Open to new opportunities

Based in Barcelona, ES / Europe / Madrid

Franco Grion

Backend engineer · Java & distributed systems

Good systems. Quietly powerful.

I build the systems behind the experience.
9+ years of backend engineering across SaaS, fintech, travel and banking. Java microservices and cloud-native systems, with recent end-to-end delivery in NestJS, TypeScript and PostgreSQL.

Explore my work ↗ Get in touch ↗

Behind the interfaceFig. 01 / A request's journey

01 / entryREST API

02 / queueRabbitMQ

03 / workerJava service

04 / persistPostgreSQL

Waiting for your signal_

Illustrative flow. No request is sent to a backend.

Teams & companies

Explore the journey

Freedom Academy Personal development
Amadeus Travel technology
AlAhli NCB Digital banking
Alpha Fintech Payment platforms
Southwest Airlines Airline experiences
Globant Software engineering

01 / Selected work

Complex challenges. Meaningful outcomes.

A few things I've helped build, improve and keep running. The interesting part is always beneath the surface.

Freedom Academy

20k+

Lines delivered across the module

Freedom Academy2026 - Present

Fitness Platform Backend

An end-to-end backend module for a subscription SaaS focused on addiction recovery and self-improvement.

Defined the domain for profiles, goals, plans, workouts, progress tracking and daily logs.
Evolved the PostgreSQL schema with migrations, seeds, indexes, constraints and a migration path for existing users.
Unified recurring service behavior in FitnessAbstractService to reduce duplicated backend logic.

NestJS

TypeScript

Sequelize

PostgreSQL

Swagger

Explore the experience

Amadeus

−35%

Processing time with RabbitMQ

Amadeus2022 - 2025

Asynchronous Financial Workflows

High-volume expense-management microservices supporting critical financial workflows.

Introduced asynchronous processing with RabbitMQ for a faster, more resilient workflow.
Upgraded core services from Java 17 to Java 21 to improve performance and memory efficiency.
Improved observability through Grafana dashboards and custom metrics, alongside CI/CD and Kubernetes work.

Java 17-21

Spring Boot

RabbitMQ

Oracle DB

Kubernetes

Grafana

Explore the experience

Alpha Fintech

2 APIs

REST APIs built from the ground up

Alpha Fintech2016 - 2018

Payment Integration APIs

A secure payment-processor integration hub connecting external services through REST APIs.

Designed and delivered two integration APIs for secure payment processor communication.
Refactored legacy components to improve stability and maintainability.
Built microservices with Java, Spring Boot and PostgreSQL, supported by Maven and Jenkins.

Java 8

Spring Boot

PostgreSQLRESTSOAP

Jenkins

Explore the experience

02 / The journey

Different domains. Same curiosity.

From airline experiences and financial workflows to an end-to-end SaaS fitness platform. Always learning how the pieces fit together.

9+Years of
engineering experience

Jan 2026 - Present · Remote

Freedom Academy

Backend Developer

Subscription SaaS platform for addiction recovery and self-improvement

Designed and built the Fitness backend module end-to-end, shipping profiles, goals, plans, assigned plans, workouts, progress tracking and daily logs.
Delivered 20k+ lines across data models, migrations, DTOs, services, repositories and Swagger-documented REST endpoints.
Evolved the PostgreSQL schema with migrations, seeds, indexes and constraints, including a migration script to move existing users into fitness profiles.
Refactored shared service behavior into FitnessAbstractService to unify patterns across the module and reduce duplicated backend logic.

NestJS

TypeScript

Sequelize

PostgreSQL

SwaggerJWT/Passport

May 2022 - Sep 2025 · Remote

Amadeus

Senior Java Engineer

Expense Management Platform

Built and maintained microservices powering high-volume financial workflows.
Upgraded core services from Java 17 to 21, improving performance and memory efficiency.
Implemented async processing with RabbitMQ, cutting processing time by 35%.
Improved observability with Grafana dashboards and custom metrics.
Contributed to CI/CD pipelines and Kubernetes deployments.

Java 17-21

Spring Boot

Oracle DB

RabbitMQ

Kubernetes

Grafana

Jenkins

Dec 2020 - May 2022 · Remote

AlAhli NCB (via Crealogix)

Java Developer

Maintained and modernized the main banking portal for Saudi Arabia's largest bank.
Developed new microservices to replace legacy monolithic components.

Java 7

Spring

Oracle DBSOAP

GitLab

Jira

Jul 2018 - Nov 2020

New Zealand

Working Holiday

Adaptability, communication and multicultural teamwork across an international environment.

Dec 2016 - Jun 2018 · Remote

Alpha Fintech (via Qubits SRL)

Java Developer

Payment Processor Integration Hub

Built two REST APIs from scratch for secure payment processor integrations.
Refactored legacy systems to improve stability and performance.
Developed microservices using Java 8, Spring Boot and PostgreSQL.

Java 8

Spring Boot

PostgreSQLRESTSOAP

Maven

Jenkins

Oct 2015 - Nov 2016 · Argentina

Southwest Airlines (via Globant)

Full-Stack Developer

Enhanced the Southwest.com portal using jQuery and Backbone.
Contributed to migration toward microservices architecture.
Built automated test suites with JBehave.

jQuery

BackboneRESTJBehave

Java

03 / The toolkit

The right tools. For the right reasons.

A strong Java foundation, recent delivery with NestJS and TypeScript, and a practical approach to data and infrastructure.

Backend

Java 8–21

Spring Boot

NestJS

TypeScriptREST APIsMicroservices

The foundation. Services built to work together.

Data & Persistence

PostgreSQL

Oracle DB

Sequelize ORMSQL migrations

Data modeling, migrations and dependable persistence.

Infra & DevOps

Kubernetes

Jenkins

GitLab CI/CD

Grafana

Ship, observe, improve. Then do it again.

Messaging & Integrations

RabbitMQSOAP

SwaggerJWT/Passport

Connecting systems and documenting their contracts.

Tooling

Git

Maven

PostmanMockito

Jira

The small things that support good engineering.

RustLearning

OwnershipLifetimesasync/await

CargoCLI tools

Exploring systems-level thinking, one project at a time.

04 / Beyond the terminal

An engineer. And a little more.

Good engineering isn't only about code. It's also about perspective, communication and a healthy dose of curiosity.

A love for the problem.

Four national-level appearances at the Argentine Mathematical Olympiad. An early lesson in persistence, precision and finding another way.

Better, together.

Former Press Commission President at AVEIT. Leading communications, coordinating a team and learning to make ideas travel.

Let's find the words.

SpanishNative

EnglishFluent

ItalianIntermediate

Currently exploring Rust through CLI tools, backend services, Rustlings, Exercism and open source.

05 / What's next?

Open to opportunities

Something good starts with hello.

contact@francogrion.dev

LinkedIn GitHub

Barcelona, Spain · Open to remote work +34 677 940 475