Freelancer profile translated to English.

Description

Senior Java / Spring Boot Developer specializing in microservices, REST APIs, and backend system modernization. I help companies design, refactor, and evolve Java applications to be more maintainable, scalable, and easily integrated.

I primarily work with Java, Spring Boot, Spring Batch, JPA/Hibernate, OpenAPI, Feign, Docker, CI/CD, RabbitMQ/Kafka, and hexagonal architecture. I have experience in complex enterprise projects, integration with external APIs, batch processing, data modeling, testing, and improving legacy code.

I can bring value to projects where the following are needed:

Developing or maintaining Java/Spring Boot microservices.

Refactoring existing applications.

Designing REST APIs with an API-first/OpenAPI approach.

Integrating external systems using Feign, REST, queues, or events.

Creating robust batch processes with Spring Batch.

Improving architecture, code quality, and maintainability.

Providing technical support to teams in backend design decisions.

My approach is practical: understand the business problem, propose a clean solution, and deliver stable, tested, and easy-to-maintain code.

Industry field of expertise

Languages

Spanish
Native or bilingual
English
Conversational

Workplace preferences

Remote only

Primarily works remotely

UST
Senior Software Engineer
E-COMMERCE
January 2021 - Today (5 years and 7 months)
Madrid, Spain

• • Development and evolutionary maintenance of microservices with Spring Boot
• • Design and implementation of REST APIs following OpenAPI/Swagger specifications
• • Integration with Apple Store Server API, Google APIs, and Stripe
• • Development of REST integrations using Spring Cloud OpenFeign
• • Asynchronous processing using RabbitMQ
• • Development and maintenance of batch processes
• • Refactoring and modernization of existing services
• • Resolution of critical production incidents
• • Deployment and support on Kubernetes
REST API RabbitMQ Stripe API App Store Connect App Store Server API
UST
Senior Software Engineer
BANKING AND INSURANCE
April 2020 - February 2021 (10 months)
Madrid, Spain
Development of microservices for the generation and management of digital document signatures, integrated with corporate systems and external document platforms.
UST
Senior Software Engineer
BANKING AND INSURANCE
August 2019 - April 2020 (8 months)
Madrid, Spain
Development of Swagger/OpenAPI specification validators
Implementation of XML parsing and structural validations using JAXB
Automation of API validation processes
Detection of inconsistencies in REST contracts
Participation in technical definition and evolutionary maintenance of the tool