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Romulo Celichini

@romulocelichini

Senior Java Backend Engineer at Visa, contributing to the Alias Directory Service for LATAM payment clients.

At Visa, I contribute to the Alias Directory Service (ADS) for LATAM, which identifies payment clients through aliases such as QR codes and phone numbers. I develop and maintain Java microservices for the service using Google Cloud Platform, Pub/Sub, Spanner, and Vault.

At Fedex, I developed and maintained Java backend components and REST APIs for an infrastructure modernization project. I also worked with Spring Boot, Hibernate, Oracle, and Jenkins CI/CD pipelines.

At Astropay, I developed Java APIs and backend microservices to integrate banks and payment providers with internal transaction-processing platforms. I worked with AWS deployments, PostgreSQL, Docker, JUnit, and Mockito.

Earlier, at Fiserv, I worked on government transaction-processing services and a payment gateway, including web services and transaction authorization. At Galicia Bank, I developed Java API microservices deployed on OpenShift, using Spring Boot and Camel.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Software Engineer

Current

Visa

Jan 2025 - Present (1 year 9 months)

Develop and maintain Java-based microservices supporting Visa's Alias Directory Service for LATAM clients. Work within a Google Cloud Platform environment using Pub/Sub, Spanner, and Vault for secure, scalable payment services.

Java Microservices GCP Pub Sub Spanner Vault

Java Developer

FedEx

Mar 2023 - Jan 2025 (1 year 10 months)

Developed and maintained Java-based backend components for infrastructure modernization and migration of the Cairo project. Worked with Hibernate, Spring Boot, REST APIs, Oracle, and Jenkins CI/CD pipelines.

Java Hibernate Spring Boot REST APIs Oracle Microservices Jenkins

Java Backend Developer

AstroPay

Mar 2022 - Feb 2023 (11 months)

Developed Java APIs to integrate external banks and payment providers with AstroPay's internal platforms. Contributed to transaction-processing integrations and worked with AWS, Jenkins, Docker, and PostgreSQL in an Agile environment.

Java 11 Spring Boot Microservices REST APIs AWS Jenkins Docker PostgreSQL Junit Mockito Design Patterns

Technical Reference

Fiserv

Mar 2021 - Mar 2022 (1 year)

Worked on government projects such as AGIP, providing Visa and Master transaction processing services, and implemented payment gateways. Developed web services and transaction authorization using Spring, JDBC, and Java 11.

Java Team Leadership Spring Boot REST APIs SoapUI JDBC Db2Connect Kanban Unit Testing Junit Mockito Git SVN

Java Backend Developer

Galicia Bank

May 2019 - Mar 2021 (1 year 10 months)

Developed a framework of Java API microservices deployed over OpenShift using Spring Boot and Camel for the bank client. Enabled a modern and unique way to communicate between back and front ends.