Post a Job
Romulo Celichini
Romulo Celichini

Senior Java Backend Engineer

Not looking · Member since 21 Oct 2026
Message
Location
Buenos Aires, Argentina
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Java Software Engineer with extensive experience building backend platforms for financial services, payment processing, banking integrations, and enterprise APIs.

I currently work at Visa on the Alias Directory Service for LATAM, developing secure and scalable Java microservices that support real-time payment identification through aliases such as QR codes and phone numbers.

My core expertise includes Java, Spring Boot, REST APIs, microservices, distributed systems, and transaction-processing integrations. I have worked with banks, payment providers, payment gateways, authorization flows, and financial platforms.

I have strong cloud and delivery experience with Google Cloud Platform, AWS, Docker, OpenShift, Jenkins, GitHub Actions, and Agile/Scrum practices. I am comfortable working across the full backend development lifecycle, from implementation and testing to deployment and production support.

I have worked with relational and NoSQL databases including PostgreSQL, Oracle, MongoDB, IBM DB2, and Microsoft SQL Server. I also use automated testing practices with JUnit and Mockito and apply software design patterns to build maintainable services.

I am a native Spanish speaker with advanced English proficiency, and I bring experience collaborating with cross-functional engineering, QA, support, and product teams in enterprise environments.

Skills

26 capabilities
Agile MethodologiesAPI DevelopmentBackend DevelopmentC#CI CDCloud ComputingDistributed SystemsFinancial ServicesHibernateISO 8583JavaJDBCKanbanMicroservicesPayment ProcessingREST APIsScrumSecrets ManagementSOAPSoftware Design PatternsSpring BootSpring MVCSpring SecurityTeam LeadershipUnit TestingXML

Tech stack & tools

Working toolkit

Application Hosting

Jenkins

Data Stores

MongoDBPostgreSQL

Development

Apache MavenDockerGitHashiCorp Vault

Languages & Frameworks

JUnit

Experience

Career history

Senior Java Software Engineer Visa

I develop and maintain Java-based microservices for Visa's Alias Directory Service (ADS) across LATAM. The platform enables payment clients to be identified through aliases including QR codes, phone numbers, words, and other identifiers.

I work in Google Cloud Platform using Pub/Sub for messaging, Spanner for the data layer, and Vault for secure secrets management. I collaborate with an Agile engineering team to deliver reliable backend services for regional payment-related use cases.

Java Developer FedEx

I worked on infrastructure modernization and the migration and renewal of the Cairo project. I developed and maintained Java backend components, microservices, and REST APIs using Spring Boot and Hibernate.

I worked with Oracle databases and created and maintained Jenkins CI/CD pipelines. My responsibilities included managing application module uploads and deployments through Jenkins.

Java Backend Developer AstroPay

I integrated new transaction-processing entities, including banks and payment providers, with AstroPay internal platforms. I developed Java APIs and backend microservices supporting external payment and banking integrations.

I used Java 11, Spring Boot, AWS, Jenkins, PostgreSQL, and Docker. I also applied software design patterns and developed automated unit tests with JUnit and Mockito in an Agile/Scrum environment.

Technical Reference Fiserv

I worked on government and payment-processing projects, including AGIP transaction-processing services and Ank payment gateway implementations. My work included web services and transaction authorization capabilities.

I worked with Java 11, WebSphere, SOAP XML, Spring 2.0, JDBC, Spring Security, Spring MVC, and IBM DB2. I collaborated with developers, QA analysts, support personnel, analysts, and a project manager in a Kanban-based team.

Java Backend Developer Galicia Bank

I developed a Java API microservices framework for Galicia Bank, designed to provide a modern and unified communication layer between backend and frontend systems.

I worked with Java 11, Spring Boot, JDBC, Apache Camel, OpenShift, REST APIs, MongoDB, PostgreSQL, and Microsoft SQL Server. I also contributed to testing with JUnit and Mockito within Scrum and Agile delivery practices.

Education

Learning history

Universidad Nacional del Sur

Bachelor of Science, Computer Science

Bachelor of Science studies in Computer Science.

This professional hasn’t added portfolio projects yet.

This professional hasn’t listed any services yet.

Report this profile

Why are you reporting this profile?
Share
Jobs Talent AI Tools Salaries
Menu