-agent network.

Previously, I designed an SMS-based two-factor authentication module and automated billing reprocessing at OSIGU. At TELUS International Digital Solutions, I developed Java backend solutions for the NetCracker OSS/BSS platform; at Logika4IT, I developed credit-system audit and QR-code features and automated testing.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

Banco G&T Continental

Dec 2023 - Present (2 years 9 months)

Led migration and secure visualization of digital signatures for check payments using AES-256 encryption in a .NET 8 microservice. Integrated 7 new .NET 8 microservices with the bank's C++ core banking system and led development of credit card payment integration across multiple back-office applications.

Java C#C++Net ASP .NET Core 8.0 SQL Server JavaScript NodeJS Redis MongoDB Azure Git Postman Scrum

Full Stack Software Engineer

OSIGU

May 2024 - Oct 2024 (5 months)

Designed and deployed an SMS-based two-factor authentication module using Spring Security. Built and integrated a billing-reprocessing module that automated exception-handling logic across multiple databases within Spring Boot microservices.

Java Spring Boot Gradle Maven AWS Vue.Js PostgreSQL Oracle Informix Flyway Postman Git Vault Kibana Jira

Backend Java Engineer

TELUS International Digital Solutions

Aug 2022 - Sep 2023 (1 year 1 month)

Designed, developed, and maintained Java-based backend solutions within the NetCracker OSS/BSS platform for telecommunications clients. Delivered high-performing Java applications using OOD and SOLID design patterns, sustaining a CSAT score of 4.3/5.0.

Java Netcracker SQL Oracle Jira Google Workspace

Analyst & Java Developer

Logika4IT

Nov 2021 - Aug 2022 (9 months)

Developed and integrated an audit module for a credit system enabling web-to-mobile communication via RESTful APIs. Analyzed and automated repetitive testing using JUnit and Selenium, and built a QR-code scanning feature for the mobile credit application.